US3564357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer semiconductor device with reduced surface current
Assignee: CKD Praha DIZ AS
•
Filing: 1969-03-26
•
Granted: 1971-02-16
•
Expires: 1989-03-26
Abstract
Abstract IN A MONOCRYSTALLINE SEMICONDUCTOR BODY A LAYER OF ONE CONDUCTIVITY TYPE IS SANDWICHED BETWEEN A PAIR OF ADJACENT LAYERS OF OPPOSITE CONDUCTIVITY TYPE. A FOURTH LAYER OF THE ONE CONDUCTIVITY TYPE HAVING A SMALLER DIAMETER THAN ANY OF THE OTHER LAYERS IS FORMED IN ONE OF THE ADJACENT LAYERS AND DETERMINES THE FUNCTIONAL CROSS SECTION OF THE DEVICE, EACH OF THE OTHER LAYERS EXTENDING BEYOND THE FUNCTIONAL CROSS SECTION IN A PERIPHERAL BORDER AREA.
Inventors
- 👤 Oto Valcik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:52
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/10; H10D64/00; H10D64/20; H10D64/27; H10D99/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |