Patent US3699403A successfully refreshed from Google Patents.
US3699403A
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Fusible semiconductor device including means for reducing the required fusing current
Assignee: RCA Corp
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Filing: 1970-10-23
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Granted: 1972-10-17
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Expires: 1990-10-23
Abstract
Abstract Information storing devices, such as read-only-memories, comprise an array of semiconductor components on a substrate, each component being connected into the array by a fuse. A continuous electrically resistive element is disposed on the substrate, the fuses being disposed on the element. To opencircuit selected ones of the fuses, a current is passed through the element to heat all the fuses to a temperature approaching but less than the melting point of the fuses, and a current is passed through only the selected fuses to further heat them to the fusing temperature thereof.
Inventors
- 👤 Edward Joseph Boleky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:08
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/60; H10W70/611; G; G11; G11C; G11C17/00; G11C17/14; G11C17/16; H10W70/62; H10W70/641; Y; Y10; Y10S; Y10S257/00; Y10S257/926
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
73 words
A semiconductor device comprising: a substrate, an array of components on said substrate, a plurality of fuses associated with various ones of said components, electric resistance heating means on said substrate, said fuses being disposed in heat-transfer relationship with said heating means, and means allowing the passage of a current through said heating means independently of the passage of current through said fuses for reducing the fusing current required to open-circuit said fuses.
Claim 2
Dependent Claim
73 words
A semiconductor device comprising: a substrate, an array of components on said substrate, a plurality of fuses associated with various ones of said components, electric resistance heating means on said substrate, said fuses being disposed in heat-transfer relationship with said heating means, and means allowing the passage of a current through said heating means independently of the passage of current through said fuses for reducing the fusing current required to open-circuit said fuses.
Claim 3
Dependent Claim
16 words
A device as in claim 1 wherein said heating means is electrically isolated from said components.
Claim 4
Dependent Claim
30 words
A device as in claim 1 wherein said heating means is, in comparison with the degree of heat transfer relation thereof with said fuses, substantially thermally isolated from said components.
Claim 5
Dependent Claim
17 words
A device as in claim 1 wherein said fuses are diSposed in contact with said heating means.
Claim 6
Dependent Claim
39 words
A device as in claim 1 wherein said heating means comprises a first layer of electrically resistive material and a second layer of electrically insulating material, said second layer providing electrical isolation of said first layer from said components.
Claim 7
Dependent Claim
17 words
A device as in claim 5 wherein said fuses are disposed in contact with said second layer.
Claim 8
Dependent Claim
32 words
A device as in claim 6 wherein: said first layer is discontinuous and comprises spaced portions, electrically conductive means of low resistance join said spaced portions, and said fuses overlie said portions.
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |