US4680248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of desiccant to control edge fusion in dry film photoresist
Assignee: MacDermid Acumen Inc
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Filing: 1985-08-19
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Granted: 1987-07-14
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Expires: 2005-08-19
Abstract
Abstract Disclosed is a method for controlling edge fusion in a laminate of an aqueous developable photoresist composition sandwiched between a film support and a protective cover sheet comprising maintaining the relative humidity below about 20% in the environment surrounding the laminate, preferentially achieved by packaging the photoresist with a desiccant in a moisture proof container.
Inventors
- 👤 Donald J. Roach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:16
CPC Classifications
G; G03; G03C; G03C3/00; Y; Y10; Y10S; Y10S430/00; Y10S430/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
44 words
An element comprising a laminate of an aqueous developable photoresist composition sandwiched between a film support and a protective cover sheet enclosed in a moisture proof container with an amount of dessicant sufficient to maintain the relative humidity below about 20% inside said container.
Claim 2
Dependent Claim
44 words
An element comprising a laminate of an aqueous developable photoresist composition sandwiched between a film support and a protective cover sheet enclosed in a moisture proof container with an amount of dessicant sufficient to maintain the relative humidity below about 20% inside said container.
Claim 3
Dependent Claim
43 words
In a method comprising enclosing in a container a laminate of an aqueous developable photoresist composition sandwiched between supporting layers, the improvement comprising enclosing in the container an amount of desiccant sufficient to maintain the relative humidity inside the container below about 20%.
Claim 4
Dependent Claim
43 words
In a method comprising enclosing in a container a laminate of an aqueous developable photoresist composition sandwiched between supporting layers, the improvement comprising enclosing in the container an amount of desiccant sufficient to maintain the relative humidity inside the container below about 20%.
Claim 5
Dependent Claim
49 words
In an element comprising a laminate of an aqueous developable photoresist composition sandwiched between supporting layers enclosed in a container, the improvement wherein the element further comprises an amount of dessicant enclosed in the container sufficient to maintain the relative humidity inside the container at less than about 20%.
Claim 6
Dependent Claim
49 words
In an element comprising a laminate of an aqueous developable photoresist composition sandwiched between supporting layers enclosed in a container, the improvement wherein the element further comprises an amount of dessicant enclosed in the container sufficient to maintain the relative humidity inside the container at less than about 20%.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |