US3648364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a printed resistor
Assignee: Hokuriku Electric Industry Co Ltd
•
Filing: 1970-04-30
•
Granted: 1972-03-14
•
Expires: 1990-04-30
Abstract
Abstract A printed resistor comprising an insulating matrix board, copper layers printed on one side of said board by etching and having predetermined patterns, impedance layers screen printed on the other side of said board, and conductors applied in holes formed in said board and extending through said holes for electrically connecting between selected ones of said copper layers and said impedance layers and the process for producing said printed resistor.
Inventors
- 👤 Tsunehiko Endo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:24
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/16; H05K1/167; H01; H01C; H01C1/00; H01C1/14; H01C7/00; H05K1/02; H05K1/09; H05K1/092; H05K1/095; H05K2201/00; H05K2201/03; H05K2201/032; H05K2201/0323; H05K2201/0332; H05K2201/0335; H05K2201/035; H05K2201/09; H05K2201/09209; H05K2201/09372; H05K2201/09436; H05K2201/09818; H05K2201/09881; H05K2203/00; H05K2203/14; H05K2203/1453; H05K3/00; H05K3/02; H05K3/06; H05K3/22; H05K3/28; H05K3/38; H05K3/386; H05K3/40; H05K3/42; H05K3/425; H05K3/427; H05K3/46; H05K3/4644; H05K3/4664; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099; Y10T29/49101; Y10T29/49117; Y10T29/49124; Y10T29/4913
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
31 words
A process as set forth in claim 1, in which said electrical conductors comprise a mixture of resin and conductive powder and are applied on the walls defining said through holes.
Claim 2
Dependent Claim
23 words
A process as set forth in claim 1, in which said electrical conductors comprise solid conductors which are pressed in said through holes.
Claim 3
Dependent Claim
44 words
A process as set forth in claim 1, in which prior to applying said impedance material on said second side of the board-insulating resin coatings are applied on the second board side by printing at areas where said impedance material is to be applied.
Claim 4
Dependent Claim
46 words
A process as set forth in claim 1, in which said process further comprises the step of applying a conductive coating across one expOsed end of each of said electrical conductors applied in said through holes and the mating end of each of said copper layers.
Claim 5
Dependent Claim
48 words
A process as set forth in claim 1, in which said process further comprises the step of applying a conductive coating across one exposed end of each of said electrical conductors applied in said through holes and the adjacent end of each of said layers of impedance material.
Claim 6
Dependent Claim
33 words
A process as set forth in claim 1, in which said process further comprises the step of applying a common insulating resin coating by printing over and on said layers of impedance material.
Claim 7
Dependent Claim
63 words
A process as set forth in claim 1, in which said process further comprises the steps of applying a conductive coating across one exposed end of each of said electrical conductors applied in said through holes and the adjacent one end of each of said copper layers, and applying insulating resin coatings by printing on and in the vicinity of said conductive coatings.
Claim 8
Dependent Claim
67 words
A process as set forth in claim 1, in which said process further comprises the steps of applying a conductive coating across one exposed end of each of said electrical conductors applied in said through holes and the adjacent end of each of said layers of impedance material and applying a common insulating resin coating by printing over said layers of impedance material and said conductive coatings.
Claim 9
Dependent Claim
97 words
A process for producing an electrical resistor employing a circuit board which comprises the steps of preparing conductor layers on one side of the board, forming a through hole in the board in one conductor layer, forming another through hole in the board in another conductor layer, printing impedance material on a second side of the board so as to form a layer of impedance material between said two through holes, and applying electrically conductive means in each of said through holes to interconnect each end portion of said layer of impedance material with a conductor layer.
Claim 10
Dependent Claim
41 words
A process as set forth in claim 10, in which prior to applying said impedance material on said second side of the board-insulating coatings are applied on the second board side at areas where said impedance material is to be applied.
Claim 11
Dependent Claim
42 words
A process as set forth in claim 10, in which said process further comprises the step of applying a conductive coating across one exposed end of each of said electrically conductive means and the mating end of each of said conductor layers.
Claim 12
Dependent Claim
42 words
A process as set forth in claim 10, in which said process further comprises the step of applying a conductive coating across one exposed end of each of said electrically conductive means and the adjacent end of said layer of impedance material
Claim 13
Dependent Claim
55 words
A process as set forth in claim 10, in which said process further comprises the steps of applying a conductive coating across one exposed end of said electrically conductive means and the adjacent end of said layer of impedance material, and applying an insulating coating over said layers of impedance material and electrically conductive means.
Claim 14
Dependent Claim
53 words
A process as set forth in claim 10, in which said process further comprises the steps of applying a conductive coating across one exposed end of said electrically conductive means and the mating end of each of said conductor layers, and applying an insulating coating over said conductor layers and electrically conductive means.
Claim 15
Dependent Claim
55 words
A process as set forth in claim 10, in which said process further comprises applying said electrically conductive means in one step of applying it in said through holes and another step of applying it to join the electrically conductive means in a through hole and the mating end of each of said conductor layers.
Claim 16
Dependent Claim
55 words
A process as set forth in claim 10, in which said process further comprises applying said electrically conductive means in one step of applying it in said through holes and another step of applying it to join the electrically conductive means in a through hole and the adjacent end of said layer of impeDance material.
References Cited (Backward Citations)
US2848359A
Cited
US3061911A
Cited
US3117298A
Cited
US3134085A
Cited
US3277232A
Cited
US3411947A
Cited
US3409856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |