KR100944300B1 - 알루미늄/몰리브덴 적층막의 에칭 방법 - Google Patents
알루미늄/몰리브덴 적층막의 에칭 방법 Download PDFInfo
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- KR100944300B1 KR100944300B1 KR1020047005396A KR20047005396A KR100944300B1 KR 100944300 B1 KR100944300 B1 KR 100944300B1 KR 1020047005396 A KR1020047005396 A KR 1020047005396A KR 20047005396 A KR20047005396 A KR 20047005396A KR 100944300 B1 KR100944300 B1 KR 100944300B1
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- acid
- weight
- metal film
- aluminum
- molybdenum
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- 238000005530 etching Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000005001 laminate film Substances 0.000 title description 3
- UNQHSZOIUSRWHT-UHFFFAOYSA-N aluminum molybdenum Chemical compound [Al].[Mo] UNQHSZOIUSRWHT-UHFFFAOYSA-N 0.000 title 1
- 229910052751 metal Inorganic materials 0.000 claims abstract description 65
- 239000002184 metal Substances 0.000 claims abstract description 65
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 32
- 239000000243 solution Substances 0.000 claims abstract description 31
- 238000002844 melting Methods 0.000 claims abstract description 26
- 230000008018 melting Effects 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000001039 wet etching Methods 0.000 claims abstract description 19
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 14
- 150000007524 organic acids Chemical class 0.000 claims abstract description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 13
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 12
- 239000011733 molybdenum Substances 0.000 claims abstract description 12
- 150000001768 cations Chemical class 0.000 claims abstract description 10
- 239000007864 aqueous solution Substances 0.000 claims abstract description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 60
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 57
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 30
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 23
- 235000011054 acetic acid Nutrition 0.000 claims description 19
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 16
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 8
- 150000001412 amines Chemical class 0.000 claims description 8
- 235000019260 propionic acid Nutrition 0.000 claims description 8
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- -1 aliphatic amines Chemical class 0.000 claims description 7
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 claims description 6
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 claims description 6
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 6
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 5
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims description 4
- 229910021529 ammonia Inorganic materials 0.000 claims description 4
- 150000003863 ammonium salts Chemical class 0.000 claims description 4
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 4
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims description 4
- WLJVNTCWHIRURA-UHFFFAOYSA-N pimelic acid Chemical compound OC(=O)CCCCCC(O)=O WLJVNTCWHIRURA-UHFFFAOYSA-N 0.000 claims description 4
- 125000001453 quaternary ammonium group Chemical group 0.000 claims description 4
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 claims description 4
- ARCGXLSVLAOJQL-UHFFFAOYSA-N trimellitic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C(C(O)=O)=C1 ARCGXLSVLAOJQL-UHFFFAOYSA-N 0.000 claims description 4
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 claims description 3
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 claims description 3
- 239000001530 fumaric acid Substances 0.000 claims description 3
- 229960004275 glycolic acid Drugs 0.000 claims description 3
- 229920000768 polyamine Polymers 0.000 claims description 3
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 claims description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 2
- WHUUTDBJXJRKMK-UHFFFAOYSA-N Glutamic acid Natural products OC(=O)C(N)CCC(O)=O WHUUTDBJXJRKMK-UHFFFAOYSA-N 0.000 claims description 2
- CKLJMWTZIZZHCS-REOHCLBHSA-N L-aspartic acid Chemical compound OC(=O)[C@@H](N)CC(O)=O CKLJMWTZIZZHCS-REOHCLBHSA-N 0.000 claims description 2
- WHUUTDBJXJRKMK-VKHMYHEASA-N L-glutamic acid Chemical compound OC(=O)[C@@H](N)CCC(O)=O WHUUTDBJXJRKMK-VKHMYHEASA-N 0.000 claims description 2
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 2
- 239000001361 adipic acid Substances 0.000 claims description 2
- 235000011037 adipic acid Nutrition 0.000 claims description 2
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 claims description 2
- 235000003704 aspartic acid Nutrition 0.000 claims description 2
- OQFSQFPPLPISGP-UHFFFAOYSA-N beta-carboxyaspartic acid Natural products OC(=O)C(N)C(C(O)=O)C(O)=O OQFSQFPPLPISGP-UHFFFAOYSA-N 0.000 claims description 2
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 claims description 2
- 235000015165 citric acid Nutrition 0.000 claims description 2
- 235000019253 formic acid Nutrition 0.000 claims description 2
- 235000013922 glutamic acid Nutrition 0.000 claims description 2
- 239000004220 glutamic acid Substances 0.000 claims description 2
- 239000004310 lactic acid Substances 0.000 claims description 2
- 235000014655 lactic acid Nutrition 0.000 claims description 2
- 229960000448 lactic acid Drugs 0.000 claims description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 2
- 239000011976 maleic acid Substances 0.000 claims description 2
- 239000001630 malic acid Substances 0.000 claims description 2
- 235000011090 malic acid Nutrition 0.000 claims description 2
- 235000006408 oxalic acid Nutrition 0.000 claims description 2
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 claims description 2
- 229960004889 salicylic acid Drugs 0.000 claims description 2
- 239000011975 tartaric acid Substances 0.000 claims description 2
- 235000002906 tartaric acid Nutrition 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 2
- 229960005261 aspartic acid Drugs 0.000 claims 1
- 229960004106 citric acid Drugs 0.000 claims 1
- 229960002989 glutamic acid Drugs 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 229940099690 malic acid Drugs 0.000 claims 1
- 229960001367 tartaric acid Drugs 0.000 claims 1
- VXAPDXVBDZRZKP-UHFFFAOYSA-N nitric acid phosphoric acid Chemical compound O[N+]([O-])=O.OP(O)(O)=O VXAPDXVBDZRZKP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 62
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 19
- 239000000908 ammonium hydroxide Substances 0.000 description 19
- 229910001182 Mo alloy Inorganic materials 0.000 description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- 229910000838 Al alloy Inorganic materials 0.000 description 13
- 229920002120 photoresistant polymer Polymers 0.000 description 11
- 238000001493 electron microscopy Methods 0.000 description 7
- 239000011521 glass Substances 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 5
- RWRDLPDLKQPQOW-UHFFFAOYSA-N Pyrrolidine Chemical compound C1CCNC1 RWRDLPDLKQPQOW-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 2
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 2
- BAVYZALUXZFZLV-UHFFFAOYSA-N Methylamine Chemical compound NC BAVYZALUXZFZLV-UHFFFAOYSA-N 0.000 description 2
- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical compound C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 description 2
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 229910021417 amorphous silicon Inorganic materials 0.000 description 2
- HQABUPZFAYXKJW-UHFFFAOYSA-N butan-1-amine Chemical compound CCCCN HQABUPZFAYXKJW-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- JQVDAXLFBXTEQA-UHFFFAOYSA-N dibutylamine Chemical compound CCCCNCCCC JQVDAXLFBXTEQA-UHFFFAOYSA-N 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- WGYKZJWCGVVSQN-UHFFFAOYSA-N propylamine Chemical compound CCCN WGYKZJWCGVVSQN-UHFFFAOYSA-N 0.000 description 2
