US3893159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple cell high frequency power semiconductor device having bond wires of differing inductance from cell to cell
Assignee: RCA Corp
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Filing: 1974-02-26
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Granted: 1975-07-01
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Expires: 1994-02-26
Abstract
Abstract The device comprises a plurality of side by side transistor cells individually connected by a plurality of lead wires in a side-by-side lead wire array having a central axis. For reducing the effects of variations of mutual inductance among the various lead wires, and for providing a more uniform temperature from cell to cell, the individual lead wires are designed to have a self-inductance the magnitude of which is directly related to the distance of the particular lead wire from the central axis.
Inventors
- 👤 Irving Edwin Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:01
CPC Classifications
H; H10; H10W; H10W44/00; H10W44/20; H10W90/00; H10W44/226; H10W72/00; H10W72/50; H10W72/541; H10W72/5445; H10W72/5449
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
68 words
A semiconductor device including a plurality of transistor cells, each of said cells comprising at least two regions of opposite type conductivity, a plurality of lead wires individually connected to the same corresponding region of different ones of said cells, said wires being disposed in a generally side by side array having a central axis, the self-inductance of said wires being greater with increasing distance from said axis.
Claim 2
Dependent Claim
68 words
A semiconductor device including a plurality of transistor cells, each of said cells comprising at least two regions of opposite type conductivity, a plurality of lead wires individually connected to the same corresponding region of different ones of said cells, said wires being disposed in a generally side by side array having a central axis, the self-inductance of said wires being greater with increasing distance from said axis.
Claim 3
Dependent Claim
18 words
The device of claim 1 in which the length of said wires is greater with said increasing distance.
Claim 4
Dependent Claim
18 words
The device of claim 1 in which the total inductance of said wires decreases with said increasing distance.
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) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |