US3984858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor components
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1973-05-22
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Granted: 1976-10-05
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Expires: 1993-05-22
Abstract
Abstract A semiconductor component having at least three p-n-junctions which may be switched from a blocking state to a conducting state. The base zone, positioned between the second and third p-n-junctions, is characterized in that it comprises three single zones, the center zone of which is more highly doped and appreciably thinner than either of the two outer zones. The doping concentrations in the two outer zones are equal to one another and appreciably lower than that in a control zone, which is positioned between the first and second p-n-junctions. The effect of the foregoing construction is to reduce the recovery time of the semiconductor component without causing an increase in the forward potential drop, or vice-versa.
Inventors
- 👤 Jozef Cornu
- 👤 Alois Marek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:40
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/10; H10D62/17; H10D18/00; H10D99/00; H10P; H10P95/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
157 words
A bistable semiconductor component which may be switched from a blocking state to a conducting state, which comprises a body of semiconductor material including first, second and third sequentially arranged p-n junctions, a base zone between said second and third p-n junctions and a control zone between said first and second p-n junctions, said base zone comprising three zones in a layered configuration, each of said three zones arranged generally parallel to said p-n junctions and extending across the width of said body of semiconductor material, a center zone positioned between two outer zones, said center zone being more highly doped and thinner than either of said two outer zones, and the doping concentrations of said two outer zones being equal to one another and lower than the doping concentration in said control zone, the semiconductor component further comprising thin p and n zones forming a fourth p-n junction located within one of said two outer zones.
Claim 2
Dependent Claim
157 words
A bistable semiconductor component which may be switched from a blocking state to a conducting state, which comprises a body of semiconductor material including first, second and third sequentially arranged p-n junctions, a base zone between said second and third p-n junctions and a control zone between said first and second p-n junctions, said base zone comprising three zones in a layered configuration, each of said three zones arranged generally parallel to said p-n junctions and extending across the width of said body of semiconductor material, a center zone positioned between two outer zones, said center zone being more highly doped and thinner than either of said two outer zones, and the doping concentrations of said two outer zones being equal to one another and lower than the doping concentration in said control zone, the semiconductor component further comprising thin p and n zones forming a fourth p-n junction located within one of said two outer zones.
Claim 3
Dependent Claim
177 words
A bistable semiconductor component which may be switched from a blocking state to a conducting state, which comprises a body of semiconductor material including first, second and third sequentially arranged p-n junctions, a base zone between said second and third p-n junctions and a control zone between said first and second p-n junctions, said base zone comprising three zones in a layered configuration, each of said three zones arranged generally parallel to said p-n junctions and extending across the width of said body of semiconductor material, a center zone positioned between two outer zones, said center zone being more highly doped and thinner than either of said two outer zones, and the doping concentrations of said two outer zones being equal to one another and lower then the doping concentration in said control zone, the semiconductor component further comprising thin p and n zones forming fourth and fifth p-n junctions with the fourth p-n junction located within one of said two outer zones and the fifth p-n junction located within the other of said two outer zones.
Claim 4
Dependent Claim
177 words
A bistable semiconductor component which may be switched from a blocking state to a conducting state, which comprises a body of semiconductor material including first, second and third sequentially arranged p-n junctions, a base zone between said second and third p-n junctions and a control zone between said first and second p-n junctions, said base zone comprising three zones in a layered configuration, each of said three zones arranged generally parallel to said p-n junctions and extending across the width of said body of semiconductor material, a center zone positioned between two outer zones, said center zone being more highly doped and thinner than either of said two outer zones, and the doping concentrations of said two outer zones being equal to one another and lower then the doping concentration in said control zone, the semiconductor component further comprising thin p and n zones forming fourth and fifth p-n junctions with the fourth p-n junction located within one of said two outer zones and the fifth p-n junction located within the other of said two outer zones.
Claim 5
Dependent Claim
36 words
A semiconductor component as defined in claim 1, wherein said fourth p-n junction is comprised of a p-doped zone and an n-doped zone, the combined thicknesses of which are less than that of said center zone.
Claim 6
Dependent Claim
51 words
A semiconductor component as defined in claim 2, wherein said fourth and fifth p-n junctions are each formed of a p-doped zone and an n-doped zone, the pair of zones forming each of said fourth and fifth junctions having a combined thickness which is less than that of said center zone.
References Cited (Backward Citations)
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US3277352A
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US3370209A
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US3398334A
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US3439239A
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US3538401A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-05 | 1980-04-05 | 1980-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-05 | 1984-04-05 | 1984-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-05 | 1988-04-05 | 1988-10-05 | $7700.00 | Window Closed / Lapsed |