- KIDHWZJUCRJVML-UHFFFAOYSA-N putrescine Chemical compound NCCCCN KIDHWZJUCRJVML-UHFFFAOYSA-N 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 2
- XFNJVJPLKCPIBV-UHFFFAOYSA-N trimethylenediamine Chemical compound NCCCN XFNJVJPLKCPIBV-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 1
- KIZQNNOULOCVDM-UHFFFAOYSA-M 2-hydroxyethyl(trimethyl)azanium;hydroxide Chemical compound [OH-].C[N+](C)(C)CCO KIZQNNOULOCVDM-UHFFFAOYSA-M 0.000 description 1
- RSEBUVRVKCANEP-UHFFFAOYSA-N 2-pyrroline Chemical compound C1CC=CN1 RSEBUVRVKCANEP-UHFFFAOYSA-N 0.000 description 1
- KXDHJXZQYSOELW-UHFFFAOYSA-N Carbamic acid Chemical class NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- GETQZCLCWQTVFV-UHFFFAOYSA-N anhydrous trimethylamine Natural products CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- ZFTFAPZRGNKQPU-UHFFFAOYSA-N dicarbonic acid Chemical class OC(=O)OC(O)=O ZFTFAPZRGNKQPU-UHFFFAOYSA-N 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- 229940043237 diethanolamine Drugs 0.000 description 1
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 1
- WEHWNAOGRSTTBQ-UHFFFAOYSA-N dipropylamine Chemical compound CCCNCCC WEHWNAOGRSTTBQ-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002763 monocarboxylic acids Chemical class 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- AOHJOMMDDJHIJH-UHFFFAOYSA-N propylenediamine Chemical compound CC(N)CN AOHJOMMDDJHIJH-UHFFFAOYSA-N 0.000 description 1
- ZVJHJDDKYZXRJI-UHFFFAOYSA-N pyrroline Natural products C1CC=NC1 ZVJHJDDKYZXRJI-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229940073455 tetraethylammonium hydroxide Drugs 0.000 description 1
- LRGJRHZIDJQFCL-UHFFFAOYSA-M tetraethylazanium;hydroxide Chemical compound [OH-].CC[N+](CC)(CC)CC LRGJRHZIDJQFCL-UHFFFAOYSA-M 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
- 150000003628 tricarboxylic acids Chemical class 0.000 description 1
- 229940086542 triethylamine Drugs 0.000 description 1
- GETQZCLCWQTVFV-UHFFFAOYSA-O trimethylammonium Chemical compound C[NH+](C)C GETQZCLCWQTVFV-UHFFFAOYSA-O 0.000 description 1
- YFTHZRPMJXBUME-UHFFFAOYSA-N tripropylamine Chemical compound CCCN(CCC)CCC YFTHZRPMJXBUME-UHFFFAOYSA-N 0.000 description 1
- 229960004418 trolamine Drugs 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/20—Acidic compositions for etching aluminium or alloys thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/3063—Electrolytic etching
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/26—Acidic compositions for etching refractory metals
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
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- Power Engineering (AREA)
- ing And Chemical Polishing (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
Abstract
Description
발명을 실시하기 위한 최선의 형태
본 발명에 사용된 습식 에칭(wet etching)액은 인산,질산,유기산 및 양이온을 생성하는 물질을 함유하는 수용액이다.
인산의 농도는 습식 에칭액의 50∼80 중량%,바람직하게는 60∼75 중량%이다. 인산은 주로 A1계 금속막의 에칭에 기여하는 것이고, 50 중량% 미만이면 A1계 금속막의 에칭 속도가 느려지고,또한 80 중량%를 초과하면 A1계 금속막의 에칭 속도가 너무 빨라져 바람직하지 않다. 또, 본 발명에 있어서 「Al계 금속막」이란 알루미늄막 및 알루미늄 함량이 80 중량% 이상인 알루미늄 합금막을 말한다.합금 원소로는 Nd, Zr, Cu, Si 등을 들 수 있다.
질산의 농도는 습식 에칭액의 0.5∼10 중량%,바람직하게는 1∼8 중량%이다. 질산은 주로 Mo계 고융점 금속막의 에칭에 기여하는 것이고, 0.5 중량% 미만이면 Mo계 고융점 금속막의 에칭 속도가 느려지고,10 중량%를 초과하면 Mo계 고융점 금속막의 에칭 속도가 너무 빨라져 바람직하지 않다. 또, 본 발명에 있어서「Mo계 고융점 금속막」이란 몰리브덴막 및 몰리브덴 함량이 80 중량% 이상인 몰리브덴 합금막을 말한다. 합금 원소로는 W 등을 들 수 있다.
유기산으로는 포름산(formic acid),아세트산(acetic acid),프로피온산 (propionic acid),부티르산(butyric acid) 등의 모노카르복실산(monocarboxylic acid)류; 옥살산(oxalic acid), 말론산(malonic acid),숙신산(succinic acid),글루타르산(glutaric acid),아디프산(adipic acid), 피멜린산(pimelic acid),말레인산(maleic acid),푸마르산(fumaric acid),프탈산(phthalic acid) 등의 디카르복실산(dicarboxylic acid)류; 트리멜리트산(trimellitic acid) 등의 트리카르복실산(tricarboxylic acid)류; 히드록시초산(hydroxyacetic acid),유산(lactic acid), 살리실산(salicylic acid) 등의 옥시모노카르복실산(oxymonocarboxylic acid)류; 사과산(malic acid),주석산(tartaric acid) 등의 옥시디카르복실산 (oxydicarboxylic acid); 구연산(citric acid) 등의 옥시트리카르복실산 (oxytricarboxylic acid)류; 아스파라긴산(aspartic acid),글루타민산(glutamic acid) 등의 아미노카르복실산(aminocarboxylic acid)류를 들 수 있다.
유기산의 농도는 습식 에칭액의 0.5∼10 중량%,바람직하게는 5∼8 중량%이다. 유기산의 농도는 인산,질산의 농도 또는 에칭 조건 등에 의해 적절히 결정하면 된다.
양이온을 생성하는 물질로는 암모니아; 수산화암모늄 등의 암모늄염; 메틸 아민, 디메틸 아민, 트리메틸 아민,에틸 아민,디에틸 아민,트리에틸 아민,프로필 아민,디프로필 아민,트리프로필 아민, 부틸 아민,디부틸 아민,트리부틸 아민 등의 지방족 아민류; 모노에탄올 아민,디에탄올 아민,트리에탄올 아민 등의 알칸올 아민류; 에틸렌 디아민,프로필렌 디아민,트리메틸렌 디아민,테트라메틸렌 디아민 등의 폴리아민류; 피롤(pyrrole), 피롤린(pyrroline), 피롤리딘(pyrrolidine),몰포린(morpholine) 등의 환식(cyclic) 아민류; 및 테트라메틸 암모늄 수산화물,테트라에틸 암모늄 수산화물,트리메틸(2-히드록시에틸) 암모늄 수산화물 등의 제4급 암모늄 수산화물을 들 수 있다.또한,상기 암모니아, 아민, 제4급 암모늄 수산화물 외에 수산화나트륨,수산화칼륨 등의 알칼리 금속염도 양이온을 생성하는 물질로서 사용된다.상기 양이온을 생성하는 물질 중 암모늄염이 특히 바람직하다.
상기 양이온을 생성하는 물질의 농도는 습식 에칭액의 0.1∼20 중량%,바람직하게는 1∼10 중량%이다.O.1 중량% 미만이면 에칭액의 수명이 짧아지고,또한 20 중량%를 초과하면 Mo계 금속막,Al계 금속막의 에칭 속도가 느려져서 바람직하지 않다.
본 발명에 있어서 습식 에칭액의 최적 수분 함유량은 에칭하는 금속막의 종류,조성에 의해 고유의 범위로 되기 때문에 실제로 사용하는 금속막마다 적절히 결정할 필요가 있지만,통상 l0∼30 중량%의 범위가 바람직하다. 예를 들면,Mo 등의 고융점 금속막/A1계 금속막을 습식 에칭하는 경우의 수분 함량은 15∼20 중량%,바람직하게는 16∼19 중량%이고,Mo 등의 고융점 금속막/A1계 금속막/Mo 등의 고융점 금속막을 습식 에칭하는 경우의 수분 함량은 18∼23 중량%,바람직하게는 19∼22 중량%이다.
에칭 조건은 특별히 한정되지 않고,종래 공지의 조건을 채용할 수 있다. 예를 들면,상온(20∼25℃)∼50℃에서 0.5∼3분간 금속막을 습식 에칭액에 접촉시킴으로써 행하여지나, 에칭 조건은 사용된 적층막의 종류,두께 등으로부터 감안하여 적절히 결정하면 된다.
Claims (11)
- 삭제
- 기판 위에 형성한 알루미늄계 금속막 및 상기 알루미늄 금속막 위에 형성한 몰리브덴계 고융점 금속막으로 이루어지는 적층막을, 인산(phosphoric acid); 질산(nitric acid); 유기산(organic acid); 및 양이온을 생성하는 물질로서 암모니아, 암모늄염, 지방족 아민류, 알칸올 아민류, 폴리아민류, 환식 아민류, 제4급 암모늄 수산화물로 이루어진 군으로부터 선택되는 적어도 하나의 화합물을 함유하는 수용액으로 이루어진 습식 에칭(wet etching)액에 수분 함유량을 15∼20 중량%로 유지하면서 접촉시키는 것을 특징으로 하는 에칭 방법.
- 삭제
- 기판 위에 형성한 몰리브덴계 고융점 금속막,상기 몰리브덴계 고융점 금속막 위에 형성한 알루미늄계 금속막 및 상기 알루미늄계 금속막 위에 형성한 몰리브덴계 고융점 금속막으로 이루어지는 적층막을, 인산(phosphoric acid); 질산(nitric acid); 유기산(organic acid); 및 양이온을 생성하는 물질로서 암모니아, 암모늄염, 지방족 아민류, 알칸올 아민류, 폴리아민류, 환식 아민류, 제4급 암모늄 수산화물, 알칼리 금속염으로 이루어진 군으로부터 선택되는 적어도 하나의 화합물 0.1~20 중량%를 함유하는 수용액으로 이루어진 습식 에칭(wet etching)액에 수분 함유량을 18∼23 중량%로 유지하면서 접촉시키는 것을 특징으로 하는 에칭 방법.
- 삭제
- 제 2 항 또는 제 4 항에 있어서,상기 인산의 농도는 습식 에칭액의 50∼80 중량%인 것을 특징으로 하는 에칭 방법.
- 제 2 항 또는 제 4 항에 있어서,상기 질산의 농도는 습식 에칭액의 0.5∼10 중량%인 것을 특징으로 하는 에칭 방법.
- 제 2 항 또는 제 4 항에 있어서,상기 유기산은 포름산(formic acid),아세트산(acetic acid),프로피온산 (propionic acid),부티르산(butyric acid), 옥살산(oxalic acid), 말론산(malonic acid),숙신산(succinic acid),글루타르산(glutaric acid),아디프산(adipic acid), 피멜린산(pimelic acid),말레인산(maleic acid),푸마르산(fumaric acid),프탈산(phthalic acid), 트리멜리트산(trimellitic acid), 히드록시초산 (hydroxyacetic acid),유산(lactic acid), 살리실산(salicylic acid), 사과산 (malic acid),주석산(tartaric acid), 구연산(citric acid), 아스파라긴산 (aspartic acid) 및 글루타민산(glutamic acid)으로 이루어진 군으로부터 선택되는 적어도 하나의 산인 것을 특징으로 하는 에칭 방법.
- 제 2 항 또는 제 4 항에 있어서,상기 유기산의 농도는 습식 에칭액의 0.5∼10 중량%인 것을 특징으로 하는 에칭 방법.
- 삭제
- 제 2 항에 있어서,상기 양이온을 생성하는 물질의 농도는 습식 에칭액의 0.1∼20 중량%인 것을 특징으로 하는 에칭 방법.
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KR20040029289A (ko) * | 2003-11-14 | 2004-04-06 | 동우 화인켐 주식회사 | 알루미늄 또는 알루미늄 합금층을 함유한 다층막 및단일막 식각액 조성물 |
KR101131832B1 (ko) * | 2004-10-15 | 2012-07-17 | 동우 화인켐 주식회사 | 알루미늄 또는 알루미늄 합금, 및/또는 몰리브덴 또는몰리브덴 합금으로 이루어진 단일막 및 다층막 식각액조성물 |
KR101171175B1 (ko) * | 2004-11-03 | 2012-08-06 | 삼성전자주식회사 | 도전체용 식각액 및 이를 이용한 박막 트랜지스터표시판의 제조 방법 |
US7547627B2 (en) | 2004-11-29 | 2009-06-16 | Semiconductor Energy Laboratory Co., Ltd. | Method for manufacturing semiconductor device |
JP4741343B2 (ja) * | 2004-11-29 | 2011-08-03 | 株式会社半導体エネルギー研究所 | 半導体装置の作製方法 |
KR101216651B1 (ko) * | 2005-05-30 | 2012-12-28 | 주식회사 동진쎄미켐 | 에칭 조성물 |
CN100376721C (zh) * | 2005-09-21 | 2008-03-26 | 中国海洋大学 | 用于钼的化学蚀刻溶液 |
JP4855968B2 (ja) * | 2007-02-16 | 2012-01-18 | 株式会社 日立ディスプレイズ | パターン形成方法及びこのパターン形成方法を用いた液晶表示装置の製造方法 |
KR101393599B1 (ko) * | 2007-09-18 | 2014-05-12 | 주식회사 동진쎄미켐 | Tft-lcd용 금속 배선 형성을 위한 식각액 조성물 |
JP2009103732A (ja) | 2007-10-19 | 2009-05-14 | Sony Corp | 表示装置およびその製造方法 |
JP5484853B2 (ja) * | 2008-10-10 | 2014-05-07 | 株式会社半導体エネルギー研究所 | 半導体装置の作製方法 |
CN102471688A (zh) * | 2009-08-13 | 2012-05-23 | 东友Fine-Chem股份有限公司 | 用于形成铜互连的蚀刻组合物 |
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