TWI353062B - Aluminum thick film composition(s), electrode(s), - Google Patents
Aluminum thick film composition(s), electrode(s), Download PDFInfo
- Publication number
- TWI353062B TWI353062B TW095120144A TW95120144A TWI353062B TW I353062 B TWI353062 B TW I353062B TW 095120144 A TW095120144 A TW 095120144A TW 95120144 A TW95120144 A TW 95120144A TW I353062 B TWI353062 B TW I353062B
- Authority
- TW
- Taiwan
- Prior art keywords
- composition
- glass
- thick film
- powder
- aluminum
- Prior art date
Links
- 239000000203 mixture Substances 0.000 title claims description 63
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 45
- 229910052782 aluminium Inorganic materials 0.000 title claims description 40
- 239000011521 glass Substances 0.000 claims description 84
- 239000000843 powder Substances 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 29
- 239000000758 substrate Substances 0.000 claims description 22
- 238000002485 combustion reaction Methods 0.000 claims description 15
- 239000011230 binding agent Substances 0.000 claims description 13
- 239000004020 conductor Substances 0.000 claims description 11
- 238000007650 screen-printing Methods 0.000 claims description 7
- 229910052732 germanium Inorganic materials 0.000 claims description 5
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 5
- 238000001953 recrystallisation Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000009477 glass transition Effects 0.000 claims description 2
- 230000001747 exhibiting effect Effects 0.000 claims 1
- 239000003960 organic solvent Substances 0.000 claims 1
- 229910052709 silver Inorganic materials 0.000 description 38
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 35
- 239000004332 silver Substances 0.000 description 34
- 238000005452 bending Methods 0.000 description 19
- 235000012431 wafers Nutrition 0.000 description 13
- 239000002245 particle Substances 0.000 description 10
- 239000004065 semiconductor Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000009792 diffusion process Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000007639 printing Methods 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 239000004575 stone Substances 0.000 description 5
- PCTMTFRHKVHKIS-BMFZQQSSSA-N (1s,3r,4e,6e,8e,10e,12e,14e,16e,18s,19r,20r,21s,25r,27r,30r,31r,33s,35r,37s,38r)-3-[(2r,3s,4s,5s,6r)-4-amino-3,5-dihydroxy-6-methyloxan-2-yl]oxy-19,25,27,30,31,33,35,37-octahydroxy-18,20,21-trimethyl-23-oxo-22,39-dioxabicyclo[33.3.1]nonatriaconta-4,6,8,10 Chemical compound C1C=C2C[C@@H](OS(O)(=O)=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2.O[C@H]1[C@@H](N)[C@H](O)[C@@H](C)O[C@H]1O[C@H]1/C=C/C=C/C=C/C=C/C=C/C=C/C=C/[C@H](C)[C@@H](O)[C@@H](C)[C@H](C)OC(=O)C[C@H](O)C[C@H](O)CC[C@@H](O)[C@H](O)C[C@H](O)C[C@](O)(C[C@H](O)[C@H]2C(O)=O)O[C@H]2C1 PCTMTFRHKVHKIS-BMFZQQSSSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000002019 doping agent Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000001856 Ethyl cellulose Substances 0.000 description 3
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical group CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 3
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 229920001249 ethyl cellulose Polymers 0.000 description 3
- 235000019325 ethyl cellulose Nutrition 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 229910052707 ruthenium Inorganic materials 0.000 description 3
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000006071 cream Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007572 expansion measurement Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 239000000052 vinegar Substances 0.000 description 2
- 235000021419 vinegar Nutrition 0.000 description 2
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 102100035353 Cyclin-dependent kinase 2-associated protein 1 Human genes 0.000 description 1
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- BGYBTGDDOPTJSB-UHFFFAOYSA-N acetic acid;ethane-1,2-diol Chemical compound CC(O)=O.OCCO BGYBTGDDOPTJSB-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000005354 aluminosilicate glass Substances 0.000 description 1
- 239000006117 anti-reflective coating Substances 0.000 description 1
- 239000005391 art glass Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- XKLVLDXNZDIDKQ-UHFFFAOYSA-N butylhydrazine Chemical compound CCCCNN XKLVLDXNZDIDKQ-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000002003 electrode paste Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910000449 hafnium oxide Inorganic materials 0.000 description 1
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000007649 pad printing Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920002098 polyfluorene Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- YBCAZPLXEGKKFM-UHFFFAOYSA-K ruthenium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Ru+3] YBCAZPLXEGKKFM-UHFFFAOYSA-K 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- PWEBUXCTKOWPCW-UHFFFAOYSA-N squaric acid Chemical compound OC1=C(O)C(=O)C1=O PWEBUXCTKOWPCW-UHFFFAOYSA-N 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 235000013618 yogurt Nutrition 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C14/00—Glass compositions containing a non-glass component, e.g. compositions containing fibres, filaments, whiskers, platelets, or the like, dispersed in a glass matrix
- C03C14/006—Glass compositions containing a non-glass component, e.g. compositions containing fibres, filaments, whiskers, platelets, or the like, dispersed in a glass matrix the non-glass component being in the form of microcrystallites, e.g. of optically or electrically active material
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
- C03C3/066—Glass compositions containing silica with less than 40% silica by weight containing boron containing zinc
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
- C03C3/072—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/02—Frit compositions, i.e. in a powdered or comminuted form
- C03C8/04—Frit compositions, i.e. in a powdered or comminuted form containing zinc
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/14—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
- C03C8/18—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions containing free metals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2214/00—Nature of the non-vitreous component
- C03C2214/08—Metals
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2214/00—Nature of the non-vitreous component
- C03C2214/16—Microcrystallites, e.g. of optically or electrically active material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Dispersion Chemistry (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Crystallography & Structural Chemistry (AREA)
- Ceramic Engineering (AREA)
- Photovoltaic Devices (AREA)
- Conductive Materials (AREA)
- Electrodes Of Semiconductors (AREA)
- Glass Compositions (AREA)
- Formation Of Insulating Films (AREA)
- Thin Film Transistor (AREA)
Description
1353062 九、發明說明: 【發明所屬之技術領域】 本發明主要係關於厚膜組合物、電極及半導體元件。其 進一步係關於矽半導體元件。詳言之,本發明係關於一種 用於形成太陽電池之厚膜電極的導電組合物。 【先前技術】 儘管本發明在諸如光電二極體及太陽電池之光接收元件 中尤其有效’但其亦可應用於多種半導體元件中。下文參 考作為先前技術之特定實例的太陽電池描述本發明之背 景。 具有p型基質之習知太陽電池結構具有一般位於電池前 側或太陽側之陰極,及位於後側之陽極。已熟知,落於半 導體物體之p-n接點上之適當波長的輻射在該物體中充當 產生電洞-電子對之外部能量源。存在於p_n接點處之電位 差引起電洞及電子以相反方向移動經過接點,且藉此引起 可向外部電路輸送電力之電流流動。大部分太陽電池為經 金屬化之矽晶圓形式,意即經與具有導電性之金屬接觸而 提供。 在形成太陽電池期間,A1膏通常經絲網印刷,且於石夕晶 圓之後側上乾燥。隨後使晶圓在高於A1熔點之溫度下燃燒 以形成ANSi㈣物’之後在冷卻相期間,形成經μ接雜之 矽的磊晶成長層。該層通常稱為背面電場(bsf)層,且有 助於改良太%電池之能量轉換效率。 目月J所使用之大部公连社雷台J:: 丨刀屋生電迠的太陽電池為矽太陽電 11l870.doc 1353062 池。大規知生產中之生產流程通常旨在達成最大程度之簡 化及生產成本之最小化。詳言之,電極係藉由使用諸如絲 網印刷之方法自金屬膏而製成。 下文結合圖1描述該生產方法之實例。圖!展示p型石夕義 板,1 0。 土 在圖1(B)中,藉由熱擴散碌(p)或其類似物而形成反向導
電&散層’ 2G。通常使㈣醯氯㈣叫作為氣相 磷擴政源,其他液體源為鱗酸及其類似物。在不存在任何 特定改質時,切基㈣之整個表面上形成擴散㈣。此 擴散層具有每平方數十歐姆(Ω/口)級別之薄片電阻率,及 ㈣至0.5 _之厚度。當ρ型摻雜劑之濃度等於㈣推雜劑 之濃度時,形成”接點’ ρ_η接點靠近太陽側之習知電池 具有介於0.05與0.5 μηι之間之接點深度。
、:形成此擴散層之後’藉由以諸如氫氟酸之酸餘刻而將 過里表面玻璃自表面之剩餘部分移除。接著,#由諸如電 漿化學氣相沉積(CVD)之方法,以圖1(D)中所示之方式, 形成厚度介於0.05與(M _之間,作為n型擴散㈣上:抗 反射塗層的氮化石夕膜3 〇。 如圖UE)所示’前電極之銀膏5〇〇經絲網印刷,隨後瘦 氮化㈣30乾燥。此外,後健或銀及料峨 後經絲網印刷(或一些其他塗覆方法),且隨後在基板後側 上乾燥。後側銀或銀/銘通常首先於石夕上經絲網印刷為用 於焊接互連束(經預焊接之銅帶)之兩平行條或矩形,鋁隨 後經印刷於裸區’其與銀或銀,鋁少許重疊。纟某些情況 111870.doc 下,在印刷鋁之後印刷銀或銀/鋁。隨後一般在紅外線熔 爐中在大,力700至950。(:之溫度範圍内進行燃燒歷時數秒 鐘至數十分鐘。可相繼或同時燃燒前及後電極。 隨後’如圖1 (F)所示,在燃燒過程期間,來自膏之炫融 紹冷解珍’幻遺後在冷卻期間摻雜自石夕基質㈣晶成長之 矽形成含有尚濃度鋁摻雜劑之p+層4〇。該層通常稱為背 面電場(BSF)層’且有助&改良太陽電池之能量轉換效 率。 藉由自乾燥狀態60燃燒為鋁後電極61來轉化鋁膏。當形 成粒子時’先前技術之後側鋁膏一般利用來源於霧化過程 之顯著球㈣粒子’且其中不區別粒子尺寸及外形。後側 銀或銀/鋁膏70同時燃燒,成為銀或銀/鋁後電極”。在燃 燒期間,後側鋁與後側銀或銀/鋁之間的邊界呈現合金狀 態,且亦電連接。鋁電極佔據後電極之大部分面積,其部 分係由於需要形成p +層4〇。因為不可能焊接至鋁電極,所 以在後側部分上(通常為2.6麵寬之^流排)形成銀或銀成 後電極,作為借助於經預焊接之銅帶或其類似物與太陽電 池互連之電極。此外,在燃燒期間,形成前電極之銀膏 5〇〇燒結且滲透穿過氮化矽膜3〇,且藉此可與n型層2〇電接 觸。此類型之過程通常稱為"燃燒穿過圖1(F)之層5〇1中 明顯可見此經燃燒穿過之狀態。 此外’儘管習知太陽電池提供工作設計,但仍需要提供 較高效率之元件。亦需要提供一種在比先前技術更低之溫 度下形成此it件之方法。該方法可允許在較廣之溫度範圍 UI870.doc 1353062 内k Μ為製造者提供増進之靈活性,且 及較薄晶圓源之埶工作^ ^ 了補仂較厚 法。 "、、作。本發明提供此元件及其形成方 此外,正在進行努力 元件之電學效能及盆他相… 而同時維持 組合物,及… 本發明者創造新穎含銘 半導體元件,以及提#優^@ #料電干效能之 ^ + ^ 供優良電學效能之新穎組合物。此 卜,本發明之組合物在本發 少。 I月之某些貫施例中引起彎曲減 【發明内容】 本:明係關於一種用於形成㈣電極之厚膜導體組合 ,二進—步係關於形成該等組合物之方法,及該組合物 在半導體元件中及半導體元件本身之用途。 本發明係關於-種厚膜導體組合物,其包含:⑷含紹粉 末,(b)至少一種玻璃粉組合物;其分散於(⑽機介質 中,其中該玻璃粉組合物在燃燒之後經受再結晶過程,且 釋放玻璃及結晶相,且其中該再結晶過程之該玻璃相包含 具有低於該玻璃粉組合物之原始軟化點之軟化點的玻璃。 本發明進-步係關於一種利用具有p型及η型區域及㈣ 接點之矽基板形成太陽電池之方法,該方法包含絲網印刷 該基板之後侧,絲網印刷如上文詳述之組合物,且在5〇〇_ 990°C之溫度下燃燒經印刷表面。 【實施方式】 本發明之厚膜組合物的主要組份為含紹粉末、玻璃粉及 HJ870.doc 〇 1353062 =太Γ貫施例中,組合物中之玻璃粉為無-玻璃 效且:物:本發明之組合物賦予與先前技術相比更優之電學 :…4組合物亦提供與先前技術系統相比較低之彎 含鋁粉末 金屬粉末為含_末。在—實施财,含紹粉 霧化之紹。可在空氣或惰性氣氛下霧化經霧化之 内二務化紹粉末之平均粒徑分佈在3至5。微米之範圍 内。』粉末之平均粒徑分佈在3至2〇微来之範圍内。 本發明之含鋁粉末可進—步 銀粉末。 4心其他金屬粉末’諸如含 無機黏合劑-玻璃粉 本文以上所述之含銘粉末良好分散於有機媒介中,且另 1:;=Γ無機黏合劑,言之,可用於本發明之 =黏::為玻璃粉;本發明必須包含至少-種破璃粉組 〃在燃燒之後,該玻璃粉組合物經受再处Β 分離並釋放具有分離相之玻璃料, 2阳或相 斂仆fi夕私k /圾碉科具有低於原始 工後rZ 因此’包含此玻璃粉之厚膜組合物經加 工後仔到較低之f曲特性。玻璃粉組合物之原始軟化點一 般在325。〇至600°c之範圍内。 實施例尹,本發明之玻璃粉為無外破^粉,其 燒之後經受再結晶或相分離並釋放具有分離相之破:.、 »亥玻璃料具有低於原始軟化點之軟化點。可能為 玻璃料之混合物。 A夕種 H1870.doc 1353062 無機黏合劑在結組合物中之功能主要在⑨提供增加效率 之方式,藉由此效率在燃燒過程期間由炫融紹來評估石夕。 除此功能之外,黏合劑提供額外與基板之内聚及黏著特 性。在此情況下,對於具有作為晶圓加工剩餘物之二氧化 石夕層或石夕質玻璃的石夕基板而言’最重要的是需要無機黏合 劑。無機黏合劑影響原裝電池中鋁層的管曲。黏合劑亦可 i曰加鋁於矽中之合金化深度,因此增強或增加共晶成長矽 層中之鋁摻雜劑濃度。 重要的是本發明之玻璃粉的化學性質。基於玻璃粉改良 鋁厚膜膏之電學效能的有效性,而不違背其他考慮因素來 選擇玻璃粉’該等考慮、因素諸如環境法規或公眾需求以排 除潛在私境顧慮之重金屬。 作為無機黏合劑之玻璃粉的含量較為重要,因為其影響 所得電池之電學效能。藉由玻璃或無機物含量確定此含 畺,且其基於總厚膜組合物計介於〇. 〇丨重量。與5重量%之 間,視玻璃粉之化學性質而定,對於電學效能及彎曲而言 之較佳水平在0.01重量❶/〇至2重量❶/〇之範圍内。 此項技術中已知可用於組合物中之玻璃黏合劑。一些實 例包括硼矽酸鹽及鋁矽酸鹽玻璃。實例進一步包括氧化物 之組合,諸如 B2〇3、Si〇2、Al2〇3、Cd0、Ca〇、Ba〇、
ZnO、Si02、Na2〇、Li2〇、抑〇及Zr〇,其可單獨或組合使 用以形成玻璃黏合劑。已知可用於厚膜組合物中之典型金 屬氧化物,且可為(例如)Zn〇、Mg〇、c〇〇、Ni〇、Fe〇、
MnO及其混合物。影響彎曲特性之玻璃黏合劑在組合物中 111870.doc 具有特異性。 圭使用之習知玻填粉為棚石夕酸鹽玻璃料,諸如删石夕酸 j玻璃料、卿酸⑭玻璃料、财㈣麵料、㈣酸領 玻璃料、棚石夕酸妈玻璃料或其他鹼土金屬硼石夕酸睡玻璃 枓°熟知該等玻璃粉之製備,且例如由以下步驟 一 起炫融呈氧化物組份形式之玻璃組份,且將該溶融組合物 傾入水中以形成玻璃料。當然,批量成分可為在玻璃料生 f之普通條件下產生所需氧化物之任何化合物。舉例而 言,可自侧酸獲得氧化爛,可自縫石產生二氧化石夕,可自 碳酸鋇產生氧化鋇等。 玻璃較佳在球磨機中以水或惰性低黏度、低彿點有機液 體研磨以減小玻璃料之粒徑,並獲得A體上均—尺寸之玻 璃料。其隨後在水巾或該有機液體中沉心分離精細物 質,且移除含有該等精細物質之上清流體。亦可使用其他 分類方法。 ~ 藉由習知玻璃生產技術,藉由以所需比率混合所需組份 且加熱混合物以形成熔融物來製備玻璃。如此項技術所熟 知,在峰值溫度下進行加熱且歷時一定時間以使熔融物變 為70全液體且均勻。所需玻璃轉移溫度在325°C至600°C之 範圍内。 杈佳為至少85%無機黏合劑粒子為0.1 -1 Ο μηι。此原因在 於具有大表面積之較小粒子傾向於吸附有機物質,且因此 阻止清潔分解。另一方面,較大尺寸之粒子傾向於具有較 差的燒結特徵。無機黏合劑與總膏含量之重量比較佳在 I11870.doc 1353062 Ο.1至-2.0之範圍内,且更佳在0.2至1.25之範圍内。 有機介質 一般藉由機械混合將無機組份與有機介質混合以形成稱 為”膏”之黏性組合物’其具有合適之稍度及流變性以供印 刷。多種惰性黏性物質可用作有機介質。有機介質必須為 其中無機組份可以足夠之穩定程度分散的有機介質。介質 之流變學特性必須在於其賦予該組合物良好之塗覆特性, 包括.固體之穩定分散、適當之黏度及觸變性以供絲網印 刷、基板及膏固體之適當可濕性、良好的乾燥速率及良好 的燃燒特性。用於本發明之厚膜組合物中之有機媒劑較佳 為=水惰性液體。可使用任何可含有或可不含有增稍劑、 I、疋劑及/或其他普通添加劑之各種有機媒劑。有機介質 -般為聚合物於溶劑中之溶液。此外,少量諸如界面活性 $之添加射為有機介質之—部分。為達成此目的,最經 :使用之聚合物為乙基纖維素。亦可使用之聚合物之其他 實=包括乙基輕乙基纖維素、木松香、乙基纖維素與盼系 ,脂,混合物'低碳醇之聚甲基丙烯酸酯及乙二醇單乙酸 …單丁基ϋ。發現在厚膜組合物中最廣泛使用之溶劑為 醋酵及結類’諸如α部結品醇或其與其他溶劑之混合 ::其他溶劑諸如煤油、鄰苯二甲酸二丁醋、丁基卡必 :丁基卡必醇乙酸_二醇及高滞,點醇及醇醋。此 。用於在塗覆於基板上之後促進快速硬化之揮發性液體 二 於嫖劑中。5亥等及其他溶劑之各種組合經調配以獲 得所需之黏度及揮發性要求。 ni870.doc
-13- ·- S 1353062 百機介質中所存在之窀 重量w本發明=物之0重量。如】 物之介質調節為預定;::::合物可經含有有機聚合 J,,.乐網印刷之黏度。 厚膜組合物中之有機介質與分 取決於塗覆膏之方法及所用有 ::,二比率 ,, 、 q揭為之種類,且其可鑤 化:散液通常含有4"5重量%之無機組份及 之有機介質(媒劑)以獲得良好濕濁。 。
在申凊專利範圍内,當認為在280<5(:與90代之間提供放 熱化學反應之聚合物或有機物質或無機物質對於經摻雜石夕 系統之半導體特性而言非毒物時’發現該等物質對於系統 之總體效能有益。 ’' · ,發明之導電膏—般藉由粉末混合來便利製造,亦可使 用等同於傳統㈣法、輥壓法或其他混合技術之分散技 術。本發明之導電膏較佳藉由絲網印刷而塗佈於太陽電池 背面之所需部分上;在以此方法塗佈中,較佳具有規定範 圍内之黏度。可使用其他塗覆方法,諸如聚矽氧墊印刷。 當使用布絡克菲爾德(Brookfield)HBT黏度計及#14軸藉由 效用杯在10 rpm之軸速及25。〇下量測時,本發明之導電膏 的黏度較佳為20-200 PaS。 在稱為共燃燒之製程中,銀/鋁或銀膜可與本發明之鋁 膏同時共燃燒。接著,參照圖(圖2),解釋其中使用本發明 之導電膏(鋁導電膏)製備太陽電池之實例。 首先,製備Si基板102。在Si基板之光接收側面(表面) 上,P-n接點通常靠近表面,安裝電極(例如,主要由Ag組 111870.doc -14- 1353062 成之電極)Η)·2(Α))。在基板之背面上,塗佈Ag^g/Ai 導電膏(儘管在其用於太陽電池時不特別限制,例如pv2〇2 或PV502或PV58wPV581(可賭自£^ p〇nt心心则阳 及C〇nipany))以形成匯流排或接頭片以可與其他電池組以 平行電學組態互連。在基板之背面上,使用可使得與上文 提及之導電Ag或Ag/A1膏等少許重疊之模式,藉由絲網印 刷來塗佈本發明之用作太陽電池後面(或p型接觸件)電極之 新穎鋁膏106’隨後乾燥(圖2(B)卜在靜態乾燥器中,各種 膏之乾燥溫度較佳為15(TC或更低歷時2〇分鐘或7分鐘,在 溫度高於200t之帶式乾燥器中歷時3分鐘(DEK乾燥器i2〇9 型設置:燈設置9及速度3)。鋁膏亦較佳具有厚度為15_6〇 μπι之乾燥膜,且本發明之銀/鋁導電膏之厚度較佳為丨^^^ μη。鋁膏與銀/鋁導電膏之重疊部分亦較佳為約〇 5_2 5 mm ° 接著,例如在70(M〇〇(TC之溫度下燃燒所獲基板歷時約 3秒鐘-15分鐘,以獲得所需之太陽電池(圖2(D))。自本發 明之組合物形成電極,其中該組合物已經燃燒以移除有機 介質且燒結玻璃粉。 如圖2(D)所示,使用本發明之導電膏所獲得之太陽電池 具有位於基板(例如,Si基板)1〇2之光接收面(表面)上之電 極1 04主要由A丨組成之AI電極11 〇,及位於後面上之主要 由A g及A1組成之銀/紹電極11 2。 將藉由給出實施實例來進一步詳細討論本發明。然而, 本發明之範疇並不以任何方式受該等實施實例之限制。 111870.doc 實例 本文所引用之實例係基於在具有氮化石夕抗反射塗層之晶 圓上燃燒該等實例膏,且為具有前紙型接觸厚膜銀膏之 習知電池設計。根據電學特性且另外根據燃燒後電池之彎 曲來界定膏之效能(界定為室溫下經燃燒電池之偏轉,及 在晶圓中心穿越至抵達平面電池之距離)。 (1)具有玻璃粉之鋁膏 本文描述鋁粉與玻璃粉之混合物。相對於鋁粉含量及粒 徑之相對玻璃含量影響較薄電池之電學特性及彎曲程度。 在此貫例中,吾人引用四(4)種玻璃組合物,其中三種 為硼矽酸鉛組合物,而一種為不含鉛之玻璃。該等系統之 區別在於A及B為可軟化及凍結之玻璃系統’ c及d軟化, 但在冷卻期間内可結晶,玻璃C將保持液體直至溫度低於 350C時。玻璃A代表先前技術之玻璃組合物。玻璃b、c 及D代表新賴厚膜組合物中所包含之玻璃。 表1所引用之玻璃組合物 氧化物之重量% A B C D Si〇2 5.40 6.00 3.50 32.72 Al2〇3 4.10 PbO 78.10 80.50 42.40 Zr02 2.90 B2O3 12.40 12.00 3.60 2.90 ZnO 1.50 2.91 111870.doc •16-
MgO 1.17 Ti〇2 5.23 Na20 3.10 Li2〇 0.87 Bi203 50.50 48.20 a 9.2 10.5 18.6 12.9 膨脹測定軟化點(°c) 400 365 404 460 a=膨脹溫度係數(ppm/K) 以與製造銘膏之技術相同之方式將該等玻璃混合於來自 Silbedine (UK)Ltd之含有鋁粉的產物[2〇261中。基於鋁粉 之74重量。/。計’以重量計加入之玻璃料a、b、C及D在 0.25%與2.5%之間變化,且隨後在27〇微米厚之晶圓上印刷 為125 mm1之多晶矽,其經預加工至當下一步驟為印刷及 燃燒時。藉由在Centrotherm 4區域熔爐中燃燒而將晶圓轉 化為電池,其區域溫度界定為區域l=45〇〇c、區域 111870.doc 1 = 520°C、區域3 = 575°C且最終區域設置為925。(:或950。(:, 其帶速為2500 mm/min。進行電學效能及彎曲量測,表2及 表3展示效率之量測,且表4及表5展示填充因子(FF),且 表6展示彎曲。 由Young等人(PVSEC大會New Orleans)所報導之著作鹿 注思到’當存在電學效能嚴重降低之一點時,若重量低於 此值,則在電學效能與重量沉積(或厚度)之間存在關係, 因此在以大於此所謂飽和值之厚度印刷膏時,在表7中報 1353062 導該層之厚度。
表2 925°C之峰值溫度下的效率(%) N型導體有機物% A1% 玻璃料% A B C D PV147 26.0 74 0 13.09 13.09 13.09 13.09 PV147 25.7 74 0.3 12.97 12.94 13.26 13.40 PV147 25.5 74 0.5 13.31 13.44 13.50 13.22 PV147 25.0 74 1 13.14 13.27 13.28 13.10 PV147 24.5 74 1.5 13.35 13.18 13.21 13.45 PV147 23.5 74 2.5 13.01 13.46 13.11 12.37
表3 950°C之峰值溫度下的效率(%) N型導體有機物% A1·% 玻璃料% A B C D PV147 26.0 74 0 12.88 12.88 12.88 12.88 PV147 25.7 74 0.3 13.25 12.85 12.87 13.28 PV147 25.5 74 0.5 13.29 13.10 13.22 13.13 PV147 25.0 74 1 13.30 13.10 13.35 13.40 PV147 24.5 74 1.5 13.33 13.25 13.19 13.22 PV147 23.5 74 2.5 12.80 13.08 13.04 13.07 表4 925°C之峰值溫度下的填充因子(%) N型導體有機物% A1% 玻璃料% A B C D PV147 26 74 0 70.76 70.76 70.76 70.76 PV147 25.7 74 0.3 69.98 71.01 72.38 72.32 PV147 25.5 74 0.5 71.26 71.88 72.23 72.85 PV147 25 74 1 70.95 72.34 72.30 71.68 PV147 24.5 74 1.5 72.43 72.85 71.93 72.35 PV147 23.5 74 2.5 71.16 73.07 72.07 68.29 111870.doc -18- 示心粉中單獨加入玻璃一、C及 燃燒溫二:數學效能。效能為玻璃粉含量、… 产::雙金屬條模型’預期與基板具有增加差異之膨脹严 方將有的物貝可預期具有較大彎曲,且增加凍結點之物質 亦將有助於姑士 4該1 初質 士 、 。對於向系統中增加加入破螭料 D ’預叶雙金屬條模型之弯曲可變得更大。雙金屬條 差方程式由下式給出: δ = ^ΖΓ7-逆〔^gf-T)(tb + ta)d2 其中δ為偏差(m)、L為頂層厚度(m)、ib為底層厚度(m)、心 為床結溫度(。〇、Γ為量測溫度fC)、%為頂部組份之 TCE(l〇 6 κ·1)、%為底部組份之tce(10_6 K·11)、£a為頂部 組份之彈性模數(Pa)、五6為底部組份之彈性模數(Pa)且d為 較小組份之寬度(m)。 表8具有作為玻璃含量。/。函數之膨脹溫度係數數據 (以ppm/K計)及軟化數據。C(SP)的玻璃A、B、C及 D之270 μηι厚之晶圓的弩曲數據(以微米計) 玻璃料 α SP 0% 0.3% 0.5% 1% 1.5% 2.5% A 9.2 400 655 551 570 772 852 1053 B 10.5 365 655 530 610 818 850 1031 C 18.6 404 655 499 528 637 733 957 D 12.9 460 655 538 556 565 460 388 111870.doc -20- 因此在本文引用之實例中,可見: -符合雙金屬條之預測的增加玻璃料的彎曲程度一般增 加0 _與石夕(2.4 PPm/K)相比,預期具有較高CX之玻璃的彎曲程 度將增加。由於彎曲較小,因此玻璃。及D不遵循雙金 屬模型之預期特性。 -當玻璃之軟化點增加時,彎曲程度減小。由於彎曲小於 較低軟化點系統,因此玻璃〇及D不遵循雙金屬模型之 此預期特性。 -在低於0.5%添加下之彎曲程度可小於完全無玻璃之系 統,且為添加之特性,而非該等實例中所引用之玻璃料 化學性質。 -已知玻璃粉C及D在冷卻期間再結晶(相分離)為由與初始 添加至系統中之系統相比具有較低軟化點或凌結點之相 ° 包圍之玻璃内的結晶沉澱物。圖4表示作為軟化點(t)函 數之彎曲。 如玻璃D所示,本文引用之結晶系統的彎曲程度可獨特 隨著玻璃料含量之增加而降低。在玻璃〇之情形下,大 約如圖5所示之膨脹測定跡線所示,在室溫與^ $〇它之間 α為負。系統促使與習知玻璃料相比較低之彎曲的能力 使得此系統在低於225微米厚度之矽電池中提供極低彎 曲,且因此使得生產者在燃燒後處理期間加以使用,且 由於處理難度而對模塊生產者提供較少之破壞傾向。圖 6表明每一經識別玻璃粉之27〇微米晶圓(125χΐ25 的 1353062 彎曲效能。 太陽電池之製造 儘管本發明在諸如光電二極體及太陽電池之光接收元件 中尤其有效,但其可應用於多種半導體元件中。下文討論 描述如何利用本發明之組合物來形成太陽電池。熟習此項 技術者認識到太陽電池形成之各種實施例均可用於本發 明。 使用所獲得之鋁導電膏,以以下順序形成太陽電池。 (1) 在具有位於前表面之銀電極之Si基板的背面上㈠列 如’ PV147 Ag組合物,可購自E. j du p〇nt仏心则⑽及
Company)印刷並乾燥。典型乾燥厚度在15至25微米之範圍 内。隨後,將Ag或Ag/Al膏(例如,PV202為Ag/Al組合 物’其可購自 Ε· I. du Pont de Nemours及 Company)印刷且 乾燥為5-6 mm寬之匯流排。隨後,將太陽電池之背面電極 的鋁膏(代表本發明之新穎組合物)經絲網印刷為3〇_6〇卩m 厚度之乾燥膜,提供鋁膜與Ag/Al匯流排兩邊緣各丨mm之 重豐’以確保電連續性。在燃燒之前乾燥鋁膏。 (2) 隨後在峰值溫度設置為gw至965t:之熔爐中燃燒經印 刷之BB圓歷時3秒鐘至1 〇分鐘’此取決於炫爐尺寸及溫度 設置。在燃燒之後形成太陽電池。 測試程序-效率 將根據上文所述方法構建之太陽電池置於市售IV測試器 中以供量測效率(IEET Ltd)。IV測試器中之燈以已知強度 模擬陽光’並照射電池之前表面,將印刷於電池前側之匯 111870.doc 22· 1353062 排連接至ιν測試器之多探針,且經由探針將電訊號傳輸 至電腦以供計算效率。 藉由使用標準前側接觸膏PV147 Ag導體製備太陽電池晶 圓("T 購自 E. I. du Pont de Nemours及 Company)。
將樣品印刷於由PV電池製造商供應之晶圓上,其經加 工至厚膜膏經塗覆且燃燒之時。隨後量測經加工晶圓之電 學效能。結果指示當添加至A1粉時,使用玻璃料A、B、c 及D相對於未燒結系統具有經改良之電學效能。 【圖式簡單說明】 圖UAHF)解釋說明半導體元件之製造的流程圖。 下文解釋圖nA)-(F)中所示之參考數字。 10 P型矽基板 氮化矽膜、氧化鈦臈或氧化矽膜 Ρ +層(背面電場,BSF)
30 40 60 61 70 71 500 501 形成於後側上之鋁膏 鋁後電極(藉由燃燒後側鋁膏而獲得) 形成於後側上之銀/鋁膏 銀/鋁後電極(藉由燃燒後側銀/鋁膏而獲得) 形成於前側上之銀膏 銀前電極(藉由燃燒前側銀膏而形成) 圖2⑷-(F)解釋使用本發明之導電膏製造太陽電池 造方法。下文解釋圖2中所示之參考數字。 10 矽基板 111870.doc
•23- i. S 1353062 60 第一電極之膏組合物 61 第一電極 70 第二電極之導電膏 71 第二電極 500 光接收表面側電極 圖3詳述作為a(ppm/K)之函數的彎曲。 圖4詳述作為軟化點之函數的彎曲。 圖5展示對於玻璃D之膨脹特徵的膨脹測定評估。
圖6詳述作為270微米晶圓内之玻璃粉百分比之函數的彎 曲。 【主要元件符號說明】 10 p型矽基板/矽基質 20 η型擴散層 30 氮化矽膜、氧化鈦膜或氧化矽膜 40 ρ +層(背面電場,BSF) 60 後側鋁膏
61 銘後電極 70 後側銀或銀/鋁膏 71 銀或銀/鋁後電極 500 前電極之銀膏 501 銀前電極 111870.doc -24-
Claims (1)
1353062
第095120144號專利申請案 中文申請專利範圍替換本(98年12月) 十、申請專利範圍: 1. 一種厚膜導體組合物,其包含: (a) 含鋁粉末, (b) 至少一種玻璃粉組合物,其分散於 (c) 有機介質中, 其中該玻璃粉組合物在燃燒後經受再結晶過程,且釋 放玻璃相及結晶相, 其中該再結晶過程之該玻璃相包含具有低於該玻璃粉 組合物之原始軟化點之軟化點的玻螭, 其中該原始軟化點係在3251至600。(:之範圍内, 其中以總厚膜組合物計,該總玻璃粉含量係在〇 〇 1重 量0/〇至5重量。/。之範圍内, 其中該玻璃粉組合物係無鉛玻璃粉組合物,及 其中該組合物進一步包含在2〇。(:至2〇〇它之溫度範圍 内展示負膨脹溫度係數之玻璃粉組合物。
3.如咕求項丨之厚膜導體組合物,其中該有機介質包含聚 合黏合劑及揮發性有機溶劑。 4.如請求項丨之厚膜導體組合物,其中在燃燒之後,該 合物提供介於280。(:與90(rC2間之放熱化學反應。
111870-981218.doc 1353062 一種利用具有P型及η型區域及p-n接點之矽基板形成太陽 電池之方法,其包含絲網印刷該基板之後側,絲網印刷 如請求項1之組合物,及在500至99〇t之溫度下燃燒該 經印刷之表面。 7. -種電極,其係、利用如請求们之厚膜導體組合物。 8· 一種太陽電池’其包含如請求項1之厚膜導體組合物 111870-981218.doc
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