KR100639299B1 - 평판디스플레이의 박막트랜지스터 형성을 위한 금속 전극용식각액 조성물 - Google Patents
평판디스플레이의 박막트랜지스터 형성을 위한 금속 전극용식각액 조성물 Download PDFInfo
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- KR100639299B1 KR100639299B1 KR1020050016089A KR20050016089A KR100639299B1 KR 100639299 B1 KR100639299 B1 KR 100639299B1 KR 1020050016089 A KR1020050016089 A KR 1020050016089A KR 20050016089 A KR20050016089 A KR 20050016089A KR 100639299 B1 KR100639299 B1 KR 100639299B1
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- 239000000203 mixture Substances 0.000 title claims abstract description 69
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 51
- 239000002184 metal Substances 0.000 title claims abstract description 51
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 87
- 238000005530 etching Methods 0.000 claims abstract description 79
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000010408 film Substances 0.000 claims abstract description 47
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000000654 additive Substances 0.000 claims abstract description 32
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 32
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000010409 thin film Substances 0.000 claims abstract description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- 229910052750 molybdenum Inorganic materials 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- 239000011733 molybdenum Substances 0.000 claims description 4
- 229910052718 tin Inorganic materials 0.000 claims description 4
- 239000011135 tin Substances 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- 239000010937 tungsten Substances 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 28
- 230000000996 additive effect Effects 0.000 abstract description 27
- 239000002356 single layer Substances 0.000 abstract description 4
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 2
- 238000009736 wetting Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 15
- 238000011156 evaluation Methods 0.000 description 14
- 239000000758 substrate Substances 0.000 description 9
- 150000003863 ammonium salts Chemical class 0.000 description 8
- 239000011521 glass Substances 0.000 description 8
- 229920002120 photoresistant polymer Polymers 0.000 description 8
- 229910000838 Al alloy Inorganic materials 0.000 description 6
- 229910017855 NH 4 F Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 238000001039 wet etching Methods 0.000 description 4
- 239000004094 surface-active agent Substances 0.000 description 3
- -1 ammonium ions Chemical class 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000007884 disintegrant Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K13/00—Etching, surface-brightening or pickling compositions
- C09K13/04—Etching, surface-brightening or pickling compositions containing an inorganic acid
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K13/00—Etching, surface-brightening or pickling compositions
- C09K13/04—Etching, surface-brightening or pickling compositions containing an inorganic acid
- C09K13/06—Etching, surface-brightening or pickling compositions containing an inorganic acid with organic material
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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
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- C23F1/20—Acidic compositions for etching aluminium or alloys thereof
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- 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
- C23F1/30—Acidic compositions for etching other metallic material
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- 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
- H01L21/30604—Chemical etching
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- 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
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31105—Etching inorganic layers
- H01L21/31111—Etching inorganic layers by chemical means
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- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
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- Condensed Matter Physics & Semiconductors (AREA)
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- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- ing And Chemical Polishing (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
Abstract
Description
실시예 번호 | 금속막 종류 | 식각 조성물 조성(중량%) (인산/질산/아세트산/CH3COONH4/물) | 평가 | 잔사여부 |
1 | Mo | 60/5/10/3/22 | ○ | 없음 |
2 | 70/3/10/1/16 | ◎ | 없음 | |
3 | 68/4/11/0.1/16.9 | ○ | 없음 | |
4 | Mo/Al-Nd | 63/8/10/1/18 | ◎ | 없음 |
5 | 64/7/10/2/17 | ○ | 없음 | |
6 | 66/7/10/1/16 | ◎ | 없음 | |
7 | Mo/Al/Mo | 65/5/8/2/20 | ○ | 없음 |
8 | 65/5/9/0.1/20.9 | ◎ | 없음 | |
9 | 70/3/9/1/17 | ◎ | 없음 |
실시예 번호 | 금속막 종류 | 식각 조성물 조성(중량%) (인산/질산/아세트산/NH4NO3/물) | 평가 | 잔사여부 |
10 | Mo | 60/5/10/3/22 | ○ | 없음 |
11 | 70/3/10/1/16 | ◎ | 없음 | |
12 | 68/4/11/0.1/16.9 | ○ | 없음 | |
13 | Mo/Al-Nd | 63/8/10/1/18 | ◎ | 없음 |
14 | 64/7/10/2/17 | ○ | 없음 | |
15 | 66/7/10/1/16 | ◎ | 없음 | |
16 | Mo/Al/Mo | 65/5/8/2/20 | ○ | 없음 |
17 | 65/5/9/0.1/20.9 | ◎ | 없음 | |
18 | 70/3/9/1/17 | ◎ | 없음 |
실시예 번호 | 금속막 종류 | 식각 조성물 조성(중량%) (인산/질산/아세트산/(NH4)2SO4/물) | 평가 | 잔사여부 |
19 | Mo | 60/5/10/3/22 | ○ | 없음 |
20 | 70/3/10/1/16 | ◎ | 없음 | |
21 | 68/4/11/0.1/16.9 | ○ | 없음 | |
22 | Mo/Al-Nd | 63/8/10/1/18 | ◎ | 없음 |
23 | 64/7/10/2/17 | ○ | 없음 | |
24 | 66/7/10/1/16 | ◎ | 없음 | |
25 | Mo/Al/Mo | 65/5/8/2/20 | ○ | 없음 |
26 | 65/5/9/0.1/20.9 | ◎ | 없음 | |
27 | 70/3/9/1/17 | ◎ | 없음 |
실시예 번호 | 금속막 종류 | 식각 조성물 조성(중량%) (인산/질산/아세트산/NH4HSO4/물) | 평가 | 잔사여부 |
28 | Mo | 60/5/10/3/22 | ○ | 없음 |
29 | 70/3/10/1/16 | ◎ | 없음 | |
30 | 68/4/11/0.1/16.9 | ○ | 없음 | |
31 | Mo/Al-Nd | 63/8/10/1/18 | ◎ | 없음 |
32 | 64/7/10/2/17 | ○ | 없음 | |
33 | 66/7/10/1/16 | ◎ | 없음 | |
34 | Mo/Al/Mo | 65/5/8/2/20 | ○ | 없음 |
35 | 65/5/9/0.1/20.9 | ◎ | 없음 | |
36 | 70/3/9/1/17 | ◎ | 없음 |
실시예 번호 | 금속막 종류 | 식각 조성물 조성(중량%) (인산/질산/아세트산/NH4H2PO4/물) | 평가 | 잔사여부 |
37 | Mo | 60/5/10/3/22 | ○ | 없음 |
38 | 70/3/10/1/16 | ◎ | 없음 | |
39 | 68/4/11/0.1/16.9 | ○ | 없음 | |
40 | Mo/Al-Nd | 63/8/10/1/18 | ◎ | 없음 |
41 | 64/7/10/2/17 | ○ | 없음 | |
42 | 66/7/10/1/16 | ◎ | 없음 | |
43 | Mo/Al/Mo | 65/5/8/2/20 | ○ | 없음 |
44 | 65/5/9/0.1/20.9 | ◎ | 없음 | |
45 | 70/3/9/1/17 | ◎ | 없음 |
실시예 번호 | 금속막 종류 | 식각 조성물 조성(중량%) (인산/질산/아세트산/(NH4)2HPO4/물) | 평가 | 잔사여부 |
46 | Mo | 60/5/10/3/22 | ○ | 없음 |
47 | 70/3/10/1/16 | ◎ | 없음 | |
48 | 68/4/11/0.1/16.9 | ○ | 없음 | |
49 | Mo/Al-Nd | 63/8/10/1/18 | ◎ | 없음 |
50 | 64/7/10/2/17 | ○ | 없음 | |
51 | 66/7/10/1/16 | ◎ | 없음 | |
52 | Mo/Al/Mo | 65/5/8/2/20 | ○ | 없음 |
53 | 65/5/9/0.1/20.9 | ◎ | 없음 | |
54 | 70/3/9/1/17 | ◎ | 없음 |
실시예 번호 | 금속막 종류 | 식각 조성물 조성(중량%) (인산/질산/아세트산/NH4NO3/CH3COONH4/물) | 평가 | 잔사여부 |
55 | Mo | 60/5/10/1/1/21 | ○ | 없음 |
56 | 70/3/5/1/3/18 | ◎ | 없음 | |
57 | 68/4/11//0.5/0.1/16.4 | ○ | 없음 | |
58 | Mo/Al-Nd | 63/8/10/1/1/17 | ◎ | 없음 |
59 | 64/7/10/0.5/2/16.5 | ○ | 없음 | |
60 | 67/5/10/1/1/10 | ◎ | 없음 | |
61 | Mo/Al/Mo | 65/5/8/2/1/19 | ◎ | 없음 |
62 | 68/5/9/0.1/17.9 | ○ | 없음 | |
63 | 70/3/9/1/0.5/16.5 | ◎ | 없음 |
실시예 번호 | 금속막 종류 | 식각 조성물 조성(중량%) (인산/질산/아세트산/ CH3COONH4/(NH4)2SO4/물) | 평가 | 잔사여부 |
64 | Mo | 60/5/10/1/1/21 | ○ | 없음 |
65 | 70/3/5/1/3/18 | ◎ | 없음 | |
66 | 68/4/11//0.5/0.1/16.4 | ○ | 없음 | |
67 | Mo/Al-Nd | 63/8/10/1/1/17 | ◎ | 없음 |
68 | 64/7/10/0.5/2/16.5 | ○ | 없음 | |
69 | 67/5/10/1/1/10 | ◎ | 없음 | |
70 | Mo/Al/Mo | 65/5/8/2/1/19 | ◎ | 없음 |
71 | 68/5/9/0.1/17.9 | ○ | 없음 | |
72 | 70/3/9/1/0.5/16.5 | ◎ | 없음 |
실시예 번호 | 금속막 종류 | 식각 조성물 조성(중량%) (인산/질산/아세트산/ NH4NO3/H2SO4/물) | 평가 | 잔사여부 |
73 | Mo | 60/5/10/1/1/21 | ○ | 없음 |
74 | 70/3/5/1/3/18 | ◎ | 없음 | |
75 | 68/4/11//0.5/0.1/16.4 | ○ | 없음 | |
76 | Mo/Al-Nd | 63/8/10/1/1/17 | ◎ | 없음 |
77 | 64/7/10/0.5/2/16.5 | ○ | 없음 | |
78 | 67/5/10/1/1/10 | ◎ | 없음 | |
79 | Mo/Al/Mo | 65/5/8/2/1/19 | ◎ | 없음 |
80 | 68/5/9/0.1/17.9 | ○ | 없음 | |
81 | 70/3/9/1/0.5/16.5 | ◎ | 없음 |
실시예 번호 | 금속막 종류 | 식각 조성물 조성(중량%) (인산/질산/아세트산/ CH3COONH4/H2SO4/물) | 평가 | 잔사여부 |
82 | Mo | 60/5/10/1/1/21 | ○ | 없음 |
83 | 70/3/5/1/3/18 | ◎ | 없음 | |
84 | 68/4/11//0.5/0.1/16.4 | ○ | 없음 | |
85 | Mo/Al-Nd | 63/8/10/1/1/17 | ◎ | 없음 |
86 | 64/7/10/0.5/2/16.5 | ○ | 없음 | |
87 | 67/5/10/1/1/10 | ◎ | 없음 | |
88 | Mo/Al/Mo | 65/5/8/2/1/19 | ◎ | 없음 |
89 | 68/5/9/0.1/17.9 | ○ | 없음 | |
90 | 70/3/9/1/0.5/16.5 | ◎ | 없음 |
실시예 번호 | 금속막 종류 | 식각 조성물 조성(중량%) (인산/질산/아세트산/ (NH4)2SO4/H2SO4/물) | 평가 | 잔사여부 |
91 | Mo | 60/5/10/1/1/21 | ○ | 없음 |
92 | 70/3/5/1/3/18 | ◎ | 없음 | |
93 | 68/4/11//0.5/0.1/16.4 | ○ | 없음 | |
94 | Mo/Al-Nd | 63/8/10/1/1/17 | ◎ | 없음 |
95 | 64/7/10/0.5/2/16.5 | ○ | 없음 | |
96 | 67/5/10/1/1/10 | ◎ | 없음 | |
97 | Mo/Al/Mo | 65/5/8/2/1/19 | ◎ | 없음 |
98 | 68/5/9/0.1/17.9 | ○ | 없음 | |
99 | 70/3/9/1/0.5/16.5 | ◎ | 없음 |
비교예 번호 | 금속막 종류 | 식각 조성물 조성(중량%) (인산/질산/초산/첨가제/물) | Glass attack | 평가 | 잔사여부 |
1 | Mo/Al-Nd | 67 / 5 / 10 / 0 / 18 | X | O | 없음 |
2 | Mo/Al-Nd | 67 / 5 / 10 / (NH4F) 1 / 17 | O | X | 없음 |
3 | Mo/Al-Nd | 67 / 5 / 10 / (NH4F) 5 / 13 | O | X | 없음 |
실시예/비교예 번호 | 금속막 종류 | 식각 조성물 조성(중량%) (인산/질산/초산/첨가제/물) | 유리 공격 | 평가 | 잔사여부 |
실시예 100 | Mo/Al-Nd | 65 / 9 / 5 / (NH4OOCCH3) 2 / 19 | X | O | 없음 |
비교예 4 | Mo/Al-Nd | 65 / 9 / 5 / (NH4OH) 2 / 19 | X | X | 없음 |
Claims (4)
- 인산 60 ~ 70 중량%, 질산 2 ~ 9 중량%, 아세트산 5 ~ 15 중량%, 첨가제 0.1 이상 ~ 1 미만 중량% 및 잔량의 물을 포함하는 식각액 조성물로서, 상기 첨가제는 NH4NO3, CH3COONH4, (NH4)2SO4, NH4HSO4, NH4H2PO4, (NH4)2HPO4로 이루어지는 군에서 선택되는 1 종 이상을 포함하는 것을 특징으로 하는 금속 단일막 또는 다층막의 식각액 조성물.
- 제1항에 있어서, 황산 0.5 ~ 3중량%를 더 포함하는 것을 특징으로 하는 금속 단일막 또는 다층막의 식각액 조성물.
- 제1항에 있어서, 상기 금속은 알루미늄, 몰리브덴, 크롬, 텅스텐, 주석과 이들의 합금으로부터 선택되는 것을 특징으로 하는 금속 단일막 또는 다층막의 식각액 조성물.
- 제1항 내지 제3항 중 어느 하나의 항에 있어서, 상기 금속 단일막 또는 다층막은 평판디스플레이의 박막트랜지스터(TFT)를 구성하는 게이트 전극 또는 데이터 전극을 구성하는 것을 특징으로 하는 금속 단일막 또는 다층막의 식각액 조성물.
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