Patent US5854612A successfully refreshed from Google Patents.
Patent US4278707A successfully refreshed from Google Patents.
US4278707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for coating the edge of a printed circuit board to improve its moisture resistance
Assignee: HP Inc
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Filing: 1980-05-19
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Granted: 1981-07-14
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Expires: 2000-05-19
Abstract
Abstract By sealing the periphery of a printed circuit board, the previously exposed edges of the board are substantially prevented from moisture wicking. This sealing of the periphery can be made concurrently with the plating of through-holes on the board. With this process, current leakage paths due to board moisture wicking within the board is significantly reduced.
Inventors
- 👤 Joseph Biran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:39
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/40; H05K3/403; H05K1/00; H05K1/02; H05K3/0011; H05K3/0055; H05K1/03; H05K1/0313; H05K1/0353; H05K1/0366; H05K2201/00; H05K2201/09; H05K2201/09145; H05K2201/09209; H05K2201/095; H05K2201/09581; H05K2203/00; H05K2203/11; H05K2203/1147; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49155
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
55 words
A method for manufacturing printed circuit boards having fibers therein comprising the steps of: defining conductive traces on a non-conductive board; sizing the non-conductive board to expose raw fibers at the periphery of the board; and then coating the periphery of the board to seal the periphery and to prevent moisture penetration into the board.
Claim 2
Independent Claim
55 words
A method for manufacturing printed circuit boards having fibers therein comprising the steps of: defining conductive traces on a non-conductive board; sizing the non-conductive board to expose raw fibers at the periphery of the board; and then coating the periphery of the board to seal the periphery and to prevent moisture penetration into the board.
Claim 3
Dependent Claim
30 words
The method as in claim 1 wherein the step of coating the periphery of the board comprises the step of plating the periphery of the board with a metal coating.
References Cited (Backward Citations)
CA664915A
Cited
US4012307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |