Patent US3629667A successfully refreshed from Google Patents.
US3629667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor resistor with uniforms current distribution at its contact surface
Assignee: International Business Machines Corp
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Filing: 1969-03-14
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Granted: 1971-12-21
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Expires: 1989-03-14
Abstract
Abstract A diffused resistor for semiconductor integrated circuits which avoids the problems caused by the high surface current density. The resistor includes at least one semiconductor region of conductivity type opposite to the resistor proper located between a pair of ohmic contacts to the resistor region. This semiconductor region diverts the current flow from the surface of the resistor region and causes a more uniform current distribution across the surface of the ohmic contacts.
Inventors
- 👤 Neil D Lubart
- 👤 Madhukar B Vora
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:21
CPC Classifications
H; H10; H10D; H10D1/00; H10D1/40; H10D1/43
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
14 words
A semiconductor resistor structure according to claim 1 wherein said electrical contacts are metallic.
References Cited (Backward Citations)
GB923153A
Cited
US3404321A
Cited
US3335340A
Cited
US3333326A
Cited
US3387193A
Cited
US3510735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |