Patent US3128200A successfully refreshed from Google Patents.
Patent US3290570A successfully refreshed from Google Patents.
US3290570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilevel expanded metallic contacts for semiconductor devices
Assignee: Texas Instruments Inc
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Filing: 1964-04-28
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Granted: 1966-12-06
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Expires: 1984-04-28
Abstract
No abstract record available.
Inventors
- 👤 James A Cunningham
- 👤 Robert P Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:14
CPC Classifications
H; H10; H10P; H10P95/00; H10W; H10W20/00; H10W20/40; H10W20/41; H10W20/425; H10W72/00; H10W72/90; H10W72/01; H10W72/019; H10W72/01931; H10W72/01938; H10W72/01951; H10W72/071; H10W72/075; H10W72/50; H10W72/531; H10W72/536; H10W72/5363; H10W72/551; H10W72/552; H10W72/5522; H10W72/5524; H10W72/59; H10W72/921; H10W72/923; H10W72/951; H10W72/952; H10W90/00; H10W90/701; H10W90/751; H10W90/753; H10W90/754; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12611; Y10T428/12771; Y10T428/12806; Y10T428/12826
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A CONTACT AND LEAD ARRANGEMENT FOR A SEMICONDUCTOR DEVICE OF THE TYPE INCLUDING A SILICON WAFER HAVING A REGION ADJACENT ONE FACE THEREOF WITH A P-N JUNCTION BETWEEN SUCH REGION AND OTHER SILICON OF THE WAFER EXTENDING TO SAID ONE FACE BENEATH A SILICON OXIDE COATING, THE COATING DEFINING A SMALL OPENING OVER SAID REGION, THE CONTACT AND LEAD ARRANGEMENT COMPRISISNG A DEPOSITED LAYER OF MOLYBDENUM ENGAGING THE SURFACE OF SAID REGION IN SAID OPENING IN THE SILICON OXIDE COATING, THE LAYER OF MOLYBDENUM EXTENDING FROM SAID OPENING OUT OVER SAID SILICON OXIDE COATING IN DIRECT CONTACT THEREWITH AND OVER THE EDGE OF SAID JUNCTION TO A POSITION SPACED FROM SAID REGION ON SAID ONE FACE, AND A DEPOSITED LAYER OF GOLD OVERLYING SAID LAYER OF MOLYBDENUM.
Claim 2
Dependent Claim
127 words
A CONTACT AND LEAD ARRANGEMENT FOR A SEMICONDUCTOR DEVICE OF THE TYPE INCLUDING A SILICON WAFER HAVING A REGION ADJACENT ONE FACE THEREOF WITH A P-N JUNCTION BETWEEN SUCH REGION AND OTHER SILICON OF THE WAFER EXTENDING TO SAID ONE FACE BENEATH A SILICON OXIDE COATING, THE COATING DEFINING A SMALL OPENING OVER SAID REGION, THE CONTACT AND LEAD ARRANGEMENT COMPRISISNG A DEPOSITED LAYER OF MOLYBDENUM ENGAGING THE SURFACE OF SAID REGION IN SAID OPENING IN THE SILICON OXIDE COATING, THE LAYER OF MOLYBDENUM EXTENDING FROM SAID OPENING OUT OVER SAID SILICON OXIDE COATING IN DIRECT CONTACT THEREWITH AND OVER THE EDGE OF SAID JUNCTION TO A POSITION SPACED FROM SAID REGION ON SAID ONE FACE, AND A DEPOSITED LAYER OF GOLD OVERLYING SAID LAYER OF MOLYBDENUM.
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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |