JP2016001673A - 薄膜トランジスタ、アクティブマトリックス基板、薄膜トランジスタの製造方法およびアクティブマトリックス基板の製造方法 - Google Patents
薄膜トランジスタ、アクティブマトリックス基板、薄膜トランジスタの製造方法およびアクティブマトリックス基板の製造方法 Download PDFInfo
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- 239000000758 substrate Substances 0.000 title claims abstract description 61
- 239000010409 thin film Substances 0.000 title claims abstract description 49
- 239000011159 matrix material Substances 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 239000010408 film Substances 0.000 claims abstract description 422
- 239000004065 semiconductor Substances 0.000 claims abstract description 231
- 238000005530 etching Methods 0.000 claims abstract description 61
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 30
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 16
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 10
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 42
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 36
- 229910052751 metal Inorganic materials 0.000 claims description 35
- 239000002184 metal Substances 0.000 claims description 35
- 239000000126 substance Substances 0.000 claims description 31
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 21
- 238000001039 wet etching Methods 0.000 claims description 20
- 235000006408 oxalic acid Nutrition 0.000 claims description 12
- 239000000956 alloy Substances 0.000 claims description 11
- 229910045601 alloy Inorganic materials 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 9
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 9
- 229910001887 tin oxide Inorganic materials 0.000 claims description 9
- 239000011787 zinc oxide Substances 0.000 claims description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims description 7
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 239000011733 molybdenum Substances 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 238000003475 lamination Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 56
- 229920002120 photoresistant polymer Polymers 0.000 description 39
- 239000000243 solution Substances 0.000 description 38
- 230000015572 biosynthetic process Effects 0.000 description 21
- 229910007541 Zn O Inorganic materials 0.000 description 16
- 230000001681 protective effect Effects 0.000 description 14
- 239000007789 gas Substances 0.000 description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 229910007604 Zn—Sn—O Inorganic materials 0.000 description 8
- 239000011651 chromium Substances 0.000 description 8
- 229910052814 silicon oxide Inorganic materials 0.000 description 8
- 239000010936 titanium Substances 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 239000004973 liquid crystal related substance Substances 0.000 description 6
- 238000004544 sputter deposition Methods 0.000 description 6
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 6
- 229910003437 indium oxide Inorganic materials 0.000 description 5
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 5
- 238000000206 photolithography Methods 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 229910021417 amorphous silicon Inorganic materials 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 4
- 238000001312 dry etching Methods 0.000 description 4
- 239000011737 fluorine Substances 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 238000009832 plasma treatment Methods 0.000 description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 229910052715 tantalum Inorganic materials 0.000 description 4
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 229910020923 Sn-O Inorganic materials 0.000 description 3
- 229910006404 SnO 2 Inorganic materials 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
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- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
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- 238000005229 chemical vapour deposition Methods 0.000 description 2
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- 238000000151 deposition Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 101100489584 Solanum lycopersicum TFT1 gene Proteins 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
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- 238000013329 compounding Methods 0.000 description 1
- 238000005520 cutting process Methods 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
- 238000005401 electroluminescence Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- -1 for example Substances 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- WMIYKQLTONQJES-UHFFFAOYSA-N hexafluoroethane Chemical compound FC(F)(F)C(F)(F)F WMIYKQLTONQJES-UHFFFAOYSA-N 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- QKCGXXHCELUCKW-UHFFFAOYSA-N n-[4-[4-(dinaphthalen-2-ylamino)phenyl]phenyl]-n-naphthalen-2-ylnaphthalen-2-amine Chemical compound C1=CC=CC2=CC(N(C=3C=CC(=CC=3)C=3C=CC(=CC=3)N(C=3C=C4C=CC=CC4=CC=3)C=3C=C4C=CC=CC4=CC=3)C3=CC4=CC=CC=C4C=C3)=CC=C21 QKCGXXHCELUCKW-UHFFFAOYSA-N 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 229960001730 nitrous oxide Drugs 0.000 description 1
- 235000013842 nitrous oxide Nutrition 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
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- 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
- H01L27/124—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 layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
- H01L27/1244—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 layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits for preventing breakage, peeling or short circuiting
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- 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
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/417—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions carrying the current to be rectified, amplified or switched
- H01L29/41725—Source or drain electrodes for field effect devices
- H01L29/41733—Source or drain electrodes for field effect devices for thin film transistors with insulated gate
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- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
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Abstract
Description
Claims (12)
- 基板上に順に積層されるゲート電極、ゲート絶縁膜および半導体層と、
前記半導体層上で互いに離間して対向するように設けられるソース電極およびドレイン電極とを備え、
前記半導体層は、
前記ゲート絶縁膜上に積層され、酸化物半導体で構成される酸化物半導体膜と、
前記酸化物半導体膜上に積層され、導電性酸化物で構成される酸化物導電膜との2層を含み、
前記ソース電極および前記ドレイン電極は、少なくとも、互いに対向する側の端部が、前記酸化物導電膜を介して前記酸化物半導体膜と電気的に接続され、
対向する前記ソース電極と前記ドレイン電極との間の前記半導体層には、前記酸化物半導体膜によってチャネル領域が形成されており、
前記酸化物半導体膜は、端面の断面形状が略テーパー形状であることを特徴とする薄膜トランジスタ。 - 前記酸化物導電膜は、燐酸、硝酸および酢酸を含むPAN薬液によってエッチングされるときのエッチング速度が、前記酸化物半導体膜の前記エッチング速度よりも高い材料で構成されることを特徴とする請求項1に記載の薄膜トランジスタ。
- 前記酸化物半導体膜は、酸化錫を含むことを特徴とする請求項1または2に記載の薄膜トランジスタ。
- 前記酸化物導電膜は、酸化亜鉛を含むことを特徴とする請求項1から3のいずれか1つに記載の薄膜トランジスタ。
- 前記ソース電極および前記ドレイン電極は、アルミニウム(Al)、モリブデン(Mo)および銅(Cu)、ならびにこれらの合金から選ばれる少なくとも1つを含む金属材料で構成されることを特徴とする請求項1から4のいずれか1つに記載の薄膜トランジスタ。
- 前記酸化物半導体膜の膜厚は、前記酸化物導電膜の膜厚の2倍以上であることを特徴とする請求項1から5のいずれか1つに記載の薄膜トランジスタ。
- 画素電極と、前記画素電極に接続される複数のスイッチング素子とを備えるアクティブマトリックス基板であって、
前記スイッチング素子は、請求項1から6のいずれか1つに記載の薄膜トランジスタであることを特徴とするアクティブマトリックス基板。 - 基板上に順に積層されるゲート電極、ゲート絶縁膜および半導体層と、前記半導体層上で互いに離間して対向するように設けられるソース電極およびドレイン電極とを備える薄膜トランジスタの製造方法であって、
基板上に、ゲート電極およびゲート絶縁膜を順に形成する工程と、
前記ゲート絶縁膜上に、酸化錫を含む酸化物半導体で構成される酸化物半導体膜を形成する工程と、
前記酸化物半導体膜上に、酸化亜鉛を含む導電性酸化物で構成される酸化物導電膜を形成して、前記酸化物半導体膜と前記酸化物導電膜とが積層された2層を含む半導体層を形成する工程と、
前記半導体層をウエットエッチングする工程とを備えることを特徴とする薄膜トランジスタの製造方法。 - 前記半導体層をウエットエッチングする工程では、
シュウ酸を含む薬液によって、前記半導体層をウエットエッチングすることを特徴とする請求項8に記載の薄膜トランジスタの製造方法。 - 前記半導体層をウエットエッチングする工程では、
燐酸、硝酸および酢酸を含むPAN薬液によって、前記半導体層をウエットエッチングすることを特徴とする請求項8に記載の薄膜トランジスタの製造方法。 - 前記半導体層を形成する工程と、前記半導体層をウエットエッチングする工程との間に、前記半導体層上に、ソース電極およびドレイン電極となる金属膜を形成する工程を備え、
前記ソース電極およびドレイン電極となる金属膜を形成する工程では、
前記PAN薬液によってエッチングすることが可能な金属材料によって、前記金属膜を形成することを特徴とする請求項10に記載の薄膜トランジスタの製造方法。 - 画素電極と、前記画素電極に接続される複数のスイッチング素子とを備えるアクティブマトリックス基板の製造方法であって、
請求項8から11のいずれか1つに記載の薄膜トランジスタの製造方法によって、前記スイッチング素子として、薄膜トランジスタを形成する工程を備えることを特徴とするアクティブマトリックス基板の製造方法。
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