Patent US1177435A successfully refreshed from Google Patents.
Patent US3767398A successfully refreshed from Google Patents.
US3767398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid photoresist comprising a polyene and a polythiol
Assignee: Individual
•
Filing: 1971-10-26
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Granted: 1973-10-23
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Expires: 1991-10-26
Abstract
Abstract This invention is directed to a solid photoresist composition comprising a polyene, polythiol and photosensitizer admixture which when coated on a substrate to be modified, e.g., ceramic, glass, metal oxide and metal surfaces and exposed imagewise to actinic radiation results in an insoluble cured polythioether photoresist in the exposed segments with the unexposed segments of the composition being removed in suitable solvents to allow etching of the metal thereunder. Optionally, the solid photoresist composition can be covered with a transparent film to insure cleanliness, which film can be removed before or after exposure as desired.
Inventors
- 👤 C Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:02
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/0275; C; C08; C08G; C08G75/00; C08G75/02; C08G75/04; C08G75/045; C08G75/12
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
57 words
a polythiol containing at least two thiol groups per molecule, the total combined functionality of (a) the reactive unsaturated carbon to carbon bonds per molecule in the polyene and (b) the thiol groups per molecule in the polythiol being greater than four, and the weight ratio of the polyene: polythiol being in the range 1:0.1-0.8 respectively and
Claim 2
Dependent Claim
16 words
The process according to claim 1 wherein the composition is applied to the surface by lamination.
Claim 3
Dependent Claim
57 words
a polythiol containing at least two thiol groups per molecule, the total combined functionality of (a) the reactive unsaturated carbon to carbon bonds per molecule in the polyene and (b) the thiol groups per molecule in the polythiol being greater than four and the weight ratio of the polyene: polythiol being in the range 1:0.1-0.8 respectively and
Claim 4
Dependent Claim
57 words
a polythiol containing at least two thiol groups per molecule, the total combined functionality of (a) the reactive unsaturated carbon to carbon bonds per molecule in the polyene and (b) the thiol groups per molecule in the polythiol being greater than four and the weight ratio of the polyene: polythiol being in the range 1:0.1-0.8 respectively and
Claim 5
Dependent Claim
115 words
0.005 to 50 parts by weight based on 100 parts by weight of said polyene and said polythiol of a photocuring rate accelerator, b. exposing said composition through an image-bearing transparency to UV or high energy ionizing radiation thereby selectively curing the exposed portions of said composition, c. removing said image-bearing transparency, d. removing the uncured portion of the photocurable composition, thereby baring said metal surface beneath the removed uncured portion of the composition, e. plating a metal onto the exposed etchable metal areas of said surface, f. removing the cured portion of said composition from said etchable surface, and g. etching the exposed unplated metal areas of said etchable surface to the desired depth.
Claim 6
Dependent Claim
76 words
0.005 to 50 parts by weight based on 100 parts by weight of said polyene and said Polythiol of a photocuring rate accelerator, b. exposing said composition through an image-bearing transparency to UV or high energy ionizing radiation thereby selectively curing the exposed portions of said composition, c. removing said image-bearing transparency and d. removing the uncured portion of the photocurable composition, thereby baring said etchable solid surface beneath the removed uncured portion of the composition.
Claim 7
Dependent Claim
92 words
0.005 to 50 parts by weight based on 100 parts by weight of said polyene and said polythiol of a photocuring rate accelerator b. exposing said photocurable composition through an image-bearing transparency to UV or high energy ionizing radiation thereby selectively curing the exposed portions of the composition, c. removing said image-bearing transparency, d. removing the unexposed uncured portion of said composition thereby baring the metal clad surface beneath, e. etching away the exposed metal portions of said surface and f. optionally removing the cured portion of said composition from said board.
Claim 8
Dependent Claim
24 words
The process according to claim 1 wherein the composition is applied to the surface as a coating in solution and the solvent is removed.
Claim 9
Dependent Claim
31 words
A process for making a printed circuit board comprising the steps of: a. applying to the surface of a metal clad printed circuit board a solid photocurable composition consisting essentially of
Claim 10
Dependent Claim
16 words
The process according to claim 4 wherein the composition is applied to the surface by lamination.
Claim 11
Dependent Claim
24 words
The process according to claim 4 wherein the composition is applied to the surface as a coating in solution and the solvent is removed.
Claim 12
Dependent Claim
23 words
A process for plating metal comprising: a. applying to an etchable metal surface a solid layer of a photocurable composition consisting essentially of:
Claim 13
Dependent Claim
13 words
A process according to claim 7 wherein Said plating metal is tin-lead alloy.
Claim 14
Dependent Claim
12 words
A process according to claim 7 wherein said plating metal is gold.
Claim 15
Dependent Claim
13 words
A process according to claim 7 whereas said etchable metal surface is perforated.
Claim 16
Dependent Claim
16 words
The process according to claim 7 wherein the composition is applied to the surface by lamination.
Claim 17
Dependent Claim
24 words
The process according to claim 7 wherein the composition is applied to the surface as a coating in solution and the solvent is removed.
References Cited (Backward Citations)
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Cited
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US3556793A
Cited
US3677920A
Cited
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Cited
US3660088A
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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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |