US4694121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printed circuit board
Assignee: Sony Corp
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Filing: 1986-11-10
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Granted: 1987-09-15
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Expires: 2006-11-10
Abstract
Abstract A printed circuit board having an electrically insulative substrate, an electroconductive layer formed on the electrically insulative substrate, and a resist layer formed on the electroconductive layer which has a row of openings whose distances between adjacent ones increase from one end to the other end of the row.
Inventors
- 👤 Masuaki Ota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:27
CPC Classifications
H; H05; H05K; H05K1/00; B; B23; B23K; B23K1/00; B23K1/08; H05K3/00; H05K3/30; H05K3/32; H05K3/34; H05K3/3452; H05K3/3465; H05K3/3468; G; G01; G01N; G01N13/00; G01N13/02; G01N2013/0225; H05K1/02; H05K1/0266; H05K2201/00; H05K2201/09; H05K2201/09209; H05K2201/09654; H05K2201/09781; H05K2201/09818; H05K2201/099; H05K2203/00; H05K2203/04; H05K2203/046; H05K2203/16; H05K2203/163
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
47 words
A printed circuit board comprising: an electrically insulative substrate; an electroconductive layer formed on said electrically insulative substrate; and a resist layer formed on said electroconductive layer and having a row of openings, distances between adjacent openings increasing from one end to another end of said row.
Claim 2
Dependent Claim
47 words
A printed circuit board comprising: an electrically insulative substrate; an electroconductive layer formed on said electrically insulative substrate; and a resist layer formed on said electroconductive layer and having a row of openings, distances between adjacent openings increasing from one end to another end of said row.
Claim 3
Dependent Claim
17 words
A printed circuit board according to claim 1, in which said distances increase by a predetermined value.
Claim 4
Dependent Claim
28 words
A printed circuit board according to claim 1, in which said openings are ovals of a same size and said distance is between two edges of adjacent ovals.
Claim 5
Dependent Claim
19 words
A printed circuit board according to claim 3 further comprising a center mark about the center of said row.
Claim 6
Dependent Claim
27 words
A printed circuit board according to claim 4, in which said center mark is an opening which is formed adjacent to said row in said resist layer.
Claim 7
Dependent Claim
22 words
A printed circuit board according to claim 5, in which said row is formed on the edge of said printed circuit board.
References Cited (Backward Citations)
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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) | 1990-09-14 | 1991-03-16 | 1991-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-14 | 1995-03-16 | 1995-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-14 | 1999-03-16 | 1999-09-15 | $7700.00 | Window Closed / Lapsed |