US3388048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabrication of beam lead semiconductor devices
Assignee: AT&T Inc
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Filing: 1965-12-07
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Granted: 1968-06-11
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Expires: 1985-12-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph M Szabo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:47
CPC Classifications
H; H10; H10P; H10P95/00; H10W; H10W20/00; H10W20/40; H10W72/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
IN THE FABRICATION OF A BEAM LEAD SEMICONDUCTOR DEVICE WHICH INCLUDES THE STEPS OF DEPOSITING A FIRST LAYER OF TITANIUM AND A SECOND LAYER OF PLATINUM, THE STEP OF FORMING A MASK ON SAID PLATINUM LAYER CONFORMING TO THE DESIRED CONTACT AND BEAN LEAD PATTERN, THEN TREATING THE MASKED SURFACE WITH AN ETCHANT TO REMOVE THE UNMASKED PLATINUM LAYER, AND ELECTROPLATING A LAYER OF GOLD ONLY ON SAID PLATINUM LAYER.
Claim 2
Dependent Claim
70 words
IN THE FABRICATION OF A BEAM LEAD SEMICONDUCTOR DEVICE WHICH INCLUDES THE STEPS OF DEPOSITING A FIRST LAYER OF TITANIUM AND A SECOND LAYER OF PLATINUM, THE STEP OF FORMING A MASK ON SAID PLATINUM LAYER CONFORMING TO THE DESIRED CONTACT AND BEAN LEAD PATTERN, THEN TREATING THE MASKED SURFACE WITH AN ETCHANT TO REMOVE THE UNMASKED PLATINUM LAYER, AND ELECTROPLATING A LAYER OF GOLD ONLY ON SAID PLATINUM LAYER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |