US4087370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoresist stripper systems
Assignee: International Telephone and Telegraph Corp
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Filing: 1976-04-13
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Granted: 1978-05-02
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Expires: 1996-04-13
Abstract
Abstract This relates to a method and solution for removing exposed photopolymer film resist from a substrate. The substrate having the photoresist thereon is contacted with a solution consisting essentially of acid selected from the group consisting of the first three carboxylic acids and their halogenated derivatives, alcohol selected from the group consisting of the simple alcohols containing one to four carbon atoms per molecule and their halogenated derivatives, and water.
Inventors
- 👤 Joseph Don Singalewitch
- 👤 Winifred Reinhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:29
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/22; C11D7/26; C11D7/261; C11D7/50; C11D7/5004; C11D7/5018; C23; C23G; C23G5/00; C23G5/02; G; G03; G03F; G03F7/00; G03F7/26; G03F7/42; G03F7/422; C11D7/265; C11D7/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A method of removing exposed photopolymer film resist from a substrate, comprising: contacting said substrate with a solution consisting essentially of at least 5% by weight monochloroacetic acid; 5 to 47% by weight acid selected from the group consisting of formic, acetic and propionic acids and their halogenated derivatives, 5 to 65% by weight water, and the remainder alcohol selected from the group consisting of methanol, ethanol, propanol and butanol and their halogenated derivatives.
Claim 2
Independent Claim
74 words
A method of removing exposed photopolymer film resist from a substrate, comprising: contacting said substrate with a solution consisting essentially of at least 5% by weight monochloroacetic acid; 5 to 47% by weight acid selected from the group consisting of formic, acetic and propionic acids and their halogenated derivatives, 5 to 65% by weight water, and the remainder alcohol selected from the group consisting of methanol, ethanol, propanol and butanol and their halogenated derivatives.
References Cited (Backward Citations)
US3988256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |