US3230428A
Expired / Lapsed
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Field-effect transistor configuration
Assignee: Texas Instruments Inc
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Filing: 1960-05-02
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Granted: 1966-01-18
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Expires: 1980-05-02
Abstract
No abstract record available.
Inventors
- 👤 Arthur D Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:36
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/30; H10D48/32; H10D48/36; H10D30/00; H10D30/80; H10D84/00; H10D84/80; H10D84/86; H10D99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A FIELD-EFFECT TRANSISTOR CONFIGURATION COMPRISING A SEMICONDUCTOR WAFER OF ONE TYPE CONDUCTIVITY HAVING A FIRST DIFFUSED LAYER OF OPPOSITE TYPE CONDUCTIVITY DEFINED IN ONE FACE THEREOF AND A SECOND DIFFUSED LAYER OF SAID ONE TYPE CONDUCTIVITY DEFINED IN THE FACE OF SAID FIRST DIFFUSED LAYER, SAID SECOND DIFFUSED LAYER COMPRISING A RELATIVE NARROW PORTION OF ESTABLISH A THIN SHORT CHANNEL IN SAID FIRST DIFFUSED LAYER AND AN ENLARGED TERMINAL PORTION, A PAIR OF CONTACTS ATTACHED TO SAID FIRST DIFFUSED LAYER ON OPPOSITE SIDES OF THE NARROW PORTION OF SAID SECOND DIFFUSED LAYER, AND A CONTACT ATTACHED SOLELY TO SAID ENLARGED PORTION OF SAID SECOND DIFFUSED LAYER.
Claim 2
Dependent Claim
106 words
A FIELD-EFFECT TRANSISTOR CONFIGURATION COMPRISING A SEMICONDUCTOR WAFER OF ONE TYPE CONDUCTIVITY HAVING A FIRST DIFFUSED LAYER OF OPPOSITE TYPE CONDUCTIVITY DEFINED IN ONE FACE THEREOF AND A SECOND DIFFUSED LAYER OF SAID ONE TYPE CONDUCTIVITY DEFINED IN THE FACE OF SAID FIRST DIFFUSED LAYER, SAID SECOND DIFFUSED LAYER COMPRISING A RELATIVE NARROW PORTION OF ESTABLISH A THIN SHORT CHANNEL IN SAID FIRST DIFFUSED LAYER AND AN ENLARGED TERMINAL PORTION, A PAIR OF CONTACTS ATTACHED TO SAID FIRST DIFFUSED LAYER ON OPPOSITE SIDES OF THE NARROW PORTION OF SAID SECOND DIFFUSED LAYER, AND A CONTACT ATTACHED SOLELY TO SAID ENLARGED PORTION OF SAID SECOND DIFFUSED LAYER.
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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |