US3619285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a patterned metal film article
Assignee: RCA Corp
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Filing: 1969-12-10
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Granted: 1971-11-09
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Expires: 1989-12-10
Abstract
Abstract A method of making a patterned metal film article comprising depositing an organic resist material on the surface of a relatively nonporous insulating substrate in the pattern desired for the metal, leaving portions of the substrate surface exposed, treating both the exposed substrate surface portions and the resist surface with a sensitizer and with an activator for electroless deposition of a metal on both these surfaces, treating both said surfaces with an etching solution so that only the exposed substrate surface portions become deactivated, and treating both the surfaces with an electroless metal plating solution such that metal deposits only on the resist surface.
Inventors
- 👤 Nathan Feldstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:36
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/20; H05K3/18; H05K3/181; H05K3/182
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
13 words
A method according to claim 1 in which said resist is a photoresist.
Claim 2
Dependent Claim
15 words
A method according to claim 2 in which said photoresist is a dichromate-sensitized fish glue.
Claim 3
Dependent Claim
15 words
A method according to claim 2 in which said photoresist is a dichromate-sensitized polyvinyl alcohol.
Claim 4
Dependent Claim
14 words
A method according to claim 1 in which said substrate is a vitreous substrate.
Claim 5
Dependent Claim
12 words
A method according to claim 5 in which said substrate is glass.
Claim 6
Dependent Claim
15 words
A method according to claim 1 in which said metal being deposited electrolessly is nickel.
Claim 7
Dependent Claim
12 words
A method according to claim 1 in which said activator is palladium.
Claim 8
Dependent Claim
13 words
A method according to claim 1 in which said etchant is ferric chloride.
Claim 9
Dependent Claim
20 words
A method according to claim 1 in which the article being made is a photomask and said substrate is glass.
Claim 10
Independent Claim
133 words
A method of making a metal article composed of a pattern of connected film portions, comprising: depositing an organic resist material in the form of said pattern on an insulating substrate which is not as porous as said resist, leaving portions of said substrate exposed, sensitizing and activating for the electroless deposition of a metal, both the exposed portions of said substrate and the surface of said resist, treating the sensitized and activated surfaces with an etching solution such that only the exposed portions of said substrate are deactivated, treating both the activated and deactivated surfaces with an electroless metal plating solution such that metal deposits only on said activated surfaces of said resist pattern, reinforcing said metal deposit with additional metal by electrodeposition, and separating the metal deposit from the resist pattern.
Claim 11
Dependent Claim
13 words
A method according to claim 10 in which said pattern is a mesh.
Claim 12
Dependent Claim
21 words
A method according to claim 10 in which said metal deposited electrolessly is nickel and said reinforcing metal is electroplated copper.
Claim 13
Independent Claim
157 words
A method of making a flush type circuit in which a pattern of conductors is embedded in a dielectric material, comprising: depositing an organic resist material in the form of the desired metal pattern on an insulating substrate whicH is not as porous as said resist, leaving portions of the substrate exposed, sensitizing and activating for the electroless deposition of a metal, both the exposed portions of said substrate and the surface of said resist, treating the sensitized and activated surfaces with an etching solution such that only the exposed portions of said substrate are deactivated, treating both the activated and deactivated surfaces with an electroless metal plating solution such that metal deposits only on said activated surfaces of said resist pattern, covering the deposited metal pattern with a layer of a curable synthetic resin in its uncured state, curing said resin, and separating the cured resin layer, with metal pattern embedded therein, from the original substrate.
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |