Patent US3274458A successfully refreshed from Google Patents.
US3274458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extremely high voltage silicon device
Assignee: Infineon Technologies Americas Corp
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Filing: 1964-04-02
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Granted: 1966-09-20
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Expires: 1984-04-02
Abstract
No abstract record available.
Inventors
- 👤 John L Boyer
- 👤 Frank W Parrish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:54
CPC Classifications
H; H10; H10W; H10W42/00; H10W42/60; H10W72/00; H10W76/00; H10W76/40; H10W76/42; H10W76/43
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A HIGH VOLTAGE SEMICONDUCTOR DEVICE COMPRISING A WAFER OF SEMICONDUCTOR MATERIAL HAVING AT LEAST ONE JUNCTION THEREIN, A CONDUCTIVE SUPPORT BASE FOR SAID WAFER AND BEING CONNECTED TO ONE SURFACE PORTION OF SAID WAFER, AN INSULATION CYLINDER HAVING ONE END THEREOF MECHANICALLY CONNECTED TO SAID CONDUCTIVE SUPPORT BASE, AND AN UPPER TERMINAL STRUCTURE ELECTRICALLY CONNECTED TO A SURFACE PORTION OF SAID WAFER OPPOSITE TO SAID ONE SURFACE PORTION AND MECHANICALLY CONNECTED TO THE OPOSITE END OF SAID INSULATION CYLINDER; SAID MECHANICAL CONNECTION BETWEEN SAID ONE END AND SAID OPPOSITE END OF SAID INSULATION CYLINDER TO SAID CONDUCTIVE SUPPORT BASE AND SAID UPPER TERMINAL STRUCTURE DEFINING A HERMETICALLY SEALED HOUSING FOR SAID WAFER; AND A CORONA SHIELD; SAID CORONA SHIELD COMPRISING A CONDUCTIVE RING SURROUNDING THE UPPER PERIPHERY OF SAID WAFER AND BEING CONNECTED TO SAID CONDUCTIVE BASE, SAID CONDUCTIVE RING BEING RADIALLY INTERPOSED BETWEEN SAID UPPER PERIPHERY OF SAID WAFER AND SAID INSULATION CYLINDER.
Claim 2
Dependent Claim
154 words
A HIGH VOLTAGE SEMICONDUCTOR DEVICE COMPRISING A WAFER OF SEMICONDUCTOR MATERIAL HAVING AT LEAST ONE JUNCTION THEREIN, A CONDUCTIVE SUPPORT BASE FOR SAID WAFER AND BEING CONNECTED TO ONE SURFACE PORTION OF SAID WAFER, AN INSULATION CYLINDER HAVING ONE END THEREOF MECHANICALLY CONNECTED TO SAID CONDUCTIVE SUPPORT BASE, AND AN UPPER TERMINAL STRUCTURE ELECTRICALLY CONNECTED TO A SURFACE PORTION OF SAID WAFER OPPOSITE TO SAID ONE SURFACE PORTION AND MECHANICALLY CONNECTED TO THE OPOSITE END OF SAID INSULATION CYLINDER; SAID MECHANICAL CONNECTION BETWEEN SAID ONE END AND SAID OPPOSITE END OF SAID INSULATION CYLINDER TO SAID CONDUCTIVE SUPPORT BASE AND SAID UPPER TERMINAL STRUCTURE DEFINING A HERMETICALLY SEALED HOUSING FOR SAID WAFER; AND A CORONA SHIELD; SAID CORONA SHIELD COMPRISING A CONDUCTIVE RING SURROUNDING THE UPPER PERIPHERY OF SAID WAFER AND BEING CONNECTED TO SAID CONDUCTIVE BASE, SAID CONDUCTIVE RING BEING RADIALLY INTERPOSED BETWEEN SAID UPPER PERIPHERY OF SAID WAFER AND SAID INSULATION CYLINDER.
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |