Patent US3619740A successfully refreshed from Google Patents.
US3619740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated circuit having complementary field effect transistors
Assignee: NEC Corp
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Filing: 1969-10-28
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Granted: 1971-11-09
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Expires: 1989-10-28
Abstract
Abstract An integrated circuit is disclosed in which the drain and source regions of an integrated gate-type field-effect transistor and the gate region of a junction-type field-effect transistor are formed in common within a semiconductor layer of one conductivity type formed on a substrate of the opposite conductivity type.
Inventors
- 👤 Sho Nakanuma
- 👤 Yuichi Haneta
- 👤 Toshio Wada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:30
CPC Classifications
H; H10; H10D; H10D84/00; H10D84/80; H10D84/82; H10D84/01; H10D84/0123; H10D84/0126; H10D84/0158; H10W; H10W15/00; H10W15/01; H10W74/00; H10W74/40; H10W74/43
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
36 words
The device of claim 1, further comprising a buried layer of said second conductivity type formed in the boundary of said epitaxial layer and said semiconductor substrate, and extending beyond the ends of said gate region.
Claim 2
Dependent Claim
22 words
The device of claim 2, further comprising a second buried layer of said first conductivity type formed in said first-mentioned buried layer.
Claim 3
Dependent Claim
28 words
The device of claim 3, further comprising a third buried layer of said first conductivity type also formed in the boundary between said epitaxial layer and said substrate.
Claim 4
Dependent Claim
27 words
The device of claim 4, further comprising an insulated diffused region of said first conductivity type formed in said epitaxial layer and overlapping said third buried 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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |