US4389480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive layer transfer material
Assignee: Hoechst AG
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Filing: 1981-01-12
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Granted: 1983-06-21
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Expires: 2001-01-12
Abstract
Abstract This invention relates to an improvement in a light-sensitive layer transfer material comprising a temporary film support and a light-sensitive thermoplastic photoresist layer detachably connected therewith, the improvement being that the underside of the film support has a lower adhesion to the photoresist layer than its upper side. The invention also relates to a process for transferring a light-sensitive photoresist layer from a temporary to a permanent support.
Inventors
- 👤 Werner Franke
- 👤 Markus Seibel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:24
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/16; G03F7/161; G03F7/004; G03F7/09; G03F7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
In a light-sensitive layer transfer material consisting essentially of a temporary film support and a negative-working light-sensitive thermoplastic photopolymerizable photoresist layer detachably connected therewith, the improvement that the adhesion of the upper side of the film support, which carries the light-sensitive layer, is increased with respect to that layer by treatment with an adhesive-promoting agent so that the adhesive difference between the upper side and the underside of the film support is at least 8 g/100 mm, and the adhesion of the upper side does not exceed 70 g/100 mm.
Claim 2
Dependent Claim
90 words
In a light-sensitive layer transfer material consisting essentially of a temporary film support and a negative-working light-sensitive thermoplastic photopolymerizable photoresist layer detachably connected therewith, the improvement that the adhesion of the upper side of the film support, which carries the light-sensitive layer, is increased with respect to that layer by treatment with an adhesive-promoting agent so that the adhesive difference between the upper side and the underside of the film support is at least 8 g/100 mm, and the adhesion of the upper side does not exceed 70 g/100 mm.
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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) | 1986-06-20 | 1986-12-20 | 1987-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-20 | 1990-12-20 | 1991-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-20 | 1994-12-20 | 1995-06-21 | $7700.00 | Window Closed / Lapsed |