Patent US3770520A successfully refreshed from Google Patents.
US3770520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of semiconductor integrated-circuit devices
Assignee: KYODO DENSHI GIJUTSU KENKYUSHO
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Filing: 1969-06-23
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Granted: 1973-11-06
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Expires: 1989-06-23
Abstract
Abstract A semiconductor integrated-circuit device in which, on a semiconductor substrate of a first conductivity type, a number of semiconductor regions of a conductivity type different from the first conductivity type are disposed and are surrounded around their side surfaces by polycrystalline layers within which is diffused an impurity imparting a conductivity different from that of the semiconductor regions, whereby the difference in diffusion velocities of impurities in single crystals and in polycrystalline structures is utilized
Inventors
- 👤 Y Kabaya
- 👤 H Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:41
CPC Classifications
H; H10; H10P; H10P95/00; H10W; H10W10/00; H10W10/01; H10W10/041; H10W10/40; Y; Y10; Y10S; Y10S148/00; Y10S148/037; Y10S148/085; Y10S148/122; Y10S438/00; Y10S438/969
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
49 words
A method according to claim 1, in which said impurity imparting said first conductivity type to said polycrystal layer is diffused therein at the same time as said diffused regions and the diffusion velocity is greater in said polycrystal layer thereby isolating the single-crystal areas of said single-crystal layer.
References Cited (Backward Citations)
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US3396456A
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US3514676A
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US3617826A
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US3607466A
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |