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US3833375A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of repairing an imperfect pattern of metalized portions on a substrate

Assignee: RCA Corp
•
Filing: 1972-03-09
•
Granted: 1974-09-03
•
Expires: 1992-03-09
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Abstract

Abstract The method comprises treating a pattern of metalized portions on a substrate which were deposited using a photomasking technique, to render the metal thereon more etch-resistant, then sensitizing and activating at least a part of the treated area on the substrate including an area containing imperfectly formed metalized portions, for autocatalytic deposition of more of the metal, depositing a coating of the metal over the treated area by autocatalytic deposition, defining the portions to be repaired by photomasking and etching techniques preferably using the same mask used to define the original pattern of metalized portions, and etching away unwanted portions of the last-deposited metal without removing any substantial amount of the first-deposited metal portions.

Inventors

  • 👤 J Moscony
  • 👤 R Kennard

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 11:46
CPC Classifications
G; G03; G03F; G03F1/00; G03F1/68; G03F1/72; H; H05; H05K; H05K3/00; H05K3/10; H05K3/108; H05K3/22; H05K3/225; H05K2201/00; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0347; H05K2203/00; H05K2203/07; H05K2203/0703; H05K2203/072; H05K3/02; H05K3/06; H05K3/061; H05K3/064; H05K3/18; H05K3/181

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 14 words
A method according to claim 1 in which said metal is a nickel-phosphorous alloy.
Claim 2
Dependent Claim 12 words
A method according to claim 1 in which said substrate is glass.
Claim 3
Dependent Claim 31 words
A method according to claim 1 in which said activating treatment is carried out by dipping the entire substrate in said palladium solution with an inert gas atmosphere over the solution.
Claim 4
Dependent Claim 18 words
A method according to claim 1 in which said etchant is either dilute hydrochloric or dilute nitric acid.

References Cited (Backward Citations)

US3498833A Cited
US3649274A Cited
US3672925A Cited
US3753816A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-09-02 1978-03-04 1978-09-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-09-02 1982-03-04 1982-09-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-09-02 1986-03-04 1986-09-03 $7700.00 Window Closed / Lapsed

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