Patent US4824762A successfully refreshed from Google Patents.
US4824762A
Expired / Lapsed
US
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Method for rinse treatment of a substrate
Assignee: Tokyo Ohka Kogyo Co Ltd
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Filing: 1987-06-26
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Granted: 1989-04-25
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Expires: 2007-06-26
Abstract
Abstract The improvement of the invention consists in the use of a specific ether compound, e.g., diethyleneglycol monomethyl, monoethyl and monobutyl ethers, dipropyleneglycol monomethyl and monoethyl ethers, triethyleneglycol monomethyl and monoethyl ethers and tripropyleneglycol monomethyl ether, as a rinse solvent for a substrate from which the pattern photoresist layer has been removed with a remover solution in the photolithographic processing of semiconductor devices. The rinse solvent is free from the problems in the toxicity to human body and environment pollution relative to waste disposal as well as the danger of fire. The rinse solvent is versatile to be applicable to both of the negative- and positive-working photoresist compositions. Further advantages are obtained by adding an aliphatic amine compound to the rinse solvent.
Inventors
- 👤 Masakazu Kobayashi
- 👤 Shingo Asaumi
- 👤 Hatsuyuki Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:43
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/42; G03F7/422; G03F7/425
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
79 words
In a rinse treatment of a substrate from which a patterned photoresist layer has been removed with a remover solution, the improvement which comprises: rinsing the substrate with a nonaqueous rinse solvent which is essentially composed of an ether compound represented by the general formula R.sup.1 --O--CHR.sup.2 --CH.sub.2 --0).sub.n H, wherein R 1 is an alkyl group having 1 to 4 carbon atoms, R 2 is a hydrogen atom or a methyl group and n is 2 or 3.
Claim 2
Dependent Claim
79 words
In a rinse treatment of a substrate from which a patterned photoresist layer has been removed with a remover solution, the improvement which comprises: rinsing the substrate with a nonaqueous rinse solvent which is essentially composed of an ether compound represented by the general formula R.sup.1 --O--CHR.sup.2 --CH.sub.2 --0).sub.n H, wherein R 1 is an alkyl group having 1 to 4 carbon atoms, R 2 is a hydrogen atom or a methyl group and n is 2 or 3.
Claim 3
Dependent Claim
42 words
The improvement according to claim 1 wherein the ether compound is selected from the group consisting of diethyleneglycol monomethyl ether, diethyleneglycol monoethyl ether, diethyleneglycol monobutyl ether, dipropyleneglycol monomethyl ether, dipropyleneglycol monoethyl ether, triethyleneglycol monomethyl ether, triethyleneglycol monoethyl ether and tripropyleneglycol monomethyl ether.
Claim 4
Dependent Claim
114 words
In a rinse treatment of a substrate from which a patterned photoresist layer has been removed with a remover solution, the improvement comprising rinsing the substrate with a nonaqueous solution consisting essentially of an ether compound of the general formula R.sup.1 --O--CHR.sup.2 --CH.sub.2 --O).sub.n H wherein R 1 is an alkyl group having 1 to 4 carbon atoms, R 2 is a hydrogen atom or methyl group and n is 2 or 3; and an aliphatic amine compound represented by the general formula NR.sub.3.sup.3, in which each R 3 is, independently from the others, a hydrogen atom, alkyl group of hydroxyalkyl group, at least one of these R 3 groups being a hydroxyalkyl group.
Claim 5
Dependent Claim
114 words
In a rinse treatment of a substrate from which a patterned photoresist layer has been removed with a remover solution, the improvement comprising rinsing the substrate with a nonaqueous solution consisting essentially of an ether compound of the general formula R.sup.1 --O--CHR.sup.2 --CH.sub.2 --O).sub.n H wherein R 1 is an alkyl group having 1 to 4 carbon atoms, R 2 is a hydrogen atom or methyl group and n is 2 or 3; and an aliphatic amine compound represented by the general formula NR.sub.3.sup.3, in which each R 3 is, independently from the others, a hydrogen atom, alkyl group of hydroxyalkyl group, at least one of these R 3 groups being a hydroxyalkyl group.
Claim 6
Dependent Claim
29 words
The improvement according to claim 3 wherein the aliphatic amine compound is selected from the group consisting of monoethanol amine, butyl monoethanol amine, ethyl diethanol amine and triisopropanol amine.
Claim 7
Dependent Claim
36 words
The improvement according to claim 3 wherein the amount of the aliphatic amine compound in the rinse solvent does not exceed 15% by weight when the patterned photoresist layer is formed of a negative-working photoresist composition.
Claim 8
Dependent Claim
36 words
The improvement according to claim 3 wherein the amount of the aliphatic amine compound in the rinse solvent does not exceed 50% by weight when the patterned photoresist layer is formed of a positive-working photoresist composition.
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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) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |