US4725925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit board
Assignee: Hitachi Ltd
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Filing: 1984-12-24
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Granted: 1988-02-16
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Expires: 2004-12-24
Abstract
Abstract A circuit board including resistors on one surface of a board or substrate having through hole conductors arranged in a lattice like fashion. At least one electrode is formed on a surface of the resistors, at least one electrode being formed by removing a portion of a surface of the board or substrate coaxially with the through hole conductors thereby forming substantially disk-shaped resistors.
Inventors
- 👤 Minoru Tanaka
- 👤 Kazuo Hirota
- 👤 Akira Murata
- 👤 Fumiuki Kobayashi
- 👤 Takaji Takenaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:56
CPC Classifications
H; H01; H01C; H01C13/00; H01C13/02; H01C1/00; H01C1/14; H01C1/142; H05; H05K; H05K1/00; H05K1/16; H05K1/167; H05K1/02; H05K1/11; H05K1/115; H05K1/116; H05K2201/00; H05K2201/03; H05K2201/0302; H05K2201/0317; H05K2201/09; H05K2201/09209; H05K2201/095; H05K2201/09609; H05K2203/00; H05K2203/03; H05K2203/0361; H05K3/00; H05K3/38; H05K3/388; H05K3/40; H05K3/42
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
117 words
A circuit board arrangement comprising at least one circuit board, said circuit board comprising: a substrate having plurality of circular through holes therethrough, resistance means including a resistance layer formed on said substrate, first electrode means including a plurality of circular through-hole conductors respectively formed through said through-holes of said substrate, and a plurality of substantially circular electrode elements formed on said resistance layer and substantially respectively aligned with said through-hole conductors, and second electrode means including a continuous conductive layer formed on said resistance layer and having a plurality of circular holes respectively substantially coaxial with said through-hole conductors, each of said circular holes having a radius greater than a radius of the circular electrode elements.
Claim 2
Dependent Claim
117 words
A circuit board arrangement comprising at least one circuit board, said circuit board comprising: a substrate having plurality of circular through holes therethrough, resistance means including a resistance layer formed on said substrate, first electrode means including a plurality of circular through-hole conductors respectively formed through said through-holes of said substrate, and a plurality of substantially circular electrode elements formed on said resistance layer and substantially respectively aligned with said through-hole conductors, and second electrode means including a continuous conductive layer formed on said resistance layer and having a plurality of circular holes respectively substantially coaxial with said through-hole conductors, each of said circular holes having a radius greater than a radius of the circular electrode elements.
Claim 3
Dependent Claim
96 words
A circuit board comprising at least: (a) a board having a plurality of through hole conductors; (b) resistors formed on one surface of said board so as to be electrically connected to said through hole conductors on said board; and (c) an electrode formed on the surfaces of said resistors, said electrode being removed except for portions located coaxially with said thru-hole conductors and except for a common electrode surrounding said portion so that said resistors are exposed at the removed portions of the electrodes, said portions located coaxially with said through hole constituting individual electrodes.
Claim 4
Dependent Claim
96 words
A circuit board comprising at least: (a) a board having a plurality of through hole conductors; (b) resistors formed on one surface of said board so as to be electrically connected to said through hole conductors on said board; and (c) an electrode formed on the surfaces of said resistors, said electrode being removed except for portions located coaxially with said thru-hole conductors and except for a common electrode surrounding said portion so that said resistors are exposed at the removed portions of the electrodes, said portions located coaxially with said through hole constituting individual electrodes.
Claim 5
Dependent Claim
18 words
A circuit board according to claim 2, wherein individual electronic circuit elements are connected to said individual electrodes.
Claim 6
Dependent Claim
112 words
A circuit board comprising: a multilayer board; a resistance layer formed on said multilayer board; a plurality of substantially circular first electrode elements formed on said resistance layer; a second electrode element including a continuous conductor layer formed on said resistance layer, said conductor layer having a plurality of circular holes formed therein respectively coaxially with said substantially circular first electrode elements, each of said circular holes having a radius larger than a radius of said circular first electrodes; and a wiring layer having a plurality of through hole conductors respectively formed substantially aligned with said first electrode elements, said wiring layer being formed to cover said first and second electrode elements.
Claim 7
Dependent Claim
112 words
A circuit board comprising: a multilayer board; a resistance layer formed on said multilayer board; a plurality of substantially circular first electrode elements formed on said resistance layer; a second electrode element including a continuous conductor layer formed on said resistance layer, said conductor layer having a plurality of circular holes formed therein respectively coaxially with said substantially circular first electrode elements, each of said circular holes having a radius larger than a radius of said circular first electrodes; and a wiring layer having a plurality of through hole conductors respectively formed substantially aligned with said first electrode elements, said wiring layer being formed to cover said first and second electrode elements.
Claim 8
Dependent Claim
20 words
A circuit board according to claim 4, wherein a underlayer is formed between said multilayer board and said resistance layer.
Claim 9
Dependent Claim
25 words
A circuit board according to claim 4, wherein a radius of said first electrode elements is larger than a radius of said through hole conductors.
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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) | 1991-02-15 | 1991-08-17 | 1992-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-15 | 1995-08-17 | 1996-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-15 | 1999-08-17 | 2000-02-16 | $7700.00 | Window Closed / Lapsed |