US5049965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thyristor having adjustable breakover voltage and method of manufacture
Assignee: Siemens AG
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Filing: 1988-11-10
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Granted: 1991-09-17
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Expires: 2008-11-10
Abstract
Abstract A thyristor with an npnp layer sequence in which the p-emitter (4) comprises a sub-region (15) in the lateral region of an ignition contact (8) or of a light-sensitive zone (17a), this sub-region (15) being provided with a higher doping concentration that the remaining part of the p-emitter (4). A controllable over voltage ignition of the thyristor occurs at an adjustable, reduced breakover voltage, such breakover voltage being established by selectively irradiating a zone of the thyristor to reduce the breakover voltage point.
Inventors
- 👤 Hans-Joachim Schulze
- 👤 Heinz Mitlehner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:45
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/10; H10D62/13; H10D62/141; H10D62/142; H10D18/00; H10D18/211; H10D62/50; H10D62/53; H10F; H10F30/00; H10F30/20; H10F30/21; H10F30/26; H10F30/263
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
88 words
A thyristor comprising a semiconductor body that comprises an n-emitter (1) contacted by a cathode electrode (5) and having an adjacent p-base and that comprises a p-emitter (4) contacted by an anode electrode (6) and having an adjacent n-base (3) that is in turn separated from said p-base (2) by a p-n junction (14), characterized by a sub-region (15) of said p-emitter that is arranged in the lateral region of an ignition contact (8) and exhibits a higher p-doping concentration than the remaining parts of said p-emitter (4).
Claim 2
Dependent Claim
88 words
A thyristor comprising a semiconductor body that comprises an n-emitter (1) contacted by a cathode electrode (5) and having an adjacent p-base and that comprises a p-emitter (4) contacted by an anode electrode (6) and having an adjacent n-base (3) that is in turn separated from said p-base (2) by a p-n junction (14), characterized by a sub-region (15) of said p-emitter that is arranged in the lateral region of an ignition contact (8) and exhibits a higher p-doping concentration than the remaining parts of said p-emitter (4).
Claim 3
Dependent Claim
26 words
The thyristor according to claim 1, characterized in that a region (16) lies under said ignition contact (8), which region is irradiated with electrons or protons.
Claim 4
Dependent Claim
89 words
A thyristor comprising a semiconductor body that comprises an n-emitter (1) contacted by a cathode electrode (5) and having an adjacent p-base and that comprises a p-emitter (4) contacted by an anode electrode (6) and having an adjacent n-base (3) that is in turn separated from said p-base (2) by a p-n junction (14), characterized by a sub-region (15) of said p-emitter that is arranged in the lateral region of a light-sensitive thyristor zone (17a) and exhibits a higher doping concentration than the remaining parts of said p-emitter (4).
Claim 5
Dependent Claim
89 words
A thyristor comprising a semiconductor body that comprises an n-emitter (1) contacted by a cathode electrode (5) and having an adjacent p-base and that comprises a p-emitter (4) contacted by an anode electrode (6) and having an adjacent n-base (3) that is in turn separated from said p-base (2) by a p-n junction (14), characterized by a sub-region (15) of said p-emitter that is arranged in the lateral region of a light-sensitive thyristor zone (17a) and exhibits a higher doping concentration than the remaining parts of said p-emitter (4).
Claim 6
Dependent Claim
27 words
The thyristor according to claim 1, characterized in that a region (16) lies under said light-sensitive thyristor zone (17a), which region is irradiated with electrons or protons.
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) | 1994-09-16 | 1995-03-18 | 1995-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-16 | 1999-03-18 | 1999-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-16 | 2003-03-18 | 2003-09-17 | $7700.00 | Window Closed / Lapsed |