US3560814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor with strip shaped emitter
Assignee: Telefunken Electronic GmbH
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Filing: 1968-04-08
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Granted: 1971-02-02
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Expires: 1988-04-08
Abstract
Abstract A semiconductor arrangement of the type having a collector zone of a first conductivity type, a base zone of a second conductivity type and an emitter zone of the first conductivity type. Part of the base zone is arranged to extend through an opening in the emitter zone and is short-circuited to the emitter zone.
Inventors
- 👤 Reiner Engbert
- 👤 Reinhold Kaiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:59
CPC Classifications
H; H10; H10W; H10W20/00; H10W20/40; H10D; H10D99/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
43 words
The improvement defined in claim 1 wherein said elongated emitter zone has the shape of a rectangular strip, and said opening within the emitter zone is also of rectangular strip, and said opening within the emitter zone is also of rectangular strip shape.
Claim 2
Dependent Claim
43 words
The improvement defined in claim 2 wherein there are a plurality of said rectangular shaped emitter zones, each with a rectangular shaped opening containing a portion of the base zone therein, said emitter zones being arranged parallel to each other on said surface.
Claim 3
Dependent Claim
39 words
The improvement defined in claim 1 wherein said surrounded portion of said base zone and said emitter zone are short-circuited by a metallic layer covering the outer surface of said portion of said base zone and said emitter zone.
Claim 4
Dependent Claim
178 words
In a transistor having a semiconductor body containing a collector zone of a first conductivity type, a base zone of a second conductivity type extending to a surface thereof, and an emitter zone of said first conductivity type formed within said base zone adjacent said surface, said base zone surrounding said emitter zone at said surface; the improvement wherein said emitter zone includes a plurality of frame shaped portions arranged side by side in strips; wherein portions of said base zone extend to said surface through openings within said portions of said emitter zone; wherein said portions of said base zone are short-circuited to said emitter zone by a metal overlay arranged on said surface over said emitter zone and said portions of said base zone, said metal overlay forming the emitter contact for said transistor, and wherein a separate contact means is provided on said surface for said base zone, a portion of said contact means being positioned on said base zone intermediate said frame shaped emitter portions, said metal overlay and said contact means being interdigitated.
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |