WO2022153137A1 - 表示装置 - Google Patents
表示装置 Download PDFInfo
- Publication number
- WO2022153137A1 WO2022153137A1 PCT/IB2022/050050 IB2022050050W WO2022153137A1 WO 2022153137 A1 WO2022153137 A1 WO 2022153137A1 IB 2022050050 W IB2022050050 W IB 2022050050W WO 2022153137 A1 WO2022153137 A1 WO 2022153137A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- light emitting
- display device
- emitting element
- conductive layer
- Prior art date
Links
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 67
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 65
- 239000001301 oxygen Substances 0.000 claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 59
- 238000009792 diffusion process Methods 0.000 claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 13
- 239000004065 semiconductor Substances 0.000 claims description 116
- 238000000034 method Methods 0.000 claims description 85
- 239000000758 substrate Substances 0.000 claims description 84
- 229910052782 aluminium Inorganic materials 0.000 claims description 34
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 34
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 31
- 239000001257 hydrogen Substances 0.000 claims description 25
- 229910052739 hydrogen Inorganic materials 0.000 claims description 25
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 24
- 229910052710 silicon Inorganic materials 0.000 claims description 24
- 239000010703 silicon Substances 0.000 claims description 24
- 238000004544 sputter deposition Methods 0.000 claims description 23
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 22
- 229910052757 nitrogen Inorganic materials 0.000 claims description 15
- 239000012212 insulator Substances 0.000 claims description 14
- 229910052735 hafnium Inorganic materials 0.000 claims description 8
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 claims description 7
- 239000010410 layer Substances 0.000 description 989
- 239000010408 film Substances 0.000 description 181
- 238000005401 electroluminescence Methods 0.000 description 168
- 239000000463 material Substances 0.000 description 101
- 230000006870 function Effects 0.000 description 79
- 239000000126 substance Substances 0.000 description 73
- 239000012535 impurity Substances 0.000 description 41
- 229910044991 metal oxide Inorganic materials 0.000 description 34
- 150000004706 metal oxides Chemical class 0.000 description 34
- 239000011701 zinc Substances 0.000 description 33
- 229910052751 metal Inorganic materials 0.000 description 29
- 239000002184 metal Substances 0.000 description 27
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 24
- 150000001875 compounds Chemical class 0.000 description 24
- 229910052802 copper Inorganic materials 0.000 description 24
- 239000010949 copper Substances 0.000 description 24
- 238000002347 injection Methods 0.000 description 22
- 239000007924 injection Substances 0.000 description 22
- 230000003287 optical effect Effects 0.000 description 20
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 19
- 229910052719 titanium Inorganic materials 0.000 description 19
- 239000010936 titanium Substances 0.000 description 19
- 230000032258 transport Effects 0.000 description 19
- 238000010586 diagram Methods 0.000 description 18
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 16
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 16
- 238000009413 insulation Methods 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 15
- 238000000231 atomic layer deposition Methods 0.000 description 15
- 239000013078 crystal Substances 0.000 description 15
- -1 etc.) Substances 0.000 description 15
- 229910052814 silicon oxide Inorganic materials 0.000 description 15
- 230000015572 biosynthetic process Effects 0.000 description 14
- 238000005530 etching Methods 0.000 description 14
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 13
- 229910052581 Si3N4 Inorganic materials 0.000 description 13
- 230000005525 hole transport Effects 0.000 description 13
- 229910052750 molybdenum Inorganic materials 0.000 description 13
- 239000011733 molybdenum Substances 0.000 description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 125000004429 atom Chemical group 0.000 description 12
- 239000011810 insulating material Substances 0.000 description 12
- 239000002096 quantum dot Substances 0.000 description 12
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 12
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 12
- 229910052721 tungsten Inorganic materials 0.000 description 12
- 239000010937 tungsten Substances 0.000 description 12
- 239000000956 alloy Substances 0.000 description 11
- 229910045601 alloy Inorganic materials 0.000 description 11
- 230000004888 barrier function Effects 0.000 description 11
- 229910052733 gallium Inorganic materials 0.000 description 11
- 239000007769 metal material Substances 0.000 description 11
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 10
- 230000001747 exhibiting effect Effects 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 10
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 10
- 239000010409 thin film Substances 0.000 description 10
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 9
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- 229910052738 indium Inorganic materials 0.000 description 9
- 239000011777 magnesium Substances 0.000 description 9
- 150000002894 organic compounds Chemical class 0.000 description 9
- 229910052709 silver Inorganic materials 0.000 description 9
- 239000004332 silver Substances 0.000 description 9
- 206010021143 Hypoxia Diseases 0.000 description 8
- 238000010030 laminating Methods 0.000 description 8
- 229910052759 nickel Inorganic materials 0.000 description 8
- 150000004767 nitrides Chemical class 0.000 description 8
- 239000011787 zinc oxide Substances 0.000 description 8
- 229910000838 Al alloy Inorganic materials 0.000 description 7
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 7
- 229910052749 magnesium Inorganic materials 0.000 description 7
- 238000007740 vapor deposition Methods 0.000 description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 6
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 6
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 6
- 238000005229 chemical vapour deposition Methods 0.000 description 6
- 239000003086 colorant Substances 0.000 description 6
- 150000004696 coordination complex Chemical class 0.000 description 6
- 238000010894 electron beam technology Methods 0.000 description 6
- 238000002149 energy-dispersive X-ray emission spectroscopy Methods 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 230000035699 permeability Effects 0.000 description 6
- 239000002356 single layer Substances 0.000 description 6
- 229910052725 zinc Inorganic materials 0.000 description 6
- 229910052726 zirconium Inorganic materials 0.000 description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 5
- 229910052779 Neodymium Inorganic materials 0.000 description 5
- 101100194362 Schizosaccharomyces pombe (strain 972 / ATCC 24843) res1 gene Proteins 0.000 description 5
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 5
- 239000000460 chlorine Substances 0.000 description 5
- 229910052801 chlorine Inorganic materials 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 5
- 239000011651 chromium Substances 0.000 description 5
- 230000005669 field effect Effects 0.000 description 5
- 229910000449 hafnium oxide Inorganic materials 0.000 description 5
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 5
- 150000002484 inorganic compounds Chemical class 0.000 description 5
- 229910010272 inorganic material Inorganic materials 0.000 description 5
- 239000011229 interlayer Substances 0.000 description 5
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 5
- 229910052763 palladium Inorganic materials 0.000 description 5
- 229910052697 platinum Inorganic materials 0.000 description 5
- 238000001004 secondary ion mass spectrometry Methods 0.000 description 5
- 229910052715 tantalum Inorganic materials 0.000 description 5
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 101100194363 Schizosaccharomyces pombe (strain 972 / ATCC 24843) res2 gene Proteins 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 4
- 150000001340 alkali metals Chemical class 0.000 description 4
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 4
- 150000001342 alkaline earth metals Chemical class 0.000 description 4
- GPBUGPUPKAGMDK-UHFFFAOYSA-N azanylidynemolybdenum Chemical compound [Mo]#N GPBUGPUPKAGMDK-UHFFFAOYSA-N 0.000 description 4
- XJHCXCQVJFPJIK-UHFFFAOYSA-M caesium fluoride Chemical compound [F-].[Cs+] XJHCXCQVJFPJIK-UHFFFAOYSA-M 0.000 description 4
- 239000000969 carrier Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 229910017052 cobalt Inorganic materials 0.000 description 4
- 239000010941 cobalt Substances 0.000 description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- 229910052732 germanium Inorganic materials 0.000 description 4
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- 229910003437 indium oxide Inorganic materials 0.000 description 4
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 4
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 4
- 238000000206 photolithography Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 229910052727 yttrium Inorganic materials 0.000 description 4
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 4
- XESMNQMWRSEIET-UHFFFAOYSA-N 2,9-dinaphthalen-2-yl-4,7-diphenyl-1,10-phenanthroline Chemical compound C1=CC=CC=C1C1=CC(C=2C=C3C=CC=CC3=CC=2)=NC2=C1C=CC1=C(C=3C=CC=CC=3)C=C(C=3C=C4C=CC=CC4=CC=3)N=C21 XESMNQMWRSEIET-UHFFFAOYSA-N 0.000 description 3
- DHDHJYNTEFLIHY-UHFFFAOYSA-N 4,7-diphenyl-1,10-phenanthroline Chemical compound C1=CC=CC=C1C1=CC=NC2=C1C=CC1=C(C=3C=CC=CC=3)C=CN=C21 DHDHJYNTEFLIHY-UHFFFAOYSA-N 0.000 description 3
- 229910052684 Cerium Inorganic materials 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 238000000560 X-ray reflectometry Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 229910001882 dioxygen Inorganic materials 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 150000002605 large molecules Chemical class 0.000 description 3
- 239000002105 nanoparticle Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 238000002310 reflectometry Methods 0.000 description 3
- 150000003384 small molecules Chemical class 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 238000005477 sputtering target Methods 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- VUFNLQXQSDUXKB-DOFZRALJSA-N 2-[4-[4-[bis(2-chloroethyl)amino]phenyl]butanoyloxy]ethyl (5z,8z,11z,14z)-icosa-5,8,11,14-tetraenoate Chemical group CCCCC\C=C/C\C=C/C\C=C/C\C=C/CCCC(=O)OCCOC(=O)CCCC1=CC=C(N(CCCl)CCCl)C=C1 VUFNLQXQSDUXKB-DOFZRALJSA-N 0.000 description 2
- 125000004105 2-pyridyl group Chemical group N1=C([*])C([H])=C([H])C([H])=C1[H] 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical group C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 229910021417 amorphous silicon Inorganic materials 0.000 description 2
- 150000004982 aromatic amines Chemical class 0.000 description 2
- 230000003190 augmentative effect Effects 0.000 description 2
- WZJYKHNJTSNBHV-UHFFFAOYSA-N benzo[h]quinoline Chemical group C1=CN=C2C3=CC=CC=C3C=CC2=C1 WZJYKHNJTSNBHV-UHFFFAOYSA-N 0.000 description 2
- 229910052790 beryllium Inorganic materials 0.000 description 2
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 125000000609 carbazolyl group Chemical class C1(=CC=CC=2C3=CC=CC=C3NC12)* 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000002484 cyclic voltammetry Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000000295 emission spectrum Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 210000003128 head Anatomy 0.000 description 2
- 238000004770 highest occupied molecular orbital Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 150000002500 ions Chemical group 0.000 description 2
- 229910052741 iridium Inorganic materials 0.000 description 2
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 2
- 229910052746 lanthanum Inorganic materials 0.000 description 2
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- 239000003446 ligand Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000002159 nanocrystal Substances 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000004549 pulsed laser deposition Methods 0.000 description 2
- 125000003373 pyrazinyl group Chemical group 0.000 description 2
- 150000003222 pyridines Chemical class 0.000 description 2
- 150000003230 pyrimidines Chemical class 0.000 description 2
- 125000000714 pyrimidinyl group Chemical group 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- XSCHRSMBECNVNS-UHFFFAOYSA-N quinoxaline Chemical class N1=CC=NC2=CC=CC=C21 XSCHRSMBECNVNS-UHFFFAOYSA-N 0.000 description 2
- 238000005488 sandblasting Methods 0.000 description 2
- 229910052594 sapphire Inorganic materials 0.000 description 2
- 239000010980 sapphire Substances 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000002230 thermal chemical vapour deposition Methods 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- 229910001887 tin oxide Inorganic materials 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 2
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 2
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical group C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 1
- QWENRTYMTSOGBR-UHFFFAOYSA-N 1H-1,2,3-Triazole Chemical group C=1C=NNN=1 QWENRTYMTSOGBR-UHFFFAOYSA-N 0.000 description 1
- VEPOHXYIFQMVHW-XOZOLZJESA-N 2,3-dihydroxybutanedioic acid (2S,3S)-3,4-dimethyl-2-phenylmorpholine Chemical compound OC(C(O)C(O)=O)C(O)=O.C[C@H]1[C@@H](OCCN1C)c1ccccc1 VEPOHXYIFQMVHW-XOZOLZJESA-N 0.000 description 1
- NSMJMUQZRGZMQC-UHFFFAOYSA-N 2-naphthalen-1-yl-1H-imidazo[4,5-f][1,10]phenanthroline Chemical compound C12=CC=CN=C2C2=NC=CC=C2C2=C1NC(C=1C3=CC=CC=C3C=CC=1)=N2 NSMJMUQZRGZMQC-UHFFFAOYSA-N 0.000 description 1
- YLZOPXRUQYQQID-UHFFFAOYSA-N 3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]propan-1-one Chemical compound N1N=NC=2CN(CCC=21)CCC(=O)N1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F YLZOPXRUQYQQID-UHFFFAOYSA-N 0.000 description 1
- AEJARLYXNFRVLK-UHFFFAOYSA-N 4H-1,2,3-triazole Chemical group C1C=NN=N1 AEJARLYXNFRVLK-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- ROFVEXUMMXZLPA-UHFFFAOYSA-N Bipyridyl Chemical class N1=CC=CC=C1C1=CC=CC=N1 ROFVEXUMMXZLPA-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 229910012294 LiPP Inorganic materials 0.000 description 1
- PCNDJXKNXGMECE-UHFFFAOYSA-N Phenazine Natural products C1=CC=CC2=NC3=CC=CC=C3N=C21 PCNDJXKNXGMECE-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000010748 Photoabsorption Effects 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- FZWLAAWBMGSTSO-UHFFFAOYSA-N Thiazole Chemical group C1=CSC=N1 FZWLAAWBMGSTSO-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 150000001454 anthracenes Chemical class 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- YVVVSJAMVJMZRF-UHFFFAOYSA-N c1cncc(c1)-c1cccc(c1)-c1cccc(c1)-c1nc(nc(n1)-c1cccc(c1)-c1cccc(c1)-c1cccnc1)-c1cccc(c1)-c1cccc(c1)-c1cccnc1 Chemical compound c1cncc(c1)-c1cccc(c1)-c1cccc(c1)-c1nc(nc(n1)-c1cccc(c1)-c1cccc(c1)-c1cccnc1)-c1cccc(c1)-c1cccc(c1)-c1cccnc1 YVVVSJAMVJMZRF-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- FJDQFPXHSGXQBY-UHFFFAOYSA-L caesium carbonate Chemical compound [Cs+].[Cs+].[O-]C([O-])=O FJDQFPXHSGXQBY-UHFFFAOYSA-L 0.000 description 1
- 229910000024 caesium carbonate Inorganic materials 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910052800 carbon group element Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007766 curtain coating Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000000412 dendrimer Substances 0.000 description 1
- 229920000736 dendritic polymer Polymers 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 125000005331 diazinyl group Chemical group N1=NC(=CC=C1)* 0.000 description 1
- 150000004826 dibenzofurans Chemical class 0.000 description 1
- IYYZUPMFVPLQIF-ALWQSETLSA-N dibenzothiophene Chemical class C1=CC=CC=2[34S]C3=C(C=21)C=CC=C3 IYYZUPMFVPLQIF-ALWQSETLSA-N 0.000 description 1
- AJNVQOSZGJRYEI-UHFFFAOYSA-N digallium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ga+3].[Ga+3] AJNVQOSZGJRYEI-UHFFFAOYSA-N 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000002524 electron diffraction data Methods 0.000 description 1
- 238000001941 electron spectroscopy Methods 0.000 description 1
- 125000006575 electron-withdrawing group Chemical group 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 238000007687 exposure technique Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 150000002220 fluorenes Chemical class 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 210000001061 forehead Anatomy 0.000 description 1
- 150000002240 furans Chemical class 0.000 description 1
- 229910001195 gallium oxide Inorganic materials 0.000 description 1
- 238000005247 gettering Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002390 heteroarenes Chemical class 0.000 description 1
- 125000001072 heteroaryl group Chemical group 0.000 description 1
- 150000002460 imidazoles Chemical class 0.000 description 1
- 125000002883 imidazolyl group Chemical group 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229940079865 intestinal antiinfectives imidazole derivative Drugs 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000005499 laser crystallization Methods 0.000 description 1
- 239000002649 leather substitute Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 1
- FUJCRWPEOMXPAD-UHFFFAOYSA-N lithium oxide Chemical compound [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 description 1
- 229910001947 lithium oxide Inorganic materials 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 1
- 239000013081 microcrystal Substances 0.000 description 1
- 229910021424 microcrystalline silicon Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004776 molecular orbital Methods 0.000 description 1
- 150000002790 naphthalenes Chemical class 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 150000004866 oxadiazoles Chemical class 0.000 description 1
- 150000007978 oxazole derivatives Chemical class 0.000 description 1
- 125000002971 oxazolyl group Chemical group 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 150000002987 phenanthrenes Chemical class 0.000 description 1
- 150000005359 phenylpyridines Chemical class 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000001420 photoelectron spectroscopy Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000003220 pyrenes Chemical class 0.000 description 1
- PBMFSQRYOILNGV-UHFFFAOYSA-N pyridazine Chemical group C1=CC=NN=C1 PBMFSQRYOILNGV-UHFFFAOYSA-N 0.000 description 1
- 229940083082 pyrimidine derivative acting on arteriolar smooth muscle Drugs 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 150000003248 quinolines Chemical class 0.000 description 1
- 125000002943 quinolinyl group Chemical group N1=C(C=CC2=CC=CC=C12)* 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229940042055 systemic antimycotics triazole derivative Drugs 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- 150000007979 thiazole derivatives Chemical class 0.000 description 1
- 150000003577 thiophenes Chemical class 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 125000005580 triphenylene group Chemical group 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/874—Passivation; Containers; Encapsulations including getter material or desiccant
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1222—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or crystalline structure of the active layer
- H01L27/1225—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or crystalline structure of the active layer with semiconductor materials not belonging to the group IV of the periodic table, e.g. InGaZnO
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1255—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs integrated with passive devices, e.g. auxiliary capacitors
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/1201—Manufacture or treatment
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/873—Encapsulations
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/123—Connection of the pixel electrodes to the thin film transistors [TFT]
Definitions
- One aspect of the present invention relates to a display device and a display module.
- One aspect of the present invention relates to a method for manufacturing a display device.
- one aspect of the present invention is not limited to the above technical fields.
- the technical fields of one aspect of the present invention disclosed in the present specification and the like include semiconductor devices, display devices, light emitting devices, power storage devices, storage devices, electronic devices, lighting devices, input devices, input / output devices, and methods for driving them. , Or a method for producing them, can be given as an example.
- the semiconductor device refers to all devices that can function by utilizing the semiconductor characteristics.
- a display device applicable to a display panel a liquid crystal display device, an organic EL (Electro Luminescence) element, a light emitting device including a light emitting element such as a light emitting diode (LED: Light Emitting Diode), and an electrophoresis method are typically used.
- Examples include electronic papers that display by means of.
- the basic configuration of an organic EL element is that a layer containing a luminescent organic compound is sandwiched between a pair of electrodes. By applying a voltage to this device, light emission can be obtained from a luminescent organic compound. Since the display device to which such an organic EL element is applied does not require a backlight, which is required for a liquid crystal display device or the like, a thin, lightweight, high-contrast, and low-power consumption display device can be realized. For example, an example of a display device using an organic EL element is described in Patent Document 1.
- the display panel is required to have high color reproducibility.
- the display panel is required to have high color reproducibility.
- One aspect of the present invention is to provide an extremely high-definition display device. Alternatively, one aspect of the present invention is to provide a highly reliable display device. Alternatively, one aspect of the present invention is to provide a display device in which high color reproducibility is realized. Alternatively, one aspect of the present invention is to provide a high-luminance display device. Alternatively, one aspect of the present invention is to provide a method for manufacturing the above-mentioned display device.
- One aspect of the present invention includes a light emitting element and an insulating layer arranged so as to cover the light emitting element, and the light emitting element includes a first conductive layer, an EL layer on the first conductive layer, and the like. It has a second conductive layer on the EL layer, and the insulating layer includes a first layer, a second layer on the first layer, and a third layer on the second layer.
- the first layer has a function of capturing or fixing at least one of water and oxygen
- the second layer has a function of suppressing the diffusion of at least one of water and oxygen.
- the layer is a display device having a higher concentration of carbon than at least one of the first layer and the second layer.
- another aspect of the present invention is on a transistor on a substrate, a first insulating layer on the transistor, a plug arranged so as to be embedded in the first insulating layer, and a first insulating layer. It has a light emitting element and a second insulating layer arranged so as to cover the light emitting element, and the light emitting element includes a first conductive layer, an EL layer on the first conductive layer, and an EL layer. It has a second conductive layer, the plug electrically connects one of the source and drain of the transistor and the first conductive layer, and the second insulating layer is the first layer.
- It has a second layer on the first layer and a third layer on the second layer, the first layer having the function of capturing or fixing at least one of water and oxygen.
- the second layer has a function of suppressing the diffusion of at least one of water and oxygen, and the third layer has a higher concentration of carbon than at least one of the first layer and the second layer. It is a display device.
- a third insulating layer is provided between the first insulating layer and the light emitting element, and the third insulating layer has a function of suppressing the diffusion of at least one of water and oxygen. It may be. Further, in the above configuration, it is preferable that the third insulating layer has nitrogen and silicon. Further, in the above configuration, the third insulating layer may be in contact with the second insulating layer in a region where it does not overlap with the light emitting element.
- the substrate may be a silicon substrate, and the transistor may have silicon in the channel forming region.
- the oxide semiconductor film may be provided on the substrate, and the transistor may have the oxide semiconductor film in the channel forming region.
- the first layer is in contact with the side surface of the EL layer. Further, in the above configuration, it is preferable that the first layer is formed by a sputtering method. Further, in the above configuration, it is preferable that the first layer has oxygen and aluminum. Further, in the above configuration, the first layer may be configured to have oxygen and hafnium.
- the second layer is formed by a sputtering method. Further, in the above configuration, it is preferable that the second layer has nitrogen and silicon.
- the third layer is formed by the ALD method. Further, in the above configuration, the third layer may be configured to have a higher hydrogen concentration than at least one of the first layer and the second layer. Further, in the above configuration, the third layer may be configured to have a lower density than at least one of the first layer and the second layer. Further, in the above configuration, the third layer may be configured to have oxygen and aluminum.
- the side surface of the EL layer may be located inside the side surface of the first conductive layer. Further, in the above configuration, the EL layer may be configured to cover the side surface of the first conductive layer. Further, in the above configuration, an insulator is arranged between the EL layer and the first conductive layer, and the insulator has an opening on the first conductive layer, and in the opening, the EL layer and the first conductive layer. May be configured so that they are in contact with each other.
- an extremely high-definition display device can be provided.
- a highly reliable display device can be provided.
- a high-luminance display device can be provided.
- a method of manufacturing the display device described above can be provided.
- 1A to 1C are diagrams showing a configuration example of a display device.
- 2A to 2C are diagrams showing a configuration example of a display device.
- 3A and 3B are diagrams showing a configuration example of the display device.
- 4A and 4B are diagrams for explaining a configuration example of the display device.
- 5A to 5D are diagrams for explaining an example of a method for manufacturing a display device.
- 6A to 6D are diagrams for explaining an example of a method for manufacturing a display device.
- 7A to 7C are diagrams for explaining an example of a method for manufacturing a display device.
- 8A and 8B are diagrams showing a configuration example of the display device.
- FIG. 9 is a diagram showing a configuration example of the display device.
- FIG. 10 is a diagram showing a configuration example of the display device.
- FIG. 11 is a diagram showing a configuration example of the display device.
- 12A and 12B are diagrams showing a configuration example of the display module.
- 13A and 13B are circuit diagrams showing an example of a display device.
- 14A and 14C are circuit diagrams showing an example of a display device.
- FIG. 14B is a timing chart showing an operation example of the display device.
- 15A and 15B are diagrams showing a configuration example of an electronic device.
- 16A and 16B are diagrams showing a configuration example of an electronic device.
- 17A to 17D are diagrams showing a configuration example of a display device.
- the display device of one aspect of the present invention includes a light emitting element (also referred to as a light emitting device) that emits light of a different color.
- the light emitting element includes a lower electrode, an upper electrode, and a light emitting layer (also referred to as a layer containing a luminescent compound) between them.
- a light emitting element it is preferable to use an electroluminescent element such as an organic EL element or an inorganic EL element.
- a light emitting diode (LED) may be used.
- an OLED Organic Light Emitting Diode
- a QLED Quadantum-dot Light Emitting Diode
- the luminescent compounds (also called light emitting substances) possessed by the EL element include substances that emit fluorescence (fluorescent materials), substances that emit phosphorescence (phosphorescent materials), inorganic compounds (quantum dot materials, etc.), and thermal activated delayed fluorescence. Examples of the substance shown (Thermally activated delayed fluorescence (TADF) material) and the like can be mentioned.
- TADF Thermally activated delayed fluorescence
- the luminescent substance a substance exhibiting a luminescent color such as blue, purple, bluish purple, green, yellowish green, yellow, orange, and red is appropriately used. Further, a substance that emits near-infrared light may be used.
- the light emitting layer may have one or more kinds of compounds (host material, assist material) in addition to the light emitting substance (guest material).
- the host material and the assist material one or a plurality of substances having an energy gap larger than the energy gap of the luminescent substance (guest material) can be selected and used.
- the host material and the assist material it is preferable to use a combination of compounds forming an excitation complex. In order to efficiently form an excitation complex, it is particularly preferable to combine a compound that easily receives holes (hole transporting material) and a compound that easily receives electrons (electron transporting material).
- Either a low molecular weight compound or a high molecular weight compound can be used for the light emitting element, and an inorganic compound (quantum dot material or the like) may be contained.
- the display device of one aspect of the present invention can produce light emitting elements of different colors with extremely high accuracy. Therefore, it is possible to realize a display device having a higher definition than the conventional display device.
- a pixel having one or more light emitting elements is arranged with a fineness of 2000 ppi or more, preferably 3000 ppi or more, more preferably 5000 ppi or more, still more preferably 6000 ppi or more, 20000 ppi or less, or 30000 ppi or less.
- a high-definition display device is preferable.
- FIG. 1A is a schematic cross-sectional view illustrating a display device according to an aspect of the present invention. Further, FIG. 1B is an enlarged view of the region A sandwiched between the light emitting elements 120 shown in FIG. 1A.
- the display device 100 includes a light emitting element 120R, a light emitting element 120G, and a light emitting element 120B.
- the light emitting element 120R is a light emitting element exhibiting red color
- the light emitting element 120G is a light emitting element exhibiting green color
- the light emitting element 120B is a light emitting element exhibiting blue color.
- the symbol added to the reference numeral may be omitted and the description may be described as the light emitting element 120.
- the EL layer 115R, the EL layer 115G, and the EL layer 115B which will be described later, may also be described as the EL layer 115 in the same manner.
- the EL layer 115R is included in the light emitting element 120R.
- the EL layer 115G is included in the light emitting element 120G
- the EL layer 115B is included in the light emitting element 120B.
- the conductive layer 114R, the conductive layer 114G, and the conductive layer 114B may also be described as the conductive layer 114 in the same manner.
- the conductive layer 114R is included in the light emitting element 120R.
- the conductive layer 114G is included in the light emitting element 120G, and the conductive layer 114B is included in the light emitting element 120B.
- the light emitting element 120 has a conductive layer 111 that functions as a lower electrode, an EL layer 115, and a conductive layer 116 that functions as an upper electrode.
- the conductive layer 111 has reflectivity with respect to visible light.
- the conductive layer 116 has transparency and reflectivity with respect to visible light.
- the conductive layer 116 may be semi-transmissive and semi-reflective with respect to visible light.
- the EL layer 115 contains a luminescent compound.
- the EL layer 115 has at least a light emitting layer that the light emitting element 120 has.
- the light emitting element 120 an electroluminescent element having a function of emitting light by a current flowing through the EL layer 115 by giving a potential difference between the conductive layer 111 and the conductive layer 116 can be used.
- an organic EL element using a luminescent organic compound to the EL layer 115.
- the light emitting element 120 is preferably an element whose emission spectrum emits white light having two or more peaks in the visible light region.
- the upper surface of the conductive layer 111 is reflective to visible light.
- the display device 100 includes a substrate 101 including a semiconductor circuit and a light emitting element 120 on the substrate 101. Further, the display device 100 shown in FIG. 1A includes an insulating layer 121 on the substrate 101, a light emitting element 120 on the insulating layer 121, and an insulating layer 124 arranged so as to cover the light emitting element 120.
- the insulating layer 124 is preferably in contact with the upper surface and side surfaces of the conductive layer 116, the side surfaces of the EL layer 115, and the side surfaces of the conductive layer 111. Further, the insulating layer 124 may come into contact with the insulating layer 121 in a region where it does not overlap with the light emitting element 120.
- the board 101 a circuit board having a transistor, wiring, and the like can be used.
- an insulating substrate such as a glass substrate can be used as the substrate 101.
- the substrate 101 is a substrate provided with a circuit (also referred to as a pixel circuit) for driving each light emitting element.
- the substrate 101 may be provided with a semiconductor circuit that functions as a drive circuit for driving the pixel circuit.
- a pixel circuit or a semiconductor element constituting a semiconductor circuit may be formed of a semiconductor substrate such as a silicon substrate, or may be formed of an oxide semiconductor film. A more specific configuration example of the substrate 101 will be described later.
- the substrate 101 and the conductive layer 111 of the light emitting element 120 are electrically connected via the plug 131.
- the plug 131 is formed so as to be embedded in the opening provided in the insulating layer 121.
- the conductive layer 111 is formed on the insulating layer 121.
- the conductive layer 111 is provided on the plug 131.
- the conductive layer 111 and the plug 131 are electrically connected. Further, the conductive layer 111 is preferably in contact with the upper surface of the plug 131. Further, the conductive layer 111 may be configured to be in contact with the upper surface of the insulating layer 121.
- the insulating layer 124 preferably functions as a barrier insulating film against at least one of water and oxygen. More preferably, it functions as a barrier insulating film against hydrogen, a substance to which hydrogen is bonded (for example, water ( H2O ), etc.), oxygen, chlorine and the like. Further, the insulating layer 124 preferably includes a layer having a function of suppressing the diffusion of at least one of water and oxygen. More preferably, it contains a layer having a function of suppressing diffusion of hydrogen, a substance to which hydrogen is bonded (for example, water ( H2O ), etc.), oxygen, chlorine and the like.
- the insulating layer 124 preferably includes a layer having a function of capturing or fixing at least one of water and oxygen (also referred to as gettering). More preferably, it includes a layer having a function of capturing or fixing hydrogen, a substance to which hydrogen is bound (for example, water ( H2O ), etc.), oxygen, chlorine and the like.
- the barrier insulating film refers to an insulating film having a barrier property.
- the barrier property is a function of suppressing the diffusion of the corresponding substance (also referred to as low permeability).
- the corresponding substance has the function of capturing or fixing.
- the insulating layer 124 preferably has a layer 124a, a layer 124b on the layer 124a, and a layer 124c on the layer 124b.
- the layer 124a is a layer having a function of capturing or fixing at least one of water and oxygen.
- the layer 124b is a layer having a function of suppressing the diffusion of at least one of water and oxygen.
- the layer 124c is a layer having good coverage.
- the layer 124a is arranged at least between the layer 124b and the EL layer 115. Further, it is preferable that the layer 124a is in contact with the upper surface and the side surface of the conductive layer 116, the side surface of the EL layer 115, and the side surface of the conductive layer 111. Further, the layer 124a may come into contact with the insulating layer 121 in the region sandwiched between the conductive layers 111. Further, the layer 124b is provided so as to cover the layer 124a, and is preferably in contact with the upper surface of the layer 124a.
- the layer 124a and the layer 124b in this way, impurities such as oxygen and water in the light emitting element 120 are captured or fixed to the layer 124a in the region covered by the layer 124b, and are included in the light emitting element 120. Impurities can be reduced.
- the layer 124a is provided in contact with the side surface of the EL layer 115 to which impurities are likely to adhere during processing, it is possible to suppress the formation of a different layer composed of the impurities on the side surface of the EL layer 115. ..
- the layer 124b can prevent impurities such as oxygen and water from diffusing from the insulating layer 124 onto the light emitting element 120, and can prevent impurities in the light emitting element from increasing.
- the layer 124c is provided so as to cover the layer 124b, and is preferably in contact with the upper surface of the layer 124b.
- the layer 124c is preferably formed by using an atomic layer deposition (ALD) method having good coverage.
- ALD atomic layer deposition
- the layer 124b has irregularities that reflect the shape of the surface to be formed, that is, the stepped shapes of the conductive layer 111, the EL layer 115, and the conductive layer 116. As a result, the layer 124b may have a step break or the like. However, as described above, by providing the layer 124c having a good covering property, even if a step break or the like is formed in the layer 124b, it can be embedded by the layer 124c. Therefore, the function of the layer 124b to suppress the diffusion of impurities such as water and oxygen is maintained.
- one aspect of the present invention can reduce impurities such as water or oxygen in the light emitting element and prevent deterioration of the light emitting element, so that a highly reliable display device can be provided.
- an insulating layer 122 may be further provided between the insulating layer 121 and the conductive layer 111 and the insulating layer 124.
- the insulating layer 122 like the insulating layer 124, preferably functions as a barrier insulating film against at least one of water and oxygen.
- As the insulating layer 122 it is preferable to use either or both of an insulating layer having the same function as the layer 124a and an insulating layer having the same function as the layer 124b.
- a laminate having an insulating layer having the same function as the layer 124b and an insulating layer having the same function as the layer 124a on the insulating layer can be used as the insulating layer 122.
- the interlayer insulating film provided below the light emitting element 120 and a semiconductor circuit such as a pixel circuit include the insulating layer 122. It is possible to prevent impurities such as water and oxygen from diffusing into the light emitting element 120. This makes it possible to prevent the light emitting element 120 from deteriorating.
- the insulating layer 124 has a structure in contact with the insulating layer 122 in a region that does not overlap with the conductive layer 111.
- the insulating layer 124 is in contact with the upper surface and the side surface of the conductive layer 116, the side surface of the EL layer 115, and the side surface of the conductive layer 111.
- the light emitting element 120 has a structure in which the insulating layer 124 and the insulating layer 122 surround the light emitting element 120.
- the EL layer 115 and the conductive layer 116 are separated between adjacent light emitting elements of different colors. This makes it possible to prevent a leak current flowing through the EL layer 115 between adjacent light emitting elements of different colors. Therefore, the light emission generated by the leak current can be suppressed, and a high-contrast display can be realized. Further, even when the definition is increased, a highly conductive material can be used for the EL layer 115, so that the range of material selection can be expanded, and efficiency can be improved, power consumption can be reduced, and reliability can be improved. It becomes easy to improve.
- the EL layer 115 and the conductive layer 116 are processed so as to be continuous without being divided between pixels exhibiting the same color.
- the EL layer 115 and the conductive layer 116 can be processed into stripes.
- a predetermined potential can be applied without the conductive layers 116 of all the light emitting elements being in a floating state.
- the EL layer 115 and the conductive layer 116 may form an island-shaped pattern by film formation using a metal mask or a shadow mask such as FMM (fine metal mask, high-definition metal mask), but in particular, metal. It is preferable to use a processing method that does not use a mask or FMM. As such a processing method, a photolithography method can be typically used. In addition, a forming method such as a nanoimprint method or a sandblasting method can also be used. In the present specification and the like, a metal mask or a device manufactured by using FMM may be referred to as a device having an MM (metal mask) structure. Further, in the present specification and the like, a device manufactured without using a metal mask or FMM may be referred to as a device having an MML (metal maskless) structure.
- FMM fine metal mask, high-definition metal mask
- the end portion of the EL layer 115 may be substantially aligned with the end portion of the conductive layer 111. Further, the end portion of the conductive layer 116 may be substantially aligned with the end portion of the conductive layer 111. Further, one end of the EL layer 115 may be located outside the conductive layer 111, and the other end may be substantially aligned with the end of the conductive layer 111. Further, one end of the conductive layer 116 may be located outside the conductive layer 111, and the other end may be substantially aligned with the end of the conductive layer 111. Further, as shown in FIG. 2A, the end portion of the EL layer 115 may be arranged so as to be located inside the end portion of the conductive layer 111 in the cross section of the display device 100.
- the conductive layer 116 may be arranged so as not to be short-circuited with at least the conductive layer 111.
- the end portion of the EL layer 115 may be arranged so as to be located outside the end portion of the conductive layer 111.
- the end of the EL layer 115 covers the end of the conductive layer 111.
- the end portion of the conductive layer 116 may be arranged so as to be located outside the end portion of the conductive layer 111 in the cross section of the display device 100.
- an insulator 117 may be provided to cover the end portion of the conductive layer 116.
- the insulator 117 can also be called a bank, a partition wall, a barrier, a bank, or the like.
- the insulator 117 is provided so as to expose the upper surface of the conductive layer 111. By providing the insulator 117, it is possible to suppress a short circuit between the conductive layer 111 and the conductive layer 116.
- FIGS. 2A to 2C the structure in which the insulating layer 124 is provided is shown as in FIG. 1A, but the structure is not limited to this and may be the same as the structure shown in FIG. 1C.
- the light emitting element that can be used for the light emitting element 120, an element capable of self-luminous light can be used, and an element whose brightness is controlled by a current or a voltage is included in the category.
- LEDs, organic EL elements, inorganic EL elements and the like can be used.
- top emission type bottom emission type, dual emission type, etc.
- a conductive film that transmits visible light is used for the electrode on the side that extracts light. Further, it is preferable to use a conductive film that reflects visible light for the electrode on the side that does not take out light.
- a top emission type that emits light to the side opposite to the surface to be formed, or light is emitted to both the surface to be formed and the side opposite to the surface to be formed.
- a dual emission type light emitting element can be preferably used.
- the EL layer 115 has at least a light emitting layer.
- the EL layer 115 is a substance having a high hole injecting property, a substance having a high hole transporting property, a hole blocking material, a substance having a high electron transporting property, a substance having a high electron injecting property, or a bipolar property. It may further have a layer containing the substance (substance having high electron transport property and hole transport property) and the like.
- Either a low molecular weight compound or a high molecular weight compound can be used for the EL layer 115, and an inorganic compound may be contained.
- the layers constituting the EL layer 115 can be formed by a vapor deposition method (including a vacuum vapor deposition method), a transfer method, a printing method, an inkjet method, a coating method, or the like.
- the EL layer 115 used for the light emitting element 120B is referred to as an EL layer 115B
- the EL layer 115 used for the light emitting element 120G is referred to as an EL layer 115G
- the EL layer 115 used for the light emitting element 120R is referred to as an EL layer 115R.
- the EL layer 115B has a luminescent substance that emits B (blue).
- the EL layer 115G has a luminescent substance that emits G (green).
- the EL layer 115R has a luminescent substance that emits R (red) light.
- an SBS Side By Side
- the above-mentioned light emitting layer and the layer containing a substance having a high hole injecting property, a substance having a high hole transporting property, a substance having a high electron transporting property, a substance having a high electron injecting property, a bipolar substance, and the like are included.
- Each may have an inorganic compound such as a quantum dot or a polymer compound (oligoform, dendrimer, polymer, etc.).
- quantum dots in the light emitting layer it can function as a light emitting material.
- a colloidal quantum dot material an alloy type quantum dot material, a core / shell type quantum dot material, a core type quantum dot material, or the like can be used.
- materials containing element groups of groups 12 and 16, groups 13 and 15, or groups 14 and 16 may be used.
- a quantum dot material containing elements such as cadmium, selenium, zinc, sulfur, phosphorus, indium, tellurium, lead, gallium, arsenic, and aluminum may be used.
- the conductive film that transmits visible light and can be used for the conductive layer 116 and the like is formed by using, for example, indium oxide, indium tin oxide, indium zinc oxide, zinc oxide, zinc oxide added with gallium, or the like. can do.
- metal materials such as gold, silver, platinum, magnesium, nickel, tungsten, chromium, molybdenum, iron, cobalt, copper, palladium, or titanium, alloys containing these metal materials, or nitrides of these metal materials (for example, Titanium nitride) or the like can also be used by forming it thin enough to have translucency.
- the laminated film of the above material can be used as the conductive layer.
- graphene or the like may be used.
- the transflective and semi-reflective conductive film that can be used for the conductive layer 116 has a reflectance for visible light (for example, a reflectance for light of a predetermined wavelength in the range of 400 nm to 700 nm) of 20% or more and 80. % Or less, preferably 40% or more and 70% or less.
- the reflectance of the conductive film having reflectance with respect to visible light is preferably 40% or more and 100% or less, preferably 70% or more and 100% or less.
- the reflectance of the translucent conductive film with respect to visible light is preferably 0% or more and 40% or less, preferably 0% or more and 30% or less.
- the conductive layer 111 it is preferable to use the conductive film that reflects visible light in a portion located on the EL layer 115 side.
- a metal material such as aluminum, gold, platinum, silver, nickel, tungsten, chromium, molybdenum, iron, cobalt, copper, or palladium, or an alloy containing these metal materials can be used. Copper has a high reflectance of visible light and is preferable. Further, aluminum is preferable because it is easy to process because the electrode is easily etched and has high reflectance of visible light and near infrared light. Further, lanthanum, neodymium, germanium or the like may be added to the above metal material or alloy.
- an alloy containing titanium, nickel, or neodymium and aluminum may be used.
- an alloy containing copper, palladium, magnesium and silver may be used. Alloys containing silver and copper are preferred because they have high heat resistance.
- the conductive layer 111 may be configured by laminating a conductive metal oxide film on a conductive film that reflects visible light.
- oxidation and corrosion of the conductive film that reflects visible light can be suppressed.
- oxidation can be suppressed by laminating a metal film or a metal oxide film in contact with an aluminum film or an aluminum alloy film.
- materials for such metal films and metal oxide films include titanium and titanium oxide.
- the conductive film that transmits visible light and the film made of a metal material may be laminated. For example, a laminated film of silver and indium tin oxide, a laminated film of an alloy of silver and magnesium and indium tin oxide, and the like can be used.
- the conductive layer 111a may be provided as the lower conductive layer, and the conductive layer 111b may be provided on the conductive layer 111a as the upper conductive layer.
- the reflectance of the conductive layer 111a may be lower than that of the conductive layer 111b.
- a highly conductive material may be used as the conductive layer 111a.
- a material having excellent workability may be used as the conductive layer 111a.
- the conductive layer 111b it is preferable to apply the materials and configurations that can be used for the conductive layer 111 described above.
- Examples of the conductive layer 111a include metal materials such as gold, silver, platinum, magnesium, nickel, tungsten, chromium, molybdenum, iron, cobalt, copper, palladium, titanium, yttrium, zirconium, and tantalum, and alloys containing these metal materials. , Or nitrides of these metallic materials (for example, titanium nitride) and the like can be used.
- the reflectance of visible light or the like can be sufficiently increased by setting the thickness to preferably 40 nm or more, more preferably 70 nm or more.
- the reflectance of visible light or the like can be sufficiently increased by setting the thickness to preferably 70 nm or more, more preferably 100 nm or more.
- tungsten can be used as the conductive layer 111a
- aluminum or an aluminum alloy can be used as the conductive layer 111b.
- the conductive layer 111b may be configured such that titanium oxide is provided in contact with the upper part of aluminum or an aluminum alloy.
- the conductive layer 111b may be configured such that titanium is provided in contact with the upper part of aluminum or an aluminum alloy, and titanium oxide is provided in contact with the upper part of titanium.
- both the conductive layer 111a and the conductive layer 111b may use materials and configurations selected from the materials and configurations that can be used for the conductive layer 111 listed above.
- the conductive layer 111 may be a laminated film having three or more layers.
- FIG. 3A shows a configuration in which the insulating layer 124 is provided as in FIG. 1A, but the present invention is not limited to this.
- an insulating layer 122 may be further provided in the same manner as the structure shown in FIG. 1C.
- Materials that can be used for the plug 131 include metals such as aluminum, titanium, chromium, nickel, copper, yttrium, zirconium, molybdenum, gold, silver, platinum, magnesium, iron, cobalt, palladium, tantalum, or tungsten, these metals. Examples include alloys containing materials, nitrides of these metallic materials, and the like. Further, as the plug 131, a film containing these materials can be used as a single layer or as a laminated structure.
- a single-layer structure of an aluminum film containing silicon a two-layer structure in which an aluminum film is laminated on a titanium film, a two-layer structure in which an aluminum film is laminated on a tungsten film, and a copper film on a copper-magnesium-aluminum alloy film.
- Two-layer structure for laminating two-layer structure for laminating a copper film on a titanium film, two-layer structure for laminating a copper film on a tungsten film, a titanium film or a titanium nitride film, and an aluminum film or a copper film on top of it.
- An oxide such as indium oxide, tin oxide or zinc oxide may be used. Further, it is preferable to use copper containing manganese because the controllability of the shape by etching is improved.
- the electrodes constituting the light emitting element may be formed by a vapor deposition method or a sputtering method, respectively. In addition, it can be formed by using a ejection method such as an inkjet method, a printing method such as a screen printing method, or a plating method.
- an oxide, a nitride, an oxide nitride, or an oxide having at least one of aluminum, hafnium, magnesium, gallium, indium, zinc, and silicon can be used. Further, it may be used as a laminated film thereof.
- aluminum oxide, hafnium oxide, hafnium aluminate, magnesium oxide, gallium oxide, indium gallium zinc oxide, silicon oxide, silicon nitride, silicon nitride nitride, silicon nitride and the like can be used.
- Examples of the layer 124a having a function of capturing or fixing impurities such as water or oxygen include aluminum oxide (AlO x : x is an arbitrary number greater than 0) or hafnium oxide (AlO x: x is an arbitrary number larger than 0) formed by a sputtering method. It is preferable to use a metal oxide such as HfO y : y is an arbitrary number larger than 0).
- AlO x : x is an arbitrary number greater than 0
- hafnium oxide AlO x: x is an arbitrary number larger than 0
- HfO y a metal oxide
- the layer 124a becomes an insulator having at least oxygen and aluminum.
- hafnium oxide is used for the layer 124a
- the layer 124a is an insulator having at least oxygen and hafnium.
- Layer 124a preferably contains a large amount of oxygen deficiency.
- a large amount of dangling bonds may be formed, and the dangling bonds may have a property of capturing or fixing impurities such as water or oxygen.
- impurities such as water and oxygen can be captured or fixed in the layer 124a.
- the layer 124a is formed by using a sputtering method.
- impurities such as water can be formed without using the film forming gas, so that the increase in the concentration of impurities such as water in the layer 124a and the light emitting element 120 can be reduced. can.
- the film is formed by the sputtering method, it is preferable to reduce the oxygen in the film forming gas or not to include oxygen in the film forming gas. Thereby, the increase of oxygen in the layer 124a and the light emitting element 120 can be reduced. Further, the formed layer 124a can contain a large amount of oxygen deficiency.
- the layer 124a may use a metal oxide having an amorphous structure.
- the layer 124a may have a crystal region partially formed.
- the layer 124a may have a multi-layer structure in which a layer having an amorphous structure and a layer having a crystal region are laminated.
- the layer 124a may be a laminated structure in which a layer having a crystal region is formed on a layer having an amorphous structure, typically a layer having a polycrystalline structure is formed.
- the layer 124b having a function of suppressing the diffusion of impurities such as water and oxygen it is preferable to use silicon nitride (SiN x : x is an arbitrary number larger than 0) formed by, for example, a sputtering method. ..
- layer 124b is an insulator having at least nitrogen and silicon.
- the layer 124b has a film thickness of 10 nm or more, for example, 20 nm or more and 100 nm or less, and for example, 20 nm or more and 50 nm or less on the conductive layer 116 in order to suppress the diffusion of impurities such as water or oxygen. Is preferable.
- the layer 124b is formed by using a sputtering method.
- a metal nitride can be formed without using impurities such as water or oxygen in the film forming gas. Therefore, water in the layer 124b, the layer 124a and the light emitting element 120. , Or the increase in the concentration of impurities such as oxygen can be reduced.
- an insulating material that can be used for the above-mentioned insulating layer 124 may be used.
- H2O or O3 is used as an oxidizing agent, but since the layer 124b and the layer 124a are formed before the layer 124c is formed, the EL layer is formed. It is possible to reduce the uptake of impurities such as water and oxygen into 115 and the like.
- the film provided by the ALD method may contain a large amount of impurities such as hydrogen or carbon as compared with the film provided by other film forming methods. Therefore, the layer 124c may have a higher carbon concentration than at least one of the layer 124a and the layer 124b formed by the sputtering method. Further, the layer 124c may have a higher hydrogen concentration than at least one of the layer 124a and the layer 124b formed by the sputtering method.
- EDX Energy Dispersive X-ray Spectroscopy
- XPS X-ray Photoelectron Spectroscopy
- SIMS Secondary Ion Mass Spectrometry
- the film formed by the ALD method may tend to have a lower density than the film formed by the sputtering method. Therefore, the density of the layer 124c may be lower than that of at least one of the layer 124a and the layer 124b formed by the sputtering method.
- the density can be measured by using an X-ray reflectivity analysis method (XRR: X-ray Reflectivity Analysis) or the like.
- the ALD method includes a thermal ALD (Thermal ALD) method in which the reaction of the precursor and the reactor is performed only by thermal energy, and a PEALD (Plasma Enhanced ALD) method using a plasma-excited reactor.
- Any ALD method may be used as long as the EL layer 115 can be deposited at a temperature that does not deteriorate (for example, at room temperature or higher and 100 ° C. or lower).
- the insulating layer 122 an insulating material that can be used for the above-mentioned layer 124a or layer 124b may be used. Further, the insulating layer 122 may also have a laminated structure. For example, in the case of a two-layer structure, the structure may be such that an aluminum oxide film formed by the sputtering method is provided on the silicon nitride film formed by the sputtering method.
- the insulating layer 121 functions as an interlayer insulating film and has a low dielectric constant.
- a material having a low dielectric constant as an interlayer film, it is possible to reduce the parasitic capacitance generated between the wirings.
- silicon oxide, silicon oxide nitride, silicon oxide to which fluorine is added, silicon oxide to which carbon is added, silicon oxide to which carbon and nitrogen are added, silicon oxide having pores, and the like may be appropriately used.
- a recess may be formed on the surface where the conductive layer 111 is not provided.
- the insulating layer 121 is etched to form a recess.
- an insulating material that can be used for the insulating layer 121 may be used for the insulator 117 shown in FIG. 2C.
- the insulating layer 122 is in contact with the conductive layer 111 and the insulating layer 124.
- the insulating layer 122 and the conductive layer 111 and the insulating layer 124 are in contact with each other.
- An insulating layer 125 may be provided between the two.
- an insulating material that can be used for the insulating layer 121 may be used.
- a recess may be formed on the surface where the conductive layer 111 is not provided.
- the insulating layer 125 is etched to form a recess.
- a white light emitting substance may be applied as the EL layer 115 included in the light emitting element 120.
- a colored layer that overlaps with the light emitting element 120 may be provided.
- the EL layer 115 contains two or more kinds of luminescent substances.
- white light emission can be obtained by selecting a light emitting substance so that the light emission of each of two or more light emitting substances has a complementary color relationship.
- a luminescent substance that emits light such as R (red), G (green), B (blue), Y (yellow), O (orange), or spectral components of two or more colors of R, G, and B, respectively. It is preferable that two or more of the luminescent substances exhibiting luminescence containing the above are contained. Further, it is preferable to apply a light emitting element having two or more peaks in the spectrum of light emitted from the light emitting element within the wavelength range of the visible light region (for example, 350 nm to 750 nm). Further, the emission spectrum of the material having a peak in the yellow wavelength region is preferably a material having a spectral component also in the green and red wavelength regions.
- the EL layer 115 can have a configuration in which a light emitting layer containing a light emitting material that emits one color and a light emitting layer containing a light emitting material that emits another color are laminated.
- the plurality of light emitting layers in the EL layer 115 may be laminated so as to be in contact with each other, or may be laminated via a region that does not contain any light emitting material.
- a region is provided between the fluorescent light emitting layer and the phosphorescent light emitting layer, which contains the same material as the fluorescent light emitting layer or the phosphorescent light emitting layer (for example, a host material or an assist material) and does not contain any light emitting material. May be good. This facilitates the fabrication of the light emitting element and reduces the drive voltage.
- the light emitting element 120 may be a single element having one EL layer, or may be a tandem element in which a plurality of EL layers are laminated via a charge generation layer.
- the EL layer 115 may be provided in common across each light emitting element 120.
- a continuous EL layer 115 is provided so as to cover the conductive layer 111 of each light emitting element 120.
- the conductive layer 116 may be provided in common across the light emitting element 120R, the light emitting element 120G, and the light emitting element 120B.
- the conductive layer 116 functions as, for example, an electrode to which a common potential is given. If it is provided in common, the manufacturing procedure of the light emitting element 120 can be reduced, which is preferable.
- a conductive layer 114 (referring to the conductive layer 114B, the conductive layer 114G, and the conductive layer 114R) may be provided between the conductive layer 111 and the EL layer 115.
- the conductive layer 114 has a function of transmitting visible light.
- the above-mentioned conductive film having transparency to visible light can be used. Further, as the conductive layer 114, a film obtained by forming the conductive film that reflects visible light thin enough to allow visible light to pass through can be used. Further, by forming a laminated structure of the conductive film and the conductive film that transmits visible light, the conductivity and mechanical strength can be enhanced.
- the conductive layer 114 is arranged between the conductive layer 111 and the EL layer 115.
- the conductive layer 114 is located on the conductive layer 111.
- the EL layer 115 is preferably provided so as to cover the end portion of the conductive layer 114.
- the conductive layer 114 provided in each light emitting element 120 has a different thickness for each light emitting element.
- the conductive layer 114B is the thinnest and the conductive layer 114R is the thickest.
- the distance between the upper surface of the conductive layer 111 and the lower surface of the conductive layer 116 (that is, the interface between the conductive layer 116 and the EL layer 115) in each light emitting element is the largest in the light emitting element 120R and the smallest in the light emitting element 120B.
- the optical distance (optical path length) in each light emitting element can be changed by changing the distance between the upper surface of the conductive layer 111 and the lower surface of the conductive layer 116.
- the light emitting element 120R has the longest optical path length, so it emits light R having the longest wavelength of light.
- the light emitting element 120B since the light emitting element 120B has the shortest optical path length, it emits light B having the shortest wavelength of light enhanced.
- the light emitting element 120G emits light G having an enhanced light having an intermediate wavelength.
- light R can be light with enhanced red light
- light G can be light with enhanced green light
- light B can be light with enhanced blue light.
- the light emitting element 120 can be arranged at an extremely high density. For example, it is possible to realize a display device having a definition exceeding 5000 ppi.
- the optical distance between the surface of the conductive layer 111 that reflects the visible light and the conductive layer 116 that has semitransmission and semireflection with respect to visible light is the wavelength of light for which the intensity is desired to be enhanced. It is preferable that m ⁇ / 2 (m is a natural number, but m is not 0) or its vicinity is adjusted with respect to ⁇ .
- the above-mentioned optical distance is the physical distance between the reflective surface of the conductive layer 111 and the reflective surface of the conductive layer 116 having semitransmissive and semi-reflective properties, and the layer provided between them. Since the product with the refractive index is involved, it is difficult to make a precise adjustment. Therefore, it is preferable to adjust the optical distance by assuming that the surface of the conductive layer 111 and the surface of the conductive layer 116 having semitransmissive and semi-reflective properties are reflective surfaces, respectively.
- the color purity of the light from the light emitting element can be increased by providing the colored layer that overlaps with the light emitting element 120.
- the light emitting element 120 may have a configuration in which a plurality of EL layers are laminated.
- an EL layer 115B having a light emitting substance exhibiting blue light emission, an EL layer 115G having a light emitting substance exhibiting green light emission, and an EL layer 115R having a light emitting substance exhibiting red light emission are laminated. May be configured.
- Each EL layer may have an electron injection layer, an electron transport layer, a charge generation layer, a hole transport layer, a hole injection layer, and the like, in addition to a layer containing a luminescent compound.
- a charge generation layer may be provided between the EL layer 115B and the EL layer 115G. Further, a charge generation layer may be provided between the EL layer 115G and the EL layer 115R.
- the EL layer 115 included in the light emitting element 120 can be composed of a plurality of layers such as layer 4420, light emitting layer 4411, and layer 4430.
- the layer 4420 can include, for example, a layer containing a substance having a high electron injectability (electron injection layer) and a layer containing a substance having a high electron transport property (electron transport layer).
- the light emitting layer 4411 has, for example, a luminescent compound.
- the layer 4430 can have, for example, a layer containing a substance having a high hole injection property (hole injection layer) and a layer containing a substance having a high hole transport property (hole transport layer).
- a configuration having a layer 4420, a light emitting layer 4411 and a layer 4430 provided between a pair of electrodes can function as a single light emitting unit, and the configuration of FIG. 17A is referred to as a single structure in the present specification.
- FIG. 17B is a modification of the EL layer 115 included in the light emitting element 120 shown in FIG. 17A.
- the light emitting element 120 shown in FIG. 17B includes a layer 4430-1 on the conductive layer 111, a layer 4430-2 on the layer 4430-1, a light emitting layer 4411 on the layer 4430-2, and a light emitting layer. It has a layer 4420-1 on the 4411, a layer 4420-2 on the layer 4420-1 and a conductive layer 116 on the layer 4420-2.
- layer 4430-1 functions as a hole injection layer
- layer 4430-2 functions as a hole transport layer
- layer 4420-1 is an electron. It functions as a transport layer
- layer 4420-2 functions as an electron injection layer.
- the conductive layer 111 serves as a cathode and the conductive layer 116 serves as an anode
- the layer 4430-1 functions as an electron injection layer
- the layer 4430-2 functions as an electron transport layer
- the layer 4420-1 transports holes. It functions as a layer
- layer 4420-2 functions as a hole injection layer.
- a configuration in which a plurality of light emitting layers (light emitting layers 4411, 4412, 4413) are provided between the layer 4420 and the layer 4430 is also a variation of the single structure.
- tandem structure a configuration in which a plurality of light emitting units (EL layers 115a and 115b) are connected in series via an intermediate layer (charge generation layer) 4440 is referred to as a tandem structure in the present specification.
- the structure shown in FIG. 17D is referred to as a tandem structure, but the structure is not limited to this, and for example, the tandem structure may be referred to as a stack structure.
- the tandem structure makes it possible to obtain a light emitting element capable of high-luminance light emission.
- the layer 4420 and the layer 4430 may have a laminated structure composed of two or more layers.
- the emission color of the light emitting element can be red, green, blue, cyan, magenta, yellow, white, or the like, depending on the material constituting the EL layer 115. Further, the color purity can be further improved by imparting a microcavity structure to the light emitting element.
- the light emitting element that emits white light has a structure in which the light emitting layer contains two or more kinds of light emitting substances.
- a light emitting substance may be selected so that the light emission of each of the two or more light emitting substances has a complementary color relationship.
- the light emitting layer preferably contains two or more light emitting substances such as R (red), G (green), B (blue), Y (yellow), and O (orange).
- the luminescent substance has two or more, and the luminescence of each luminescent substance contains spectral components of two or more colors among R, G, and B.
- the light emitting element has at least a light emitting layer. Further, as a layer other than the light emitting layer, the light emitting element includes a substance having a high hole injecting property, a substance having a high hole transporting property, a hole blocking material, a substance having a high electron transporting property, an electron blocking material, and a substance having a high electron injecting property. It may further have a layer containing a substance, a bipolar substance (a substance having high electron transport property and hole transport property), and the like.
- Either a low molecular weight compound or a high molecular weight compound can be used as the light emitting device, and an inorganic compound may be contained.
- the layers constituting the light emitting device can be formed by a vapor deposition method (including a vacuum vapor deposition method), a transfer method, a printing method, an inkjet method, a coating method, or the like.
- the light emitting device can be configured to have one or more of a hole injection layer, a hole transport layer, a hole block layer, an electron block layer, an electron transport layer, and an electron injection layer.
- the hole injection layer is a layer that injects holes from the anode into the hole transport layer, and is a layer that contains a material having high hole injection properties.
- the material having high hole injectability include an aromatic amine compound and a composite material containing a hole transporting material and an acceptor material (electron accepting material).
- the hole transport layer is a layer that transports holes injected from the anode to the light emitting layer by the hole injection layer.
- the hole transport layer is a layer containing a hole transport material.
- a hole transporting material a substance having a hole mobility of 1 ⁇ 10-6 cm 2 / Vs or more is preferable. In addition, any substance other than these can be used as long as it is a substance having a higher hole transport property than electrons.
- the hole-transporting material include materials having high hole-transporting properties such as ⁇ -electron-rich heteroaromatic compounds (for example, carbazole derivatives, thiophene derivatives, furan derivatives, etc.) and aromatic amines (compounds having an aromatic amine skeleton). Is preferable.
- the electron transport layer is a layer that transports electrons injected from the cathode to the light emitting layer by the electron injection layer.
- the electron transport layer is a layer containing an electron transport material.
- As the electron transporting material a substance having an electron mobility of 1 ⁇ 10-6 cm 2 / Vs or more is preferable. In addition, any substance other than these can be used as long as it is a substance having a higher electron transport property than holes.
- Examples of the electron-transporting material include a metal complex having a quinoline skeleton, a metal complex having a benzoquinolin skeleton, a metal complex having an oxazole skeleton, a metal complex having a thiazole skeleton, and the like, as well as oxadiazole derivatives, triazole derivatives, and imidazole derivatives.
- ⁇ electron deficiency including oxazole derivative, thiazole derivative, phenanthroline derivative, quinoline derivative having quinoline ligand, benzoquinoline derivative, quinoxalin derivative, dibenzoquinoxaline derivative, pyridine derivative, bipyridine derivative, pyrimidine derivative, and other nitrogen-containing heteroarocyclic compounds
- a material having high electron transport property such as a type heteroarocyclic compound can be used.
- the electron injection layer is a layer for injecting electrons from the cathode into the electron transport layer, and is a layer containing a material having high electron injectability.
- a material having high electron injectability an alkali metal, an alkaline earth metal, or a compound thereof can be used.
- a composite material containing an electron transporting material and a donor material (electron donating material) can also be used.
- Examples of the electron injection layer include lithium, cesium, lithium fluoride (LiF), cesium fluoride (CsF), calcium fluoride (CaF 2 ), 8- (quinolinolato) lithium (abbreviation: Liq), 2- (2). -Pyridyl) phenolatrithium (abbreviation: LiPP), 2- (2-pyridyl) -3-pyridinolatolithium (abbreviation: LiPPy), 4-phenyl-2- (2-pyridyl) phenolatrithium (abbreviation: LiPPP) , Lithium oxide (LiO x ), alkali metals such as cesium carbonate, alkaline earth metals, or compounds thereof can be used.
- a material having electron transportability may be used as the above-mentioned electron injection layer.
- a compound having an unshared electron pair and an electron-deficient heteroaromatic ring can be used as a material having electron transportability.
- a compound having at least one of a pyridine ring, a diazine ring (pyrimidine ring, pyrazine ring, pyridazine ring), and a triazine ring can be used.
- the minimum empty orbital (LUMO: Lowest Unellad Molecular Orbital) of the organic compound having an unshared electron pair is -3.6 eV or more and -2.3 eV or less.
- the highest occupied orbital (HOMO: highest occupied molecular orbital) level and LUMO level of an organic compound are determined by CV (cyclic voltammetry), photoelectron spectroscopy, photoabsorption spectroscopy, backlit electron spectroscopy, etc. Can be estimated.
- BPhen 4,7-diphenyl-1,10-phenanthroline
- NBPhen 2,9-bis (naphthalene-2-yl) -4,7-diphenyl-1,10-phenanthroline
- diquinoxalino [2,3-a: 2', 3'-c] Phenazine (abbreviation: HATNA), 2,4,6-tris [3'-(pyridin-3-yl) biphenyl-3-yl] -1,3 , 5-Triazine (abbreviation: TmPPPyTZ) and the like can be used for organic compounds having unshared electron pairs.
- Tg glass transition temperature
- Tg glass transition temperature
- the light emitting layer is a layer containing a light emitting substance.
- the light emitting layer can have one or more kinds of light emitting substances.
- a substance exhibiting a luminescent color such as blue, purple, bluish purple, green, yellowish green, yellow, orange, and red is appropriately used. Further, as the luminescent substance, a substance that emits near-infrared light can also be used.
- luminescent substances include fluorescent materials, phosphorescent materials, TADF materials, quantum dot materials, and the like.
- fluorescent material examples include pyrene derivatives, anthracene derivatives, triphenylene derivatives, fluorene derivatives, carbazole derivatives, dibenzothiophene derivatives, dibenzofuran derivatives, dibenzoquinoxaline derivatives, quinoxalin derivatives, pyridine derivatives, pyrimidine derivatives, phenanthrene derivatives, naphthalene derivatives and the like. Be done.
- an organic metal complex having a 4H-triazole skeleton, a 1H-triazole skeleton, an imidazole skeleton, a pyrimidine skeleton, a pyrazine skeleton, or a pyridine skeleton (particularly an iridium complex), or a phenylpyridine derivative having an electron-withdrawing group is arranged.
- examples thereof include an organic metal complex (particularly an iridium complex), a platinum complex, and a rare earth metal complex as a ligand.
- the light emitting layer may have one or more kinds of organic compounds (host material, assist material, etc.) in addition to the light emitting substance (guest material).
- organic compounds host material, assist material, etc.
- guest material As one or more kinds of organic compounds, one or both of a hole transporting material and an electron transporting material can be used. Further, a bipolar material or a TADF material may be used as one or more kinds of organic compounds.
- the light emitting layer preferably has, for example, a phosphorescent material and a hole transporting material and an electron transporting material which are combinations that easily form an excitation complex.
- ExTET Exciplex-Triplet Energy Transfer
- a combination that forms an excitation complex that emits light that overlaps the wavelength of the absorption band on the lowest energy side of the luminescent substance energy transfer becomes smooth and light emission can be obtained efficiently.
- high efficiency, low voltage drive, and long life of the light emitting device can be realized at the same time.
- the thin films (insulating film, semiconductor film, conductive film, etc.) constituting the display device include a sputtering method, a chemical vapor deposition (CVD) method, a vacuum vapor deposition method, and a pulsed laser deposition (PLD). ) Method, ALD method, etc. can be used for formation.
- CVD method include a plasma chemical vapor deposition (PECVD: Plasma Enhanced CVD) method and a thermal CVD method.
- PECVD plasma chemical vapor deposition
- thermal CVD there is an organometallic chemical vapor deposition (MOCVD: Metal Organic CVD) method.
- the thin films (insulating film, semiconductor film, conductive film, etc.) that make up the display device include spin coating, dip, spray coating, inkjet, dispense, screen printing, offset printing, doctor knife, slit coating, roll coating, and curtain coating. , Knife coat and the like.
- the thin film constituting the display device when processing the thin film constituting the display device, it can be processed by using a photolithography method or the like.
- the thin film may be processed by a nanoimprint method, a sandblast method, a lift-off method, or the like.
- the island-shaped thin film may be directly formed by a film forming method using a shielding mask such as a metal mask.
- photolithography methods There are typically the following two methods as photolithography methods.
- One is a method of forming a resist mask on a thin film to be processed, processing the thin film by etching or the like, and removing the resist mask.
- the other is a method in which a photosensitive thin film is formed and then exposed and developed to process the thin film into a desired shape.
- the light used for exposure for example, i-line (wavelength 365 nm), g-line (wavelength 436 nm), h-line (wavelength 405 nm), or a mixture of these can be used.
- ultraviolet rays, KrF laser light, ArF laser light, or the like can also be used.
- the exposure may be performed by the immersion exposure technique.
- extreme ultraviolet light EUV: Extreme Ultra-violet
- X-rays may be used as the light used for exposure.
- an electron beam can be used instead of the light used for exposure. It is preferable to use extreme ultraviolet light, X-rays, or an electron beam because extremely fine processing is possible.
- extreme ultraviolet light, X-rays, or an electron beam because extremely fine processing is possible.
- a dry etching method, a wet etching method, a sandblasting method, etc. can be used for etching the thin film.
- FIG. 1B An example of a method for manufacturing the display device shown in FIG. 1B will be described with reference to FIGS. 5A to 5D and FIGS. 6A to 6D.
- the EL layer 115 and the conductive layer 116 can be processed without using a metal mask.
- a substrate having at least enough heat resistance to withstand the subsequent heat treatment can be used.
- an insulating substrate examples thereof include a glass substrate, a quartz substrate, a sapphire substrate, and a ceramic substrate.
- a single crystal semiconductor substrate made of silicon, silicon carbide or the like, a polycrystalline semiconductor substrate, a compound semiconductor substrate such as silicon germanium, or a semiconductor substrate such as an SOI substrate can be used.
- the substrate 101 it is preferable to use a substrate in which a semiconductor circuit including a semiconductor element such as a transistor is formed on the semiconductor substrate or an insulating substrate.
- a semiconductor element may be formed of a semiconductor substrate such as a single crystal silicon substrate, or may be formed of an oxide semiconductor film.
- the semiconductor circuit preferably comprises, for example, a pixel circuit, a gate line drive circuit (gate driver), a source line drive circuit (source driver), and the like.
- an arithmetic circuit, a storage circuit, and the like may be configured.
- a substrate having at least a pixel circuit is used as the substrate 101.
- An insulating layer 121 is formed on the substrate 101 (see FIG. 5A).
- the insulating layer 121 can be appropriately formed by using the above-mentioned insulating material and the film forming method.
- the insulating layer 122 may be formed on the insulating layer 121.
- the insulating layer 122 can be appropriately formed by using the above-mentioned insulating material and the film forming method.
- a material having a low etching rate for the insulating layer 122 it can function as an etching stopper when forming the conductive layer 111, the EL layer 115, and the conductive layer 116.
- a conductive film is formed on the insulating layer 121 and the plug 131.
- the conductive film is processed into an island shape to form a conductive layer 111 (see FIG. 5B).
- the conductive layer 111 is electrically connected to the plug 131.
- a recess may be formed in a region of the insulating layer 121 that does not overlap with the conductive layer 111.
- the EL layer 115Bf and the conductive layer 116f of the light emitting element 120B are sequentially formed on the conductive layer 111 and the insulating layer 121.
- a pattern using the resist RES1 is formed on the conductive layer 116f (see FIG. 5C).
- the EL layer 115Bf is a layer that becomes the EL layer 115B in a later process.
- the conductive layer 116f is a layer that becomes the conductive layer 116 in a later step.
- the EL layer 115Bf, the EL layer 115Gf to be formed later, and the EL layer 115Rf may be collectively referred to as the EL layer 115f.
- the EL layer 115f has a layer containing at least a luminescent compound.
- the electron injection layer, the electron transport layer, the charge generation layer, the hole transport layer, and the hole injection layer may be laminated.
- the EL layer 115f can be formed by a liquid phase method such as a vapor deposition method or an inkjet method.
- the conductive layer 116f is formed so as to have transparency and reflectivity with respect to visible light.
- a metal film or an alloy film thin enough to transmit visible light can be used.
- a light-transmitting conductive film for example, a metal oxide film
- a metal oxide film may be laminated on such a film.
- etching is performed using the resist RES1 as a mask to form the conductive layer 116 and the EL layer 115B in this order, and then the resist RES1 is removed (see FIG. 5D).
- the EL layer 115Bf when the EL layer 115Bf is etched, chlorine or the like used in the etching gas may adhere to the side surface of the EL layer 115B. Further, by removing the resist RES1 after forming the conductive layer 116 and the EL layer 115B, or by exposing the conductive layer 116 and the EL layer 115B to the atmosphere, impurities such as water or oxygen are adsorbed on the side surfaces of the EL layer 115B. In some cases. This also applies to the EL layer 115G and the EL layer 115R, which will be described later.
- the EL layer 115Gf and the conductive layer 116f of the light emitting element 120G are sequentially formed on the conductive layer 111, the insulating layer 121, and the conductive layer 116 of the light emitting element 120B.
- a pattern using the resist RES2 is formed on the conductive layer 116f (see FIG. 6A).
- the EL layer 115Gf is a layer that becomes the EL layer 115G in a later step.
- etching is performed using the resist RES2 as a mask to form the conductive layer 116 and the EL layer 115G in this order, and then the resist RES2 is removed.
- the EL layer 115Rf of the light emitting element 120R and the conductive layer 116f are sequentially formed on the conductive layer 111, the insulating layer 121, the conductive layer 116 of the light emitting element 120B, and the conductive layer 116 of the light emitting element 120G.
- a pattern using the resist RES3 is formed on the conductive layer 116f (see FIG. 6B).
- the EL layer 115Rf is a layer that becomes the EL layer 115R in a later step.
- etching is performed using the resist RES3 as a mask to form the conductive layer 116 and the EL layer 115R in this order, and then the resist RES3 is removed (see FIG. 6C).
- the EL layer 115 and the conductive layer 116 are formed after the conductive layer 111 is formed, but the present invention is not limited to this.
- a layer to be a conductive layer 111, an EL layer 115f, and a conductive layer 116f are formed in this order and collectively processed into an island shape to form the conductive layer 111, the EL layer 115, and the conductive layer 116. You can also.
- the EL layer 115f and the conductive layer 116f are continuously formed in each light emitting element 120, but the present invention is not limited to this.
- the conductive layer 116 may be formed after forming only the EL layer 115 by the same method as shown in FIGS. 5C to 6C. In this case, the conductive layer 116 can be processed so as to be continuous without being divided by the light emitting element 120B, the light emitting element 120G, and the light emitting element 120R.
- the conductive layer 116 may be formed with the other part of the EL layer 115.
- the electron injection layer of the EL layer 115 and the conductive layer 116 may be formed later.
- the electron injection layer and the conductive layer 116 of the EL layer 115 can be processed so as to be continuous without being divided by the light emitting element 120B, the light emitting element 120G, and the light emitting element 120R.
- an inorganic film that functions as a sacrificial layer between the EL layer 115f and the resist so that the resist does not come into direct contact with the EL layer 115f.
- an inorganic film that functions as a sacrificial layer is provided on the layer 4420-1 that functions as an electron transport layer, and a resist is provided on the layer 4420-1.
- the layer 4430-2, the light emitting layer 4411, and the layer 4420-1 may be etched.
- the insulating layer 124 is formed on the insulating layer 121 and the conductive layer 116 (see FIG. 6D).
- the insulating layer 124 can be appropriately formed by using the above-mentioned insulating material and the film forming method.
- the film formation temperature of the insulating layer 124 is preferably in a range in which the EL layer 115 does not deteriorate, and may be, for example, room temperature or higher and 100 ° C. or lower.
- FIGS. 7A to 7C are enlarged views corresponding to the region A of FIG. 6D.
- the insulating layer 121, the conductive layer 111, the EL layer 115, and the conductive layer 116 are covered to form a film of the layer 124a (see FIG. 7A).
- the layer 124a can be appropriately formed by using the above-mentioned insulating material and the film forming method.
- aluminum oxide may be formed by using a sputtering method.
- the layer 124a is covered to form a film of the layer 124b (see FIG. 7B).
- the layer 124b can be appropriately formed by using the above-mentioned insulating material and the film forming method.
- silicon nitride may be formed by using a sputtering method.
- the layer 124c is formed by covering the layer 124b (see FIG. 7C).
- the layer 124c can be appropriately formed by using the above-mentioned insulating material and the film forming method.
- aluminum oxide may be deposited using the ALD method.
- impurities such as water or oxygen or impurities such as chlorine used in the etching adhere to the side surfaces of the light emitting element 120, particularly the EL layer 115B, the EL layer 115G, and the EL layer 115R. In some cases.
- impurities such as water or oxygen or impurities such as chlorine used in the etching adhere to the side surfaces of the light emitting element 120, particularly the EL layer 115B, the EL layer 115G, and the EL layer 115R. In some cases.
- the insulating layer 124 as described above, these impurities can be captured or fixed by the layer 124a. As a result, it is possible to prevent the formation of a different layer due to these impurities on the side surface of the EL layer 115, and to improve the reliability of the light emitting element 120.
- the display device 100 having the light emitting element 120R, the light emitting element 120G, and the light emitting element 120B can be formed.
- FIG. 8A is a schematic cross-sectional view of the display device 200A.
- the display device 200A includes a substrate 201, a light emitting element 120R, a light emitting element 120G, a light emitting element 120B, a capacitance element 240, a transistor 210, and the like.
- the laminated structure from the substrate 201 to the capacitance element 240 corresponds to the substrate 101 in the above configuration example 1.
- the transistor 210 is a transistor in which a channel forming region is formed on the substrate 201.
- a semiconductor substrate such as a single crystal silicon substrate can be used.
- the transistor 210 has a part of the substrate 201, a conductive layer 211, a low resistance region 212, an insulating layer 213, an insulating layer 214, and the like.
- the conductive layer 211 functions as a gate electrode.
- the insulating layer 213 is located between the substrate 201 and the conductive layer 211, and functions as a gate insulating layer.
- the low resistance region 212 is a region where the substrate 201 is doped with impurities and functions as either a source or a drain.
- the insulating layer 214 is provided so as to cover the side surface of the conductive layer 211 and functions as an insulating layer.
- an element separation layer 215 is provided between two adjacent transistors 210 so as to be embedded in the substrate 201.
- an insulating layer 261 is provided so as to cover the transistor 210, and a capacitance element 240 is provided on the insulating layer 261.
- the capacitive element 240 has a conductive layer 241 and a conductive layer 242, and an insulating layer 243 located between them.
- the conductive layer 241 functions as one electrode of the capacitive element 240
- the conductive layer 242 functions as the other electrode of the capacitive element 240
- the insulating layer 243 functions as a dielectric of the capacitive element 240.
- the conductive layer 241 is provided on the insulating layer 261 and is electrically connected to one of the source and drain of the transistor 210 by a plug 271 embedded in the insulating layer 261.
- the insulating layer 243 is provided so as to cover the conductive layer 241.
- the conductive layer 242 is provided in a region overlapping the conductive layer 241 via an insulating layer 243.
- An insulating layer 121 is provided so as to cover the capacitance element 240, and a light emitting element 120R, a light emitting element 120G, a light emitting element 120B, and the like are provided on the insulating layer 121.
- a light emitting element 120R, a light emitting element 120G, a light emitting element 120B, and the like are provided on the insulating layer 121.
- FIG. 1A an example using the configuration illustrated in FIG. 1A is shown as the configuration of the light emitting element 120R, the light emitting element 120G, the light emitting element 120B, and the like, but the present invention is not limited to this, and various configurations exemplified above are applied. be able to.
- the insulating layer 124, the insulating layer 162, and the insulating layer 163 are provided in this order so as to cover the conductive layer 116 of the light emitting element 120.
- These three insulating layers function as protective layers that prevent impurities such as water from diffusing into the light emitting element 120. It is preferable to use an inorganic insulating film having low moisture permeability, such as a silicon oxide film, a silicon nitride film, or an aluminum oxide film, for the insulating layer 163. Further, an organic insulating film having high translucency can be used for the insulating layer 162.
- the influence of the uneven shape below the insulating layer 162 can be alleviated, and the surface to be formed of the insulating layer 163 can be made a smooth surface. As a result, defects such as pinholes are less likely to occur in the insulating layer 163, so that the moisture permeability of the protective layer can be further improved.
- the structure of the protective layer covering the light emitting element 120 is not limited to this, and may be a single layer or a two-layer structure, or a laminated structure of four or more layers.
- the insulating layer 124 As shown in the above configuration example, it is possible to suppress the diffusion of impurities such as water and oxygen into the light emitting element 120.
- the display device 200A has a substrate 202 on the visual side.
- the substrate 202 and the substrate 201 are bonded to each other by a translucent adhesive layer 164.
- a translucent substrate such as a glass substrate, a quartz substrate, a sapphire substrate, or a plastic substrate can be used.
- the colored layer 165R, the colored layer 165G, and the colored layer 165B as shown in FIG. 8B.
- a colored layer 165R that overlaps the light emitting element 120R, a colored layer 165G that overlaps the light emitting element 120G, and a colored layer 165B that overlaps the light emitting element 120B are provided.
- the colored layer 165R transmits red light
- the colored layer 165G transmits green light
- the colored layer 165B transmits blue light.
- each colored layer on the insulating layer 163, the positioning of each light emitting unit and each colored layer is easier and extremely high as compared with the case where the colored layer is formed on the substrate 202 described later.
- a fine display device can be realized. Not limited to the above, even when the light emitting element is divided into red light emitting, green light emitting, and blue light emitting, the colored layer 165R, the colored layer 165G, and the colored layer 165B may be provided.
- FIG. 9 is a schematic cross-sectional view of the display device 200B.
- the display device 200B is mainly different from the display device 200A in that the transistor configuration is different.
- the transistor 220 is a transistor in which a metal oxide (also referred to as an oxide semiconductor) is applied to a semiconductor layer on which a channel is formed.
- a metal oxide also referred to as an oxide semiconductor
- the transistor 220 has a semiconductor layer 221, an insulating layer 223, a conductive layer 224, a pair of conductive layers 225, an insulating layer 226, a conductive layer 227, and the like.
- the above-mentioned insulating substrate or semiconductor substrate can be used as the substrate 201 on which the transistor 220 is provided.
- An insulating layer 232 is provided on the substrate 201.
- the insulating layer 232 functions as a barrier layer that prevents impurities such as water or hydrogen from diffusing from the substrate 201 into the transistor 220 and desorption of oxygen from the semiconductor layer 221 to the insulating layer 232 side.
- a film such as an aluminum oxide film, a hafnium oxide film, or a silicon nitride film, in which hydrogen or oxygen is less likely to diffuse than the silicon oxide film, can be used.
- a conductive layer 227 is provided on the insulating layer 232, and an insulating layer 226 is provided so as to cover the conductive layer 227.
- the conductive layer 227 functions as a first gate electrode of the transistor 220, and a part of the insulating layer 226 functions as a first gate insulating layer. It is preferable to use an oxide insulating film such as a silicon oxide film at least in the portion of the insulating layer 226 in contact with the semiconductor layer 221.
- the upper surface of the insulating layer 226 is preferably flattened.
- the semiconductor layer 221 is provided on the insulating layer 226.
- the semiconductor layer 221 preferably has a metal oxide (also referred to as an oxide semiconductor) film having semiconductor characteristics. Details of the materials that can be suitably used for the semiconductor layer 221 will be described later.
- the pair of conductive layers 225 are provided in contact with the semiconductor layer 221 and function as a source electrode and a drain electrode.
- the insulating layer 228 is provided so as to cover the upper surface and the side surface of the pair of conductive layers 225, the side surface of the semiconductor layer 221 and the like, and the insulating layer 261b is provided on the insulating layer 228.
- the insulating layer 228 functions as a barrier layer that prevents impurities such as water and hydrogen from diffusing from the insulating layer 261b and the like into the semiconductor layer 221 and oxygen from being desorbed from the semiconductor layer 221.
- the same insulating film as the insulating layer 232 can be used as the insulating layer 232.
- the insulating layer 228 and the insulating layer 261b are provided with openings that reach the semiconductor layer 221. Inside the opening, the insulating layer 261b, the insulating layer 228, the side surfaces of the conductive layer 225, the insulating layer 223 in contact with the upper surface of the semiconductor layer 221 and the conductive layer 224 are embedded.
- the conductive layer 224 functions as a second gate electrode, and the insulating layer 223 functions as a second gate insulating layer.
- the upper surface of the conductive layer 224, the upper surface of the insulating layer 223, and the upper surface of the insulating layer 261b are flattened so that their heights are substantially the same, and the insulating layer 229 and the insulating layer 261a are provided to cover them. ..
- the insulating layer 261a and the insulating layer 261b function as an interlayer insulating layer. Further, the insulating layer 229 functions as a barrier layer for preventing impurities such as water and hydrogen from diffusing into the transistor 220 from the insulating layer 261a and the like. As the insulating layer 229, the same insulating film as the insulating layer 228 and the insulating layer 232 can be used.
- the plug 271 electrically connected to one of the pair of conductive layers 225 is provided so as to be embedded in the insulating layer 261a, the insulating layer 229, and the insulating layer 261b.
- the plug 271 is a conductive layer 271a and a conductive layer 271a that cover the side surfaces of the openings of the insulating layer 261a, the insulating layer 261b, the insulating layer 229, and the insulating layer 228, and a part of the upper surface of the conductive layer 225. It is preferable to have a conductive layer 271b in contact with the upper surface. At this time, it is preferable to use a conductive material as the conductive layer 271a in which hydrogen and oxygen are difficult to diffuse.
- the insulating layer 122 or the insulating layer 124 as shown in the previous embodiment, it is possible to suppress the diffusion of impurities such as water or hydrogen into the transistor 220. As a result, the electrical characteristics and reliability of the transistor 220 can be improved.
- FIG. 10 is a schematic cross-sectional view of the display device 200C.
- the display device 200C has a configuration in which a transistor 210 having a channel formed on the substrate 201 and a transistor 220 containing a metal oxide are laminated on a semiconductor layer on which the channel is formed.
- An insulating layer 261 is provided so as to cover the transistor 210, and a conductive layer 251 is provided on the insulating layer 261. Further, an insulating layer 262 is provided so as to cover the conductive layer 251, and a conductive layer 252 is provided on the insulating layer 262. The conductive layer 251 and the conductive layer 252 each function as wiring. Further, an insulating layer 263 and an insulating layer 232 are provided so as to cover the conductive layer 252, and a transistor 220 is provided on the insulating layer 232. Further, an insulating layer 265 is provided so as to cover the transistor 220, and a capacitance element 240 is provided on the insulating layer 265. The capacitive element 240 and the transistor 220 are electrically connected by a plug 274.
- the transistor 220 can be used as a transistor constituting a pixel circuit. Further, the transistor 210 can be used as a transistor constituting a pixel circuit or a transistor constituting a drive circuit (gate line drive circuit, source line drive circuit) for driving the pixel circuit. Further, the transistor 210 and the transistor 220 can be used as transistors constituting various circuits such as an arithmetic circuit or a storage circuit.
- FIG. 11 is a schematic cross-sectional view of the display device 200D.
- the display device 200D is mainly different from the display device 200C in that two transistors to which an oxide semiconductor is applied are laminated.
- the display device 200D has a transistor 230 between the transistor 210 and the transistor 220.
- the transistor 230 has the same configuration as the transistor 220 except that it does not have a first gate electrode.
- the transistor 230 may be configured to have a first gate electrode.
- An insulating layer 263 and an insulating layer 231 are provided so as to cover the conductive layer 252, and a transistor 230 is provided on the insulating layer 231.
- the transistor 230 and the conductive layer 252 are electrically connected to each other via a plug 273, a conductive layer 253, and a plug 272.
- an insulating layer 264 and an insulating layer 232 are provided so as to cover the conductive layer 253, and a transistor 220 is provided on the insulating layer 232.
- the transistor 220 functions as a transistor for controlling the current flowing through the light emitting element 120.
- the transistor 230 functions as a selection transistor for controlling the selection state of the pixel.
- the transistor 210 functions as a transistor or the like that constitutes a drive circuit for driving a pixel.
- the transistor has a conductive layer that functions as a gate electrode, a semiconductor layer, a conductive layer that functions as a source electrode, a conductive layer that functions as a drain electrode, and an insulating layer that functions as a gate insulating layer.
- the transistor structure of the display device is not particularly limited.
- it may be a planar type transistor, a stagger type transistor, or an inverted stagger type transistor.
- a top gate type or a bottom gate type transistor structure may be used.
- gate electrodes may be provided above and below the channel.
- the crystallinity of the semiconductor material used for the transistor is also not particularly limited, and either an amorphous semiconductor or a semiconductor having crystallinity (microcrystal semiconductor, polycrystalline semiconductor, single crystal semiconductor, or semiconductor having a partially crystalline region). May be used. It is preferable to use a semiconductor having crystallinity because deterioration of transistor characteristics can be suppressed.
- a metal oxide having an energy gap of 2 eV or more, preferably 2.5 eV or more, more preferably 3 eV or more can be used.
- a typical example is a metal oxide containing indium, and for example, CAC-OS, which will be described later, can be used.
- Transistors using metal oxides with a wider bandgap and lower carrier density than silicon retain the charge accumulated in the capacitive element connected in series with the transistor for a long period of time due to its low off-current. It is possible.
- the semiconductor layer is represented by an In-M-Zn-based oxide containing, for example, indium, zinc and M (M is a metal such as aluminum, titanium, gallium, germanium, ittrium, zirconium, lanthanum, cerium, tin, neodymium or hafnium). It can be a film to be made.
- M is a metal such as aluminum, titanium, gallium, germanium, ittrium, zirconium, lanthanum, cerium, tin, neodymium or hafnium.
- the metal oxide constituting the semiconductor layer is an In-M-Zn-based oxide
- the atomic number ratio of the metal element of the sputtering target used for forming the In-M-Zn oxide is In ⁇ M, Zn. It is preferable that ⁇ M is satisfied.
- the atomic number ratio of the semiconductor layer to be formed includes a variation of plus or minus 40% of the atomic number ratio of the metal element contained in the sputtering target.
- the semiconductor layer a metal oxide film having a low carrier density is used.
- the semiconductor layer has a carrier density of 1 ⁇ 10 17 / cm 3 or less, preferably 1 ⁇ 10 15 / cm 3 or less, more preferably 1 ⁇ 10 13 / cm 3 or less, and more preferably 1 ⁇ 10 11 / cm.
- Metal oxides having a carrier density of 3 or less, more preferably less than 1 ⁇ 10 10 / cm 3 and a carrier density of 1 ⁇ 10 -9 / cm 3 or more can be used.
- Such metal oxides are referred to as high-purity intrinsic or substantially high-purity intrinsic metal oxides. It can be said that the oxide semiconductor is a metal oxide having a low defect level density and stable characteristics.
- an oxide semiconductor having an appropriate composition may be used according to the required semiconductor characteristics and electrical characteristics (field effect mobility, threshold voltage, etc.) of the transistor. Further, in order to obtain the required semiconductor characteristics of the transistor, it is preferable that the carrier density, impurity concentration, defect density, atomic number ratio of metal element and oxygen, interatomic distance, density and the like of the semiconductor layer are appropriate. ..
- the concentration of silicon or carbon in the semiconductor layer is set to 2 ⁇ 10 18 atoms / cm 3 or less, preferably 2 ⁇ 10 17 atoms / cm 3 or less.
- the concentration of the alkali metal or alkaline earth metal obtained by the secondary ion mass spectrometry in the semiconductor layer is set to 1 ⁇ 10 18 atoms / cm 3 or less, preferably 2 ⁇ 10 16 atoms / cm 3 or less.
- the nitrogen concentration obtained by the secondary ion mass spectrometry in the semiconductor layer is preferably 5 ⁇ 10 18 atoms / cm 3 or less.
- hydrogen contained in an oxide semiconductor reacts with oxygen bonded to a metal atom to become water, which may form an oxygen deficiency.
- oxygen deficiency When hydrogen enters the oxygen deficiency, electrons that are carriers may be generated.
- a part of hydrogen may be combined with oxygen that is bonded to a metal atom to generate an electron as a carrier. Therefore, a transistor using an oxide semiconductor containing hydrogen tends to have a normally-on characteristic. Therefore, it is preferable that hydrogen in the channel forming region of the oxide semiconductor is reduced as much as possible.
- the hydrogen concentration obtained by the secondary ion mass spectrometry is less than 1 ⁇ 10 20 atoms / cm 3 , preferably less than 5 ⁇ 10 19 atoms / cm 3 . It is preferably less than 1 ⁇ 10 19 atoms / cm 3 , more preferably less than 5 ⁇ 10 18 atoms / cm 3 , and even more preferably less than 1 ⁇ 10 18 atoms / cm 3 .
- Oxide semiconductors are divided into single crystal oxide semiconductors and non-single crystal oxide semiconductors.
- Examples of the non-single crystal oxide semiconductor include CAAC-OS (c-axis-aligned cristalline oxide semiconductor), polycrystalline oxide semiconductor, nc-OS (nanocrystalline oxide semiconductor), and pseudoamorphous oxide semiconductor (a-like). : Amorphous-like oxide semiconductor), amorphous oxide semiconductors, and the like.
- CAC-OS cloud-aligned complex oxide semiconductor
- CAC-OS cloud-aligned complex oxide semiconductor
- the above-mentioned non-single crystal oxide semiconductor can be preferably used. Further, as the non-single crystal oxide semiconductor, nc-OS or CAAC-OS can be preferably used.
- CAC-OS As the semiconductor layer of the transistor, it is preferable to use CAC-OS as the semiconductor layer of the transistor.
- CAC-OS high electrical characteristics or high reliability can be imparted to the transistor.
- Two or more types of semiconductor layers are included in the CAAC-OS region, the polycrystalline oxide semiconductor region, the nc-OS region, the pseudo-amorphous oxide semiconductor region, and the amorphous oxide semiconductor region. It may be a mixed film having.
- the mixed film may have, for example, a single-layer structure or a laminated structure including any two or more of the above-mentioned regions.
- CAC-OS configuration ⁇ CAC-OS configuration>
- the configuration of the CAC-OS that can be used for the transistor disclosed in one aspect of the present invention will be described.
- CAC-OS is, for example, a composition of a material in which elements constituting a metal oxide are unevenly distributed in a size of 0.5 nm or more and 10 nm or less, preferably 1 nm or more and 2 nm or less, or a size close thereto.
- the metal oxide one or more metal elements are unevenly distributed, and the region having the metal element is 0.5 nm or more and 10 nm or less, preferably 1 nm or more and 2 nm or less, or a size in the vicinity thereof.
- the state of being mixed with is also called a mosaic shape or a patch shape.
- the metal oxide preferably contains at least indium. In particular, it preferably contains indium and zinc. Also, in addition to them, aluminum, gallium, yttrium, copper, vanadium, beryllium, boron, silicon, titanium, iron, nickel, germanium, zirconium, molybdenum, lantern, cerium, neodymium, hafnium, tantalum, tungsten, or magnesium, etc. One or more selected from the above may be included.
- CAC-OS in In-Ga-Zn oxide is indium oxide (hereinafter, InO).
- InO indium oxide
- X1 is a real number larger than 0
- In X2 Zn Y2 O Z2 X2, Y2, and Z2 are real numbers larger than 0
- GaO X3 (X3 is a real number larger than 0)
- gallium zinc oxide hereinafter, Ga X4 Zn Y4 O Z4 (X4, Y4, and Z4 are real numbers larger than 0)
- the material is separated into a mosaic-like structure, and the mosaic-like InO X1 or In X2 Zn Y2 O Z2 is uniformly distributed in the film (hereinafter, also referred to as cloud-like).
- CAC-OS is a composite metal oxide having a structure in which a region containing GaO X3 as a main component and a region containing In X2 Zn Y2 O Z2 or InO X1 as a main component are mixed.
- the atomic number ratio of In to the element M in the first region is larger than the atomic number ratio of In to the element M in the second region. It is assumed that the concentration of In is higher than that of region 2.
- IGZO is a common name, and may refer to one compound consisting of In, Ga, Zn, and O.
- InGaO 3 (ZnO) m1 (m1 is a natural number, but m1 is not 0), or In (1 + x0) Ga (1-x0) O 3 (ZnO) m0 (-1 ⁇ x0 ⁇ 1, A crystalline compound represented by (m0 is an arbitrary number) can be mentioned.
- the crystalline compound has a single crystal structure, a polycrystalline structure, or a CAAC structure.
- the CAAC structure is a crystal structure in which a plurality of IGZO nanocrystals have a c-axis orientation and are connected without being oriented on the ab plane.
- CAC-OS relates to the material composition of metal oxides.
- CAC-OS is a region that is partially observed as nanoparticles containing Ga as a main component and nanoparticles containing In as a main component in a material composition containing In, Ga, Zn, and O. The regions observed in the shape are randomly dispersed in a mosaic pattern. Therefore, in CAC-OS, the crystal structure is a secondary element.
- CAC-OS does not include a laminated structure of two or more types of films having different compositions. For example, it does not include a structure consisting of two layers, a film containing In as a main component and a film containing Ga as a main component.
- CAC-OS has a region observed in the form of nanoparticles containing the metal element as a main component and a nano having In as a main component in a part.
- the regions observed in the form of particles refer to a configuration in which the regions are randomly dispersed in a mosaic pattern.
- CAC-OS can be formed by a sputtering method, for example, under the condition that the substrate is not heated.
- a sputtering method one or more selected from an inert gas (typically argon), an oxygen gas, and a nitrogen gas may be used as the film forming gas. good.
- the lower the flow rate ratio of the oxygen gas to the total flow rate of the film-forming gas at the time of film formation is preferable.
- the flow rate ratio of the oxygen gas is preferably 0% or more and less than 30%, preferably 0% or more and 10% or less. ..
- CAC-OS is characterized by the fact that no clear peak is observed when measured using the ⁇ / 2 ⁇ scan by the Out-of-plane method, which is one of the X-ray diffraction (XRD) measurement methods. Have. That is, from the X-ray diffraction measurement, it can be seen that the orientation of the measurement region in the ab plane direction and the c-axis direction is not observed.
- XRD X-ray diffraction
- CAC-OS has a ring-shaped region having high brightness and a ring-shaped region having high brightness in an electron beam diffraction pattern obtained by irradiating an electron beam having a probe diameter of 1 nm (also referred to as a nanobeam electron beam). Multiple bright spots are observed. Therefore, from the electron diffraction pattern, it can be seen that the crystal structure of CAC-OS has an nc (nano-crystal) structure having no orientation in the planar direction and the cross-sectional direction.
- a region in which GaO X3 is a main component is obtained by EDX mapping acquired by using energy dispersive X-ray spectroscopy (EDX). And, it can be confirmed that the region in which In X2 Zn Y2 O Z2 or InO X1 is the main component is unevenly distributed and has a mixed structure.
- EDX energy dispersive X-ray spectroscopy
- CAC-OS has a structure different from that of the IGZO compound in which metal elements are uniformly distributed, and has properties different from those of the IGZO compound. That is, the CAC-OS is a region in which GaO X3 or the like is the main component and a region in which In X2 Zn Y2 O Z2 or InO X1 is the main component are phase-separated from each other and each element is the main component. Has a mosaic-like structure.
- the region in which In X2 Zn Y2 O Z2 or InO X1 is the main component is a region having higher conductivity than the region in which GaO X3 or the like is the main component. That is, when the carrier flows through the region where In X2 Zn Y2 O Z2 or InO X1 is the main component, conductivity as a metal oxide is exhibited. Therefore, a high field effect mobility ( ⁇ ) can be realized by distributing the region containing In X2 Zn Y2 O Z2 or InO X1 as the main component in the metal oxide in a cloud shape.
- the region in which GaO X3 or the like is the main component is a region having higher insulating property than the region in which In X2 Zn Y2 O Z2 or InO X1 is the main component. That is, since the region containing GaO X3 or the like as the main component is distributed in the metal oxide, the leakage current can be suppressed and a good switching operation can be realized.
- CAC-OS when CAC-OS is used for a semiconductor element, the insulation property caused by GaO X3 and the like and the conductivity caused by In X2 Zn Y2 O Z2 or InO X1 act complementarily to be high. On -current (Ion) and high field effect mobility ( ⁇ ) can be achieved.
- CAC-OS is most suitable for various semiconductor devices such as displays.
- a transistor having CAC-OS in the semiconductor layer has high field effect mobility and high drive capability
- the transistor can be used in a drive circuit, typically a scanning line drive circuit that generates a gate signal.
- a display device having a narrow frame width (also referred to as a narrow frame) can be provided. Further, by using the transistor in the signal line drive circuit of the display device (particularly, the demultiplexer connected to the output terminal of the shift register of the signal line drive circuit), the number of wires connected to the display device is small.
- a display device can be provided.
- a transistor having CAC-OS in the semiconductor layer does not require a laser crystallization step, unlike a transistor using low-temperature polysilicon. Therefore, it is possible to reduce the manufacturing cost even for a display device using a large area substrate. Furthermore, in high resolution such as Ultra Hi-Vision (“4K resolution”, “4K2K”, “4K”) and Super Hi-Vision (“8K resolution”, “8K4K”, “8K”), semiconductors are used in large display devices. By using a transistor having CAC-OS in the layer for the drive circuit and the display unit, it is possible to write in a short time and reduce display defects, which is preferable.
- silicon may be used for the semiconductor in which the transistor channel is formed.
- Amorphous silicon may be used as the silicon, but it is particularly preferable to use silicon having crystallinity.
- polysilicon can be formed at a lower temperature than single crystal silicon, and has higher field effect mobility and higher reliability than amorphous silicon.
- Conductive layer Materials that can be used for conductive layers such as transistor gates, sources and drains, as well as various wirings and electrodes that make up display devices include aluminum, titanium, chromium, nickel, copper, yttrium, zirconium, molybdenum, and silver. Examples include tantalum, a metal such as tungsten, or an alloy containing this as a main component. Further, a film containing these materials can be used as a single layer or as a laminated structure.
- a single-layer structure of an aluminum film containing silicon a two-layer structure in which an aluminum film is laminated on a titanium film, a two-layer structure in which an aluminum film is laminated on a tungsten film, and a copper film on a copper-magnesium-aluminum alloy film.
- Two-layer structure for laminating two-layer structure for laminating a copper film on a titanium film, two-layer structure for laminating a copper film on a tungsten film, a titanium film or a titanium nitride film, and an aluminum film or a copper film on top of it.
- An oxide such as indium oxide, tin oxide or zinc oxide may be used. Further, it is preferable to use copper containing manganese because the controllability of the shape by etching is improved.
- Examples of the insulating material that can be used for each insulating layer include resins having a siloxane bond such as acrylic resin and epoxy resin, and resins having a siloxane bond such as silicone, as well as silicon oxide, silicon oxide nitride, silicon nitride oxide, silicon nitride, and oxidation. Inorganic insulating materials such as aluminum can also be used.
- the oxidative nitride refers to a material having a higher oxygen content than nitrogen as its composition
- the nitride oxide refers to a material having a higher nitrogen content than oxygen as its composition.
- the description of silicon oxide refers to a material having a higher oxygen content than nitrogen as its composition
- the description of silicon nitride refers to a material having a higher nitrogen content than oxygen as its composition. Is shown.
- the light emitting element is provided between a pair of insulating films having low water permeability. As a result, it is possible to prevent impurities such as water from entering the light emitting element, and it is possible to suppress a decrease in the reliability of the device.
- the insulating film having low water permeability examples include a film containing nitrogen and silicon such as a silicon nitride film and a silicon oxide film, and a film containing nitrogen and aluminum such as an aluminum nitride film. Further, a silicon oxide film, a silicon nitride film, an aluminum oxide film or the like may be used.
- the amount of water vapor permeated by an insulating film having low water permeability is 1 ⁇ 10-5 [g / ( m2 ⁇ day)] or less, preferably 1 ⁇ 10-6 [g / ( m2 ⁇ day)] or less. It is more preferably 1 ⁇ 10-7 [g / ( m2 ⁇ day)] or less, and further preferably 1 ⁇ 10-8 [g / ( m2 ⁇ day)] or less.
- Display module configuration example Hereinafter, a configuration example of a display module having the display device according to one aspect of the present invention will be described.
- FIG. 12A is a schematic perspective view of the display module 280.
- the display module 280 includes a display device 200 and an FPC 290.
- As the display device 200 each display device (display device 200A to display device 200D) illustrated in the above configuration example 2 can be applied.
- the display module 280 has a substrate 201 and a substrate 202. Further, the display unit 281 is provided on the substrate 202 side. The display unit 281 is an area for displaying an image in the display module 280, and is an area in which light from each pixel provided in the pixel unit 284, which will be described later, can be visually recognized. Further, the display module 280 may have a source driver IC 290b.
- FIG. 12B shows a perspective view schematically showing the configuration on the substrate 201 side.
- the substrate 201 has a configuration in which a circuit unit 282, a pixel circuit unit 283 on the circuit unit 282, and a pixel unit 284 on the pixel circuit unit 283 are laminated. Further, a terminal portion 285 for connecting to the FPC 290 is provided in a portion of the substrate 201 that does not overlap with the pixel portion 284. Further, the terminal portion 285 and the circuit portion 282 are electrically connected by a wiring portion 286 composed of a plurality of wirings.
- the pixel unit 284 has a plurality of pixels 284a arranged periodically. An enlarged view of one pixel 284a is shown on the right side of FIG. 12B.
- the pixel 284a includes a light emitting element 120R, a light emitting element 120G, and a light emitting element 120B.
- the pixel circuit unit 283 has a plurality of pixel circuits 283a arranged periodically.
- the plurality of pixels 284a and the plurality of pixel circuits 283a may be arranged in a striped arrangement as shown in FIG. 12B. Not limited to the stripe arrangement, a plurality of pixels 284a and a plurality of pixel circuits 283a may be arranged in a delta arrangement.
- One pixel circuit 283a is a circuit that controls light emission of three light emitting elements possessed by one pixel 284a.
- the one pixel circuit 283a may be configured to be provided with three circuits for controlling the light emission of one light emitting element.
- the pixel circuit 283a can have at least one selection transistor, one current control transistor (drive transistor), and a capacitance element for each light emitting element. At this time, a gate signal is input to the gate of the selection transistor, and a source signal is input to one of the source and drain. As a result, an active matrix type display device is realized.
- the circuit unit 282 has a circuit for driving each pixel circuit 283a of the pixel circuit unit 283.
- a gate line drive circuit for example, it is preferable to have a gate line drive circuit, a source line drive circuit, and the like.
- it may have an arithmetic circuit, a memory circuit, a power supply circuit, and the like.
- the FPC 290 functions as wiring for supplying a video signal, a power supply potential, or the like to the circuit unit 282 from the outside. Further, the IC may be mounted on the FPC 290.
- the aperture ratio (effective display area ratio) of the display unit 281 should be extremely high.
- the aperture ratio of the display unit 281 can be 40% or more and less than 100%, preferably 50% or more and 95% or less, and more preferably 60% or more and 95% or less.
- the pixels 284a can be arranged at an extremely high density, and the definition of the display unit 281 can be extremely high.
- pixels 284a may be arranged with a fineness of 2000 ppi or more, preferably 3000 ppi or more, more preferably 5000 ppi or more, still more preferably 6000 ppi or more, 20000 ppi or less, or 30000 ppi or less. preferable.
- a display module 280 has extremely high definition, it can be suitably used for a device for VR such as a head-mounted display or a device for glasses-type AR. For example, even in the case of a configuration in which the display unit of the display module 280 is visually recognized through the lens, since the display module 280 has an extremely high-definition display unit 281, the pixels are not visually recognized even if the display unit is enlarged by the lens. , A highly immersive display can be performed. Further, the display module 280 is not limited to this, and can be suitably used for an electronic device having a relatively small display unit. For example, it can be suitably used for a display unit of a wearable electronic device such as a wristwatch.
- This embodiment can be implemented by appropriately combining at least a part thereof with other embodiments described in the present specification.
- the display device shown in FIG. 13A includes a pixel unit 502, a drive circuit unit 504, a protection circuit 506, and a terminal unit 507.
- the display device according to one aspect of the present invention may not be provided with the protection circuit 506.
- the pixel unit 502 has a plurality of pixel circuits 501 arranged in X rows and Y columns (X and Y are independently two or more natural numbers). Each pixel circuit 501 has a circuit for driving a display element.
- the drive circuit unit 504 has a drive circuit such as a gate driver 504a that outputs a scanning signal to the gate lines GL_1 to GL_X, and a source driver 504b that supplies a data signal to the data lines DL_1 to DL_Y.
- the gate driver 504a may be configured to have at least a shift register.
- the source driver 504b is configured by using, for example, a plurality of analog switches. Further, the source driver 504b may be configured by using a shift register or the like.
- the terminal portion 507 refers to a portion provided with a terminal for inputting a power supply, a control signal, an image signal, etc. from an external circuit to the display device.
- the protection circuit 506 is a circuit that makes the wiring connected to itself in a conductive state when a potential outside a certain range is applied to the wiring.
- the protection circuit 506 shown in FIG. 13A is used for various wirings such as a gate wire GL which is a wiring between the gate driver 504a and the pixel circuit 501 or a data line DL which is a wiring between the source driver 504b and the pixel circuit 501. Be connected.
- the gate driver 504a and the source driver 504b may be provided on the same substrate as the pixel portion 502, respectively, or a substrate on which a gate driver circuit or a source driver circuit is separately formed (for example, a single crystal semiconductor or a polycrystal).
- a drive circuit board made of a semiconductor may be mounted on the board by COG or TAB (Tape Automated Bonding).
- the plurality of pixel circuits 501 shown in FIG. 13A can have the configuration shown in FIG. 13B, for example.
- the pixel circuit 501 shown in FIG. 13B includes transistors 552 and 554, a capacitance element 562, and a light emitting element 57 2. Further, a data line DL_n, a gate line GL_m, a potential supply line VL_a, a potential supply line VL_b, and the like are connected to the pixel circuit 501.
- a high power supply potential VDD is given to one of the potential supply line VL_a and the potential supply line VL_b, and a low power supply potential VSS is given to the other.
- the brightness of light emitted from the light emitting element 572 is controlled by controlling the current flowing through the light emitting element 572 according to the potential given to the gate of the transistor 554.
- This embodiment can be implemented by appropriately combining at least a part thereof with other embodiments described in the present specification.
- FIG. 14A shows a circuit diagram of the pixel circuit 400.
- the pixel circuit 400 includes a transistor M1, a transistor M2, a capacitance C1, and a circuit 401. Further, wiring S1, wiring S2, wiring G1 and wiring G2 are connected to the pixel circuit 400.
- the gate is connected to the wiring G1
- one of the source and drain is connected to the wiring S1
- the other is connected to one electrode of the capacitance C1.
- the transistor M2 connects the gate to the wiring G2, one of the source and the drain to the wiring S2, the other to the other electrode of the capacitance C1, and the circuit 401, respectively.
- Circuit 401 is a circuit including at least one display element.
- Various elements can be used as the display element, and typically, a light emitting element such as an organic EL element or an LED element can be used.
- a liquid crystal element, a MEMS (Micro Electro Mechanical Systems) element, or the like can also be used.
- node N1 The node connecting the transistor M1 and the capacitance C1 is referred to as node N1, and the node connecting the transistor M2 and the circuit 401 is referred to as node N2.
- the pixel circuit 400 can hold the potential of the node N1 by turning off the transistor M1. Further, by turning off the transistor M2, the potential of the node N2 can be maintained. Further, by writing a predetermined potential to the node N1 via the transistor M1 with the transistor M2 turned off, the potential of the node N2 is changed according to the displacement of the potential of the node N1 by the capacitive coupling via the capacitance C1. Can be changed.
- the transistor to which the oxide semiconductor is applied which is exemplified in the first embodiment, can be applied to one or both of the transistor M1 and the transistor M2. Therefore, the potentials of the nodes N1 and N2 can be maintained for a long period of time due to the extremely low off current.
- a transistor to which a semiconductor such as silicon is applied may be used.
- FIG. 14B is a timing chart relating to the operation of the pixel circuit 400.
- the effects of various resistances such as wiring resistance, parasitic capacitance of transistors or wiring, and threshold voltage of transistors are not considered here.
- one frame period is divided into a period T1 and a period T2.
- the period T1 is a period for writing the potential to the node N2
- the period T2 is a period for writing the potential to the node N1.
- Period T1 During the period T1, both the wiring G1 and the wiring G2 are given a potential to turn on the transistor. Further, the potential V ref , which is a fixed potential, is supplied to the wiring S1, and the first data potential V w is supplied to the wiring S2.
- the potential V ref is given to the node N1 from the wiring S1 via the transistor M1. Further, the node N2 is given a first data potential V w from the wiring S2 via the transistor M2. Therefore, the potential difference V w ⁇ V ref is held in the capacitance C1.
- the wiring G1 is given a potential for turning on the transistor M1, and the wiring G2 is given a potential for turning off the transistor M2. Further, a second data potential V data is supplied to the wiring S1.
- a predetermined constant potential may be applied to the wiring S2, or the wiring S2 may be in a floating state.
- a second data potential V data is given to the node N1 from the wiring S1 via the transistor M1.
- the potential of the node N2 changes by the potential dV according to the second data potential V data . That is, the potential obtained by adding the first data potential V w and the potential dV is input to the circuit 401.
- FIG. 14B shows that the potential dV is a positive value, it may be a negative value. That is, the second data potential V data may be lower than the potential V ref .
- the potential dV is roughly determined by the capacitance value of the capacitance C1 and the capacitance value of the circuit 401.
- the potential dV becomes a potential close to the second data potential V data .
- the pixel circuit 400 can generate a potential to be supplied to the circuit 401 including the display element by combining two types of data signals, it is possible to correct the gradation in the pixel circuit 400. Become.
- the pixel circuit 400 can also generate a potential exceeding the maximum potential that can be supplied to the wiring S1 and the wiring S2.
- HDR high dynamic range
- a liquid crystal element is used, overdrive drive and the like can be realized.
- the pixel circuit 400EL shown in FIG. 14C has a circuit 401EL.
- the circuit 401EL has a light emitting element EL, a transistor M3, and a capacitance C2.
- the transistor M3 is connected to one electrode of the node N2 and the capacitance C2 by the gate, a wiring in which one of the source and the drain gives the potential VH , and one electrode of the light emitting element EL in the other.
- the capacitance C2 is connected to a wiring in which the other electrode provides a potential V com .
- the light emitting element EL is connected to a wiring in which the other electrode gives the potential VL .
- the transistor M3 has a function of controlling the current supplied to the light emitting element EL.
- the capacity C2 functions as a holding capacity. The capacity C2 can be omitted if it is unnecessary.
- the transistor M3 may be connected to the cathode side. At that time, the values of the potential V H and the potential VL can be changed as appropriate.
- the pixel circuit 400EL can pass a large current through the light emitting element EL by applying a high potential to the gate of the transistor M3, for example, HDR display can be realized. Further, by supplying the correction signal to the wiring S1 or the wiring S2, it is possible to correct the variation in the electrical characteristics of the transistor M3 or the light emitting element EL.
- circuit is not limited to the circuit illustrated in FIG. 14C, and a transistor or a capacitance may be added separately.
- This embodiment can be implemented by appropriately combining at least a part thereof with other embodiments described in the present specification.
- the display device and display module according to one aspect of the present invention can be applied to a display unit of an electronic device or the like having a display function.
- electronic devices include, for example, electronic devices having a relatively large screen such as television devices, notebook personal computers, monitor devices, digital signage, pachinko machines, and game machines, as well as digital cameras and digital video cameras. Examples include digital photo frames, mobile phones, portable game machines, mobile information terminals, sound reproduction devices, and the like.
- the display device and display module according to one aspect of the present invention can be preferably used for an electronic device having a relatively small display unit because the definition can be increased.
- electronic devices include, for example, wristwatch-type and bracelet-type information terminals (wearable devices), VR devices such as head-mounted displays, glasses-type AR devices, and other wearable devices that can be worn on the head. Can be mentioned.
- FIG. 15A shows a perspective view of the glasses-type electronic device 700.
- the electronic device 700 has a pair of display panels 701, a pair of housings 702, a pair of optical members 703, a pair of mounting portions 704, and the like.
- the electronic device 700 can project the image displayed on the display panel 701 onto the display area 706 of the optical member 703. Further, since the optical member 703 has translucency, the user can see the image displayed in the display area 706 by superimposing it on the transmitted image visually recognized through the optical member 703. Therefore, the electronic device 700 is an electronic device capable of AR display.
- one housing 702 is provided with a camera 705 capable of photographing the front.
- one of the housings 702 is provided with a wireless receiver or a connector to which a cable can be connected, and a video signal or the like can be supplied to the housing 702.
- an acceleration sensor such as a gyro sensor
- the housing 702 is preferably provided with a battery, and can be charged wirelessly or by wire.
- a display panel 701, a lens 711, and a reflector 712 are provided inside the housing 702. Further, a portion of the optical member 703 corresponding to the display area 706 has a reflecting surface 713 that functions as a half mirror.
- the light 715 emitted from the display panel 701 passes through the lens 711 and is reflected by the reflector 712 toward the optical member 703. Inside the optical member 703, the light 715 repeats total internal reflection at the end surface of the optical member 703 and reaches the reflecting surface 713, so that an image is projected on the reflecting surface 713. As a result, the user can visually recognize both the light 715 reflected by the reflecting surface 713 and the transmitted light 716 transmitted through the optical member 703 (including the reflecting surface 713).
- FIG. 15 shows an example in which the reflector 712 and the reflector 713 each have a curved surface.
- the degree of freedom in optical design can be increased and the thickness of the optical member 703 can be reduced as compared with the case where these are flat surfaces.
- the reflector 712 and the reflection surface 713 may be flat.
- the reflector 712 a member having a mirror surface can be used, and it is preferable that the reflector has a high reflectance. Further, as the reflecting surface 713, a half mirror utilizing the reflection of the metal film may be used, but if a prism or the like utilizing the total reflection is used, the transmittance of the transmitted light 716 can be increased.
- the housing 702 has a mechanism for adjusting the distance between the lens 711 and the display panel 701, or an angle thereof. This makes it possible to adjust the focus, enlarge or reduce the image, and the like.
- the lens 711 and the display panel 701 may be configured to be movable in the optical axis direction.
- the housing 702 has a mechanism capable of adjusting the angle of the reflector 712. By changing the angle of the reflector 712, it is possible to change the position of the display area 706 in which the image is displayed. This makes it possible to arrange the display area 706 at an optimum position according to the position of the user's eyes.
- a display device or display module according to one aspect of the present invention can be applied to the display panel 701. Therefore, it is possible to obtain an electronic device 700 capable of displaying extremely high definition.
- FIG. 16A and 16B show perspective views of the goggle-type electronic device 750.
- FIG. 16A is a perspective view showing the front surface, the plane surface, and the left side surface of the electronic device 750
- FIG. 16B is a perspective view showing the back surface, the bottom surface, and the right side surface of the electronic device 750.
- the electronic device 750 has a pair of display panels 751, a housing 752, a pair of mounting portions 754, a cushioning member 755, a pair of lenses 756, and the like.
- the pair of display panels 751 are provided at positions inside the housing 752 that can be visually recognized through the lens 756.
- the electronic device 750 is an electronic device for VR.
- a user wearing the electronic device 750 can visually recognize the image displayed on the display panel 751 through the lens 756. Further, by displaying different images on the pair of display panels 751, it is possible to perform three-dimensional display using parallax.
- an input terminal 757 and an output terminal 758 are provided on the back side of the housing 752.
- a cable for supplying a video signal from a video output device or the like, power for charging a battery provided in the housing 752, or the like can be connected to the input terminal 757.
- the output terminal 758 functions as, for example, an audio output terminal, and earphones, headphones, and the like can be connected to it. If the audio data can be output by wireless communication, or if the audio is output from an external video output device, the audio output terminal may not be provided.
- the housing 752 has a mechanism capable of adjusting the left and right positions of the lens 756 and the display panel 751 so as to be in the optimum positions according to the positions of the eyes of the user. .. Further, it is preferable to have a mechanism for adjusting the focus by changing the distance between the lens 756 and the display panel 751.
- a display device or display module according to one aspect of the present invention can be applied to the display panel 751. Therefore, it is possible to obtain an electronic device 750 capable of displaying extremely high definition. This makes the user feel highly immersive.
- the cushioning member 755 is a part that comes into contact with the user's face (forehead, cheeks, etc.). When the cushioning member 755 is in close contact with the user's face, light leakage can be prevented and the immersive feeling can be further enhanced.
- a soft material for example, materials such as rubber, silicone rubber, urethane, and sponge can be used.
- a gap is unlikely to occur between the user's face and the cushioning member 755, and light leakage is suitably prevented. Can be done. Further, it is preferable to use such a material because it is soft to the touch and does not make the user feel cold when worn in a cold season or the like.
- This embodiment can be implemented by appropriately combining at least a part thereof with other embodiments described in the present specification.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
Description
図2A乃至図2Cは、表示装置の構成例を示す図である。
図3A及び図3Bは、表示装置の構成例を示す図である。
図4A及び図4Bは、表示装置の構成例を説明する図である。
図5A乃至図5Dは、表示装置の作製方法例を説明する図である。
図6A乃至図6Dは、表示装置の作製方法例を説明する図である。
図7A乃至図7Cは、表示装置の作製方法例を説明する図である。
図8A及び図8Bは、表示装置の構成例を示す図である。
図9は、表示装置の構成例を示す図である。
図10は、表示装置の構成例を示す図である。
図11は、表示装置の構成例を示す図である。
図12A及び図12Bは、表示モジュールの構成例を示す図である。
図13A及び図13Bは、表示装置の一例を示す回路図である。
図14A及び図14Cは、表示装置の一例を示す回路図である。図14Bは、表示装置の動作例を示すタイミングチャートである。
図15A及び図15Bは、電子機器の構成例を示す図である。
図16A及び図16Bは、電子機器の構成例を示す図である。
図17A乃至図17Dは、表示装置の構成例を示す図である。
本実施の形態では、本発明の一態様の表示装置、及び表示装置の作製方法について説明する。
図1Aは、本発明の一態様の表示装置を説明する断面概略図である。また、図1Bは、図1Aに示す、発光素子120に挟まれた領域Aの拡大図である。表示装置100は、発光素子120R、発光素子120G、及び発光素子120Bを有する。発光素子120Rは赤色を呈する発光素子であり、発光素子120Gは緑色を呈する発光素子であり、発光素子120Bは青色を呈する発光素子である。
発光素子120に用いることのできる発光素子としては、自発光が可能な素子を用いることができ、電流または電圧によって輝度が制御される素子をその範疇に含んでいる。例えば、LED、有機EL素子、無機EL素子等を用いることができる。特に、有機EL素子を用いることが好ましい。
発光素子120が有するEL層115は、図17Aに示すように、層4420、発光層4411、層4430などの複数の層で構成することができる。層4420は、例えば電子注入性の高い物質を含む層(電子注入層)および電子輸送性の高い物質を含む層(電子輸送層)などを有することができる。発光層4411は、例えば発光性の化合物を有する。層4430は、例えば正孔注入性の高い物質を含む層(正孔注入層)および正孔輸送性の高い物質を含む層(正孔輸送層)を有することができる。
本発明の一態様の表示装置の作製方法の一例について、図面を参照して説明する。
基板101としては、少なくとも後の熱処理に耐えうる程度の耐熱性を有する基板を用いることができる。基板101として、絶縁性基板を用いる場合には、ガラス基板、石英基板、サファイア基板、セラミック基板などが挙げられる。また、シリコンまたは炭化シリコンなどを材料とした単結晶半導体基板、多結晶半導体基板、シリコンゲルマニウム等の化合物半導体基板、SOI基板などの半導体基板を用いることができる。
基板101上に絶縁層121を成膜する(図5A参照)。絶縁層121は、上述の絶縁性材料、および成膜方法を用いて適宜形成することができる。
絶縁層121の、プラグ131を形成する位置に基板101に達する開口を形成する。当該開口は、基板101に設けられた電極または配線に達する開口であることが好ましい。続いて、当該開口を埋めるように導電膜を成膜した後に、絶縁層121の上面が露出するように平坦化処理を行う。これにより、絶縁層121に埋め込まれたプラグ131を形成することができる(図5A参照)。
絶縁層121、及びプラグ131上に導電膜を成膜する。当該導電膜を島状に加工し、導電層111を形成する(図5B参照)。導電層111は、プラグ131と電気的に接続する。ここで、絶縁層121の導電層111と重畳しない領域において、凹部が形成される場合がある。
続いて、導電層111及び絶縁層121上に、発光素子120BのEL層115Bfと導電層116fを順に成膜する。次に、導電層116f上に、レジストRES1を用いたパターンを形成する(図5C参照)。ここで、EL層115Bfは、後の工程でEL層115Bとなる層である。また、導電層116fは、後の工程で導電層116となる層である。また、EL層115Bf、後に形成する、EL層115Gf、及びEL層115RfをまとめてEL層115fと呼ぶ場合がある。
続いて、絶縁層121、および導電層116上に、絶縁層124を成膜する(図6D参照)。絶縁層124は、上述の絶縁性材料、および成膜方法を用いて適宜形成することができる。なお、絶縁層124の成膜温度は、EL層115が劣化しない範囲とすることが好ましく、例えば、室温以上100℃以下程度にすればよい。
以下では、トランジスタを有する表示装置の例について説明する。
図8Aは、表示装置200Aの断面概略図である。
図9は、表示装置200Bの断面概略図である。表示装置200Bは、トランジスタの構成が異なる点で、上記表示装置200Aと主に相違している。
図10は、表示装置200Cの断面概略図である。表示装置200Cは、基板201にチャネルが形成されるトランジスタ210と、チャネルが形成される半導体層に金属酸化物を含むトランジスタ220とが積層された構成を有する。
図11は、表示装置200Dの断面概略図である。表示装置200Dは、上記表示装置200Cに対して、酸化物半導体が適用されたトランジスタを2つ積層した点で、主に相違している。
トランジスタは、ゲート電極として機能する導電層と、半導体層と、ソース電極として機能する導電層と、ドレイン電極として機能する導電層と、ゲート絶縁層として機能する絶縁層と、を有する。
以下では、本発明の一態様で開示されるトランジスタに用いることができるCAC−OSの構成について説明する。
トランジスタのゲート、ソース及びドレインのほか、表示装置を構成する各種配線及び電極などの導電層に用いることのできる材料としては、アルミニウム、チタン、クロム、ニッケル、銅、イットリウム、ジルコニウム、モリブデン、銀、タンタル、またはタングステンなどの金属、またはこれを主成分とする合金などが挙げられる。またこれらの材料を含む膜を単層で、または積層構造として用いることができる。例えば、シリコンを含むアルミニウム膜の単層構造、チタン膜上にアルミニウム膜を積層する二層構造、タングステン膜上にアルミニウム膜を積層する二層構造、銅−マグネシウム−アルミニウム合金膜上に銅膜を積層する二層構造、チタン膜上に銅膜を積層する二層構造、タングステン膜上に銅膜を積層する二層構造、チタン膜または窒化チタン膜と、その上に重ねてアルミニウム膜または銅膜を積層し、さらにその上にチタン膜または窒化チタン膜を形成する三層構造、モリブデン膜または窒化モリブデン膜と、その上に重ねてアルミニウム膜または銅膜を積層し、さらにその上にモリブデン膜または窒化モリブデン膜を形成する三層構造等がある。なお、酸化インジウム、酸化錫または酸化亜鉛等の酸化物を用いてもよい。また、マンガンを含む銅を用いると、エッチングによる形状の制御性が高まるため好ましい。
各絶縁層に用いることのできる絶縁材料としては、例えば、アクリル樹脂、エポキシ樹脂などの樹脂、シリコーンなどのシロキサン結合を有する樹脂の他、酸化シリコン、酸化窒化シリコン、窒化酸化シリコン、窒化シリコン、酸化アルミニウムなどの無機絶縁材料を用いることもできる。
以下では、本発明の一態様の表示装置を有する表示モジュールの構成例について説明する。
本実施の形態では、本発明の一態様の表示装置について、図13を用いて説明を行う。
以下では、本発明の一態様の表示装置に適用可能な画素に表示される階調を補正するためのメモリを備える画素回路と、これを有する表示装置について説明する。
図14Aに、画素回路400の回路図を示す。画素回路400は、トランジスタM1、トランジスタM2、容量C1、及び回路401を有する。また画素回路400には、配線S1、配線S2、配線G1、及び配線G2が接続される。
続いて、図14Bを用いて、画素回路400の動作方法の一例を説明する。図14Bは、画素回路400の動作に係るタイミングチャートである。なおここでは説明を容易にするため、配線抵抗などの各種抵抗、トランジスタまたは配線などの寄生容量、及びトランジスタのしきい値電圧などの影響は考慮しない。
期間T1では、配線G1と配線G2の両方に、トランジスタをオン状態にする電位を与える。また、配線S1には固定電位である電位Vrefを供給し、配線S2には第1データ電位Vwを供給する。
続いて期間T2では、配線G1にはトランジスタM1をオン状態とする電位を与え、配線G2にはトランジスタM2をオフ状態とする電位を与える。また、配線S1には第2データ電位Vdataを供給する。配線S2には所定の定電位を与える、またはフローティング状態としてもよい。
図14Cに示す画素回路400ELは、回路401ELを有する。回路401ELは、発光素子EL、トランジスタM3、及び容量C2を有する。
本実施の形態では、本発明の一態様の表示装置を適用した電子機器の構成例について説明する。
Claims (20)
- 発光素子と、
前記発光素子を覆うように配置された絶縁層と、を有し、
前記発光素子は、
第1の導電層と、
前記第1の導電層上のEL層と、
前記EL層上の第2の導電層と、を有し、
前記絶縁層は、
第1の層と、
前記第1の層上の第2の層と、
前記第2の層上の第3の層と、を有し、
前記第1の層は、水および酸素の少なくとも一方を、捕獲または固着する機能を有し、
前記第2の層は、水および酸素の少なくとも一方の拡散を抑制する機能を有し、
前記第3の層は、前記第1の層および前記第2の層の少なくとも一方よりも、炭素の濃度が高い、
表示装置。 - 基板上のトランジスタと、
前記トランジスタ上の第1の絶縁層と、
前記第1の絶縁層に埋め込まれるように配置されたプラグと、
前記第1の絶縁層上の発光素子と、
前記発光素子を覆うように配置された第2の絶縁層と、を有し、
前記発光素子は、
第1の導電層と、
前記第1の導電層上のEL層と、
前記EL層上の第2の導電層と、を有し、
前記プラグは、前記トランジスタのソースおよびドレインの一方と、前記第1の導電層と、を電気的に接続し、
前記第2の絶縁層は、
第1の層と、
前記第1の層上の第2の層と、
前記第2の層上の第3の層と、を有し、
前記第1の層は、水および酸素の少なくとも一方を、捕獲または固着する機能を有し、
前記第2の層は、水および酸素の少なくとも一方の拡散を抑制する機能を有し、
前記第3の層は、前記第1の層および前記第2の層の少なくとも一方よりも、炭素の濃度が高い、
表示装置。 - 請求項2において、
前記第1の絶縁層と、前記発光素子との間に第3の絶縁層を有し、
前記第3の絶縁層は、水および酸素の少なくとも一方の拡散を抑制する機能を有する、表示装置。 - 請求項3において、
前記第3の絶縁層は、窒素と、シリコンと、を有する、表示装置。 - 請求項3または請求項4において、
前記第3の絶縁層は、前記発光素子と重畳しない領域において、前記第2の絶縁層と接する、表示装置。 - 請求項2乃至請求項5のいずれか一項において、
前記基板は、シリコン基板であり、
前記トランジスタは、チャネル形成領域にシリコンを有する、表示装置。 - 請求項2乃至請求項5のいずれか一項において、
前記基板上に、酸化物半導体膜が設けられ、
前記トランジスタは、チャネル形成領域に前記酸化物半導体膜を有する、表示装置。 - 請求項1乃至請求項7のいずれか一項において、
前記第1の層は、前記EL層の側面に接する、表示装置。 - 請求項1乃至請求項8のいずれか一項において、
前記第1の層は、スパッタリング法で成膜される、表示装置。 - 請求項1乃至請求項9のいずれか一項において、
前記第1の層は、酸素と、アルミニウムと、を有する、表示装置。 - 請求項1乃至請求項9のいずれか一項において、
前記第1の層は、酸素と、ハフニウムと、を有する、表示装置。 - 請求項1乃至請求項11のいずれか一項において、
前記第2の層は、スパッタリング法で成膜される、表示装置。 - 請求項1乃至請求項12のいずれか一項において、
前記第2の層は、窒素と、シリコンと、を有する、表示装置。 - 請求項1乃至請求項13のいずれか一項において、
前記第3の層は、ALD法で成膜される、表示装置。 - 請求項1乃至請求項14のいずれか一項において、
前記第3の層は、前記第1の層および前記第2の層の少なくとも一方よりも、水素の濃度が高い、表示装置。 - 請求項1乃至請求項15のいずれか一項において、
前記第3の層は、前記第1の層および前記第2の層の少なくとも一方よりも、密度が小さい、表示装置。 - 請求項1乃至請求項16のいずれか一項において、
前記第3の層は、酸素と、アルミニウムと、を有する、表示装置。 - 請求項1乃至請求項17のいずれか一項において、
前記EL層の側面は、前記第1の導電層の側面よりも内側に位置する、表示装置。 - 請求項1乃至請求項17のいずれか一項において、
前記EL層は、前記第1の導電層の側面を覆う、表示装置。 - 請求項1乃至請求項19のいずれか一項において、
前記EL層と前記第1の導電層の間に絶縁体が配置され、
前記絶縁体は、前記第1の導電層の上に開口を有し、
前記開口において、前記EL層と前記第1の導電層が接する、表示装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/260,818 US20240057453A1 (en) | 2021-01-14 | 2022-01-05 | Display device |
JP2022574856A JPWO2022153137A1 (ja) | 2021-01-14 | 2022-01-05 | |
CN202280008245.1A CN116686034A (zh) | 2021-01-14 | 2022-01-05 | 显示装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021004093 | 2021-01-14 | ||
JP2021-004093 | 2021-01-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022153137A1 true WO2022153137A1 (ja) | 2022-07-21 |
Family
ID=82447978
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2022/050050 WO2022153137A1 (ja) | 2021-01-14 | 2022-01-05 | 表示装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240057453A1 (ja) |
JP (1) | JPWO2022153137A1 (ja) |
CN (1) | CN116686034A (ja) |
TW (1) | TW202232796A (ja) |
WO (1) | WO2022153137A1 (ja) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001203076A (ja) * | 1999-11-09 | 2001-07-27 | Semiconductor Energy Lab Co Ltd | 発光装置及びその作製方法 |
JP2001284042A (ja) * | 2000-03-31 | 2001-10-12 | Denso Corp | 有機el素子 |
JP2002324673A (ja) * | 2001-02-22 | 2002-11-08 | Semiconductor Energy Lab Co Ltd | 有機発光素子および前記素子を用いた表示装置 |
JP2006165537A (ja) * | 2004-11-19 | 2006-06-22 | Asm Internatl Nv | 低温での金属酸化物膜の製造方法 |
JP2016115905A (ja) * | 2014-12-18 | 2016-06-23 | 株式会社ジャパンディスプレイ | 有機el表示装置 |
JP2020514979A (ja) * | 2017-01-05 | 2020-05-21 | ジュスン エンジニアリング カンパニー リミテッド | 透湿防止膜とその製造方法 |
-
2022
- 2022-01-04 TW TW111100215A patent/TW202232796A/zh unknown
- 2022-01-05 JP JP2022574856A patent/JPWO2022153137A1/ja active Pending
- 2022-01-05 WO PCT/IB2022/050050 patent/WO2022153137A1/ja active Application Filing
- 2022-01-05 US US18/260,818 patent/US20240057453A1/en active Pending
- 2022-01-05 CN CN202280008245.1A patent/CN116686034A/zh active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001203076A (ja) * | 1999-11-09 | 2001-07-27 | Semiconductor Energy Lab Co Ltd | 発光装置及びその作製方法 |
JP2001284042A (ja) * | 2000-03-31 | 2001-10-12 | Denso Corp | 有機el素子 |
JP2002324673A (ja) * | 2001-02-22 | 2002-11-08 | Semiconductor Energy Lab Co Ltd | 有機発光素子および前記素子を用いた表示装置 |
JP2006165537A (ja) * | 2004-11-19 | 2006-06-22 | Asm Internatl Nv | 低温での金属酸化物膜の製造方法 |
JP2016115905A (ja) * | 2014-12-18 | 2016-06-23 | 株式会社ジャパンディスプレイ | 有機el表示装置 |
JP2020514979A (ja) * | 2017-01-05 | 2020-05-21 | ジュスン エンジニアリング カンパニー リミテッド | 透湿防止膜とその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
US20240057453A1 (en) | 2024-02-15 |
TW202232796A (zh) | 2022-08-16 |
CN116686034A (zh) | 2023-09-01 |
JPWO2022153137A1 (ja) | 2022-07-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP7304850B2 (ja) | 表示装置 | |
WO2022153137A1 (ja) | 表示装置 | |
JP2023093390A (ja) | 表示装置、及び電子機器 | |
WO2021070009A1 (ja) | 表示装置、および電子機器 | |
WO2022144668A1 (ja) | 表示装置 | |
WO2022130108A1 (ja) | 表示装置および表示装置の作製方法 | |
WO2022136995A1 (ja) | 表示装置、及び表示装置の作製方法 | |
WO2022153140A1 (ja) | 表示装置、及び表示装置の作製方法 | |
WO2022118140A1 (ja) | 表示装置、表示モジュール、及び表示装置の作製方法 | |
CN112106446B (zh) | 显示装置及显示装置的制造方法 | |
WO2022224091A1 (ja) | 表示装置 | |
US20240224698A1 (en) | Display apparatus | |
US20220320184A1 (en) | Display apparatus, display module, electronic device, and method for manufacturing display apparatus | |
WO2022200916A1 (ja) | 表示装置、表示装置の作製方法、表示モジュール、及び電子機器 | |
WO2023052906A1 (ja) | 表示装置 | |
WO2022229790A1 (ja) | 表示装置 | |
WO2023073473A1 (ja) | 表示装置、及び表示装置の作製方法 | |
KR20240088858A (ko) | 표시 장치 | |
CN117044397A (zh) | 显示装置 | |
CN117099482A (zh) | 显示装置、显示装置的制造方法、显示模块及电子设备 | |
CN117204122A (zh) | 显示装置 | |
CN118160027A (zh) | 显示装置及电子设备 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22739215 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280008245.1 Country of ref document: CN |
|
ENP | Entry into the national phase |
Ref document number: 2022574856 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18260818 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 22739215 Country of ref document: EP Kind code of ref document: A1 |