US5507978A
Expired / Lapsed
US
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Novolak containing photoresist stripper composition
Assignee: Olin Microelectronic Chemicals Inc
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Filing: 1995-05-08
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Granted: 1996-04-16
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Expires: 2015-05-08
Abstract
Abstract A noncorrosive photoresist composition containing: (a) 20-70% by weight of an organic polar solvent having a dipole moment of more than 3.5; (b) 70-20% by weight of selected amine compounds; (c) about 0.01% to about 1% by weight of novolak resin having a weight-average molecular weight (M w ) from about 200 to about 5,000; (d) optionally 0-10% by weight of selected amino acid having a hydroxyl group; and (e) optionally 0-10% by weight of water.
Inventors
- 👤 Kenji Honda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:01
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/30; G03F7/32; G03F7/42; G03F7/422; G03F7/425
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
278 words
A resist stripper composition comprising: (a) from about 20 to about 70% by weight of an organic polar solvent having a dipole moment of more than 3.5; (b) from about 70 to about 20% by weight of an amine compound selected from the group consisting of compounds having the formula (I): ##STR5## wherein n and m are each independently an integer ranging from 0-5, inclusive; X is hydrogen, alkyl, or alkoxy group; Y is either --O-- or --NH--; and Z is hydrogen, --OH, or --NH 2 ; (c) about 0.01% to about 1% by weight of novolak resin having a weight average molecular weight (M w ) from about 200 to about 5,000; (d) optionally from about 0 to about 10% by weight of an amino acid selected from the group consisting of compounds having the formula (II): ##STR6## wherein n is an integer ranging from 1-3; R 1 and R 2 are each independently selected from the group consisting of hydrogen and compounds having the formula ##STR7## wherein R 5 , R 6 , and R 7 are each independently selected from hydrogen, --OH, --CH 2 OH, alkyl, alkoxy, phenyl, and mono-, di- or tri-hydroxy-substituted phenyl groups; and R 3 and R 4 are each independently selected from the group consisting of hydroxy and compounds having the formula (IV): ##STR8## wherein X', Y', and Z' are each independently selected from hydrogen, --OH, --CH 2 OH, --CH 2 CH 2 OH, --CH 2 COOH, alkyl, or alkoxy group, and at least one of them is --OH, --CH 2 CH 2 OH, or --CH 2 OH; and (e) optionally from about 0 to about 10% by weight of water.
Claim 2
Dependent Claim
278 words
A resist stripper composition comprising: (a) from about 20 to about 70% by weight of an organic polar solvent having a dipole moment of more than 3.5; (b) from about 70 to about 20% by weight of an amine compound selected from the group consisting of compounds having the formula (I): ##STR5## wherein n and m are each independently an integer ranging from 0-5, inclusive; X is hydrogen, alkyl, or alkoxy group; Y is either --O-- or --NH--; and Z is hydrogen, --OH, or --NH 2 ; (c) about 0.01% to about 1% by weight of novolak resin having a weight average molecular weight (M w ) from about 200 to about 5,000; (d) optionally from about 0 to about 10% by weight of an amino acid selected from the group consisting of compounds having the formula (II): ##STR6## wherein n is an integer ranging from 1-3; R 1 and R 2 are each independently selected from the group consisting of hydrogen and compounds having the formula ##STR7## wherein R 5 , R 6 , and R 7 are each independently selected from hydrogen, --OH, --CH 2 OH, alkyl, alkoxy, phenyl, and mono-, di- or tri-hydroxy-substituted phenyl groups; and R 3 and R 4 are each independently selected from the group consisting of hydroxy and compounds having the formula (IV): ##STR8## wherein X', Y', and Z' are each independently selected from hydrogen, --OH, --CH 2 OH, --CH 2 CH 2 OH, --CH 2 COOH, alkyl, or alkoxy group, and at least one of them is --OH, --CH 2 CH 2 OH, or --CH 2 OH; and (e) optionally from about 0 to about 10% by weight of water.
Claim 3
Dependent Claim
14 words
The stripper composition of claim 1 wherein said solvent (a) is a cyclic amide.
Claim 4
Dependent Claim
21 words
The stripper composition of claim 2 wherein said cyclic amide is selected from the group consisting of N-alkyl-2-pyrrolidone, N-hydroxyalkyl-2-pyrrolidone, and 1,3-dialkyl-2-imidazolidinone.
Claim 5
Dependent Claim
13 words
The stripper composition of claim 1 wherein said amine (b) is an alkanolamine.
Claim 6
Dependent Claim
22 words
The stripper composition of claim 4 wherein said alkanolamine is selected from the group consisting of monoethanolamine, 2-(2-aminoethoxy)ethanol, 2-(2-aminoethylamino)ethanol, diethanolamine, and triethanolamine.
Claim 7
Dependent Claim
53 words
The stripper composition of claim 1 wherein said novolak resin is an addition-condensation products of a monomeric phenolic compound selected from the group consisting of phenol, o-cresol, m-cresol, p-cresol, 2,3-xylenol, 2,5-xylenol, 3,5-xylenol, 2,3,5-trimethylphenol, and admixtures thereof with an aldehyde source selected from the group consisting of formaldehyde, paraformaldehyde, benzeldehyde, acetaldehyde, and admixtures thereof.
Claim 8
Dependent Claim
23 words
The stripper composition of claim 6 wherein said novolak resin is present in an amount of 0.03-0.7% by weight in said stripper composition.
Claim 9
Dependent Claim
41 words
The stripper composition of claim 1 wherein said amino acid is selected from the group consisting of: tricine, bicine, DL-homoserine, D-homoserine, L-homoserine, DL-threonine, D-allo-threonine, L-allothreonine, D-threonine, L-threonine, DL-3-hydroxynorvaline, DL-metathroxine, DL-tyrosine, D-tyrosine, L-tyrosine, 3-(3,4-dihydroxyphenyl)-DL-alanine, 3-(3,4-dihydroxyphenyl)-L-amine, 3-(2,4,5-trihydroxyphenyl)-DL-alanine, DL-alpha-methyltyrosine, L-alphamethytyrosine, (-)-3-(3,4-dihydroxyphenyl)-2-methyl-L-alanine DL-threo-3-phenylserine, and DL-threo-3,4-dihydroxyphenylserine.
Claim 10
Dependent Claim
22 words
The stripper composition of claim 8 wherein said amino acid is selected from the group consisting of tricine, bicine, 3-(2,4,5-trihydroxyphenyl)-DL-alanine, and DL-threo-3,4-dihydroxyphenylserine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-04-16 | 1999-10-16 | 2000-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-16 | 2003-10-16 | 2004-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-16 | 2007-10-16 | 2008-04-16 | $7700.00 | Window Closed / Lapsed |