US2843515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductive devices
Assignee: Raytheon Co
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Filing: 1955-08-30
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Granted: 1958-07-15
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Expires: 1975-08-30
Abstract
No abstract record available.
Inventors
- 👤 Statz Hermann
- 👤 Schenkel Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:14
CPC Classifications
H; H10; H10D; H10D99/00; H10D10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A JUNCTION TRANSISTOR COMPRISING A BODY OF SEMICONDUCTIVE MATERIAL SELECTED FROM THE GROUP CONSISTING OF GERMANIUM AND SILICON, SAID BODY HAVING AN EMITTER REGION, A BASE REGION, AND A COLLECTOR REGION, THE RESISTIVITY AND WIDTH OF THE BASE REGION BETWEEN SAID EMITTER AND COLLECTOR REGIONS BEING OF SUCH VALUE THAT A VOLTAGE APPLIED TO SAID COLLECTOR WILL CAUSE AN AVALANCHE BREAKDOWN AT THE COLLECTOR JUNCTION BEFORE SAID VOLTAGE CAUSES A SPACE-CHARGE EXISTING AT SAID COLLECTOR TO EXPAND AND TOUCH SAID EMITTER REGION WHEREBY SAID JUNCTION TRANSISTOR MAY EXHIBIT A CURRENT AMPLIFICATION FACTOR OF AT LEAST UNITY.
Claim 2
Dependent Claim
96 words
A JUNCTION TRANSISTOR COMPRISING A BODY OF SEMICONDUCTIVE MATERIAL SELECTED FROM THE GROUP CONSISTING OF GERMANIUM AND SILICON, SAID BODY HAVING AN EMITTER REGION, A BASE REGION, AND A COLLECTOR REGION, THE RESISTIVITY AND WIDTH OF THE BASE REGION BETWEEN SAID EMITTER AND COLLECTOR REGIONS BEING OF SUCH VALUE THAT A VOLTAGE APPLIED TO SAID COLLECTOR WILL CAUSE AN AVALANCHE BREAKDOWN AT THE COLLECTOR JUNCTION BEFORE SAID VOLTAGE CAUSES A SPACE-CHARGE EXISTING AT SAID COLLECTOR TO EXPAND AND TOUCH SAID EMITTER REGION WHEREBY SAID JUNCTION TRANSISTOR MAY EXHIBIT A CURRENT AMPLIFICATION FACTOR OF AT LEAST UNITY.
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) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |