Patent US4302737A successfully refreshed from Google Patents.
US4302737A
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RC Network
Assignee: Siemens AG
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Filing: 1979-12-20
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Granted: 1981-11-24
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Expires: 1999-12-20
Abstract
Abstract An RC network is disclosed in which two electrically conducting regions and a dielectric lying between these regions form a capacitor. At least one of the electrically conducting regions consists of resistance material and is designed in the shape of a meandering path. This network can be balanced while still guaranteeing a uniform region distribution of the resistance and the capacitance, by means of a laser beam. Upon a carrier of heat-resistant material, a resistance layer, a dielectric of glow discharge polymer, and an opposite electrode capable of regeneration, are applied. The dielectric completely covers the resistance layer with the exception of contact pads.
Inventors
- 👤 Helmold Kausche
- 👤 Heinz Hebbeker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:08
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/16; H05K1/162; H01; H01C; H01C13/00; H01C13/02; H01C17/00; H01C17/22; H01C17/24; H01C17/242; H10; H10D; H10D86/00; H10D86/80; H10D86/85; H05K1/02; H05K1/03; H05K1/0393; H05K1/167; H05K2201/00; H05K2201/01; H05K2201/0137; H05K2201/0166; H05K2201/0179; H05K2201/03; H05K2201/0302; H05K2201/0317; H05K2201/09; H05K2201/09209; H05K2201/09654; H05K2201/09763; H05K2203/00; H05K2203/17; H05K2203/171; H05K3/00; H05K3/02; H05K3/027; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
130 words
A distributed RC network, comprising: two electrically conducting regions and a dielectric between the conducting regions so as to form a capacitor; at least one of the electrically conducting regions comprising a resistance layer which has a meandering path shape and at least one closed loop connecting to the path; a carrier of heat-resistant material and the resistance layer being formed on the carrier; said dielectric comprising a glow discharge polymer over the resistance layer; the other electrical conducting region comprising an opposite electrode of a metal which can be oxidized in occurring regeneration processes being applied over the dielectric; and the dielectric and the opposite electrode completely covering the resistance layer except for contact areas; whereby an RC network is provided having a capacitance which is capable of regeneration.
Claim 2
Dependent Claim
130 words
A distributed RC network, comprising: two electrically conducting regions and a dielectric between the conducting regions so as to form a capacitor; at least one of the electrically conducting regions comprising a resistance layer which has a meandering path shape and at least one closed loop connecting to the path; a carrier of heat-resistant material and the resistance layer being formed on the carrier; said dielectric comprising a glow discharge polymer over the resistance layer; the other electrical conducting region comprising an opposite electrode of a metal which can be oxidized in occurring regeneration processes being applied over the dielectric; and the dielectric and the opposite electrode completely covering the resistance layer except for contact areas; whereby an RC network is provided having a capacitance which is capable of regeneration.
Claim 3
Dependent Claim
26 words
An RC network according to claim 1 wherein the resistance layer path shape has a portion which is substantially wider than other portions of the path.
Claim 4
Dependent Claim
24 words
An RC network according to claim 1 wherein the carrier comprises polyimide, the resistance layer comprises chrome nickel, and the opposite electrode comprises aluminum.
Claim 5
Dependent Claim
84 words
A distributed RC network designed for trimming by cutting away conducting layers forming the network, comprising: an insulating heat-resistant carrier; a resistance layer on the carrier formed of a winding main resistance path and at least one closed loop secondary path connecting to and adjacent the main path; a dielectric covering substantially covering the resistance layer and an oxidizable opposite electrode conducting layer over substantially all of the dielectric so as to form a regenerable capacitor with the resistance layer and the dielectric therebetween.
Claim 6
Dependent Claim
84 words
A distributed RC network designed for trimming by cutting away conducting layers forming the network, comprising: an insulating heat-resistant carrier; a resistance layer on the carrier formed of a winding main resistance path and at least one closed loop secondary path connecting to and adjacent the main path; a dielectric covering substantially covering the resistance layer and an oxidizable opposite electrode conducting layer over substantially all of the dielectric so as to form a regenerable capacitor with the resistance layer and the dielectric therebetween.
Claim 7
Dependent Claim
23 words
The network of claim 4 wherein the carrier comprises polyimide, the dielectric comprises a gas discharge polymer, and the opposite electrode comprises aluminum.
Claim 8
Dependent Claim
19 words
The network of claim 4 wherein a portion of the main resistance path is substantially wider than other portions.
Claim 9
Independent Claim
112 words
A method for trimming a distributed RC network formed of a heat resistant carrier, a resistance layer on the carrier having a meandering resistance path, a dielectric over the resistance path, and an opposite electrode over the dielectric which forms in conjunction with the dielectric and resistance layer a regenerable capacitor, comprising the steps of: cutting away with a laser a portion of the resistance layer path the dielectric, and the opposite electrode but without substantially changing the carrier, and such that after the portion of the resistance layer is cut away the capacitor regenerates when voltage is applied to eliminate short circuits from between the opposite conducting layer and resistance path.
Claim 10
Independent Claim
112 words
A method for trimming a distributed RC network formed of a heat resistant carrier, a resistance layer on the carrier having a meandering resistance path, a dielectric over the resistance path, and an opposite electrode over the dielectric which forms in conjunction with the dielectric and resistance layer a regenerable capacitor, comprising the steps of: cutting away with a laser a portion of the resistance layer path the dielectric, and the opposite electrode but without substantially changing the carrier, and such that after the portion of the resistance layer is cut away the capacitor regenerates when voltage is applied to eliminate short circuits from between the opposite conducting layer and resistance path.
Claim 11
Dependent Claim
70 words
A method according to claim 7 including the steps of providing the resistance path with a connecting closed loop secondary resistance path extending from and bridging a main portion of the resistance path; cutting through the main path portion to effect a substantial resistance change without substantially changing capacitance; and trimming the secondary closed path in order to effect a change of capacitance without substantially changing resistance of the network.
Claim 12
Dependent Claim
38 words
The method of claim 7 including the step of providing a portion of the resistance path wider than other portions and trimming away portions of the wider resistance layer for a fine resistance adjustment without substantially effecting capacitance.
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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) | 1984-11-23 | 1985-05-25 | 1985-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-23 | 1989-05-25 | 1989-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-23 | 1993-05-25 | 1993-11-24 | $7700.00 | Window Closed / Lapsed |