US3244949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulator
Assignee: Fairchild Semiconductor Corp
•
Filing: 1962-03-16
•
Granted: 1966-04-05
•
Expires: 1982-03-16
Abstract
No abstract record available.
Inventors
- 👤 David F Hilbiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:32
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/08; G05F3/10; G05F3/16; G05F3/18; H; H10; H10D; H10D84/00; H10D84/60; H10D84/611; H10D84/613; H10D84/617; Y; Y10; Y10S; Y10S323/00; Y10S323/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A SEMICONDUCTOR CIRCUIT FORMED IN A SINGLE MONOCRYSTALLINE WAFER OF SEMICONDUCTING MATERIAL AND COMPRISING A COLLECTOR ZONE OF A PREDETERMINED IMPURITY CONCENTRATION, A BASE ZONE OF A GREATER IMPURITY CONCENTRATION THAN SAID PREDETERMINED CONCENTRATION AND OF OPPOSITE CONDUCTIVITY TYPE OF SAID COLLECTOR ZONE, AN EMITTER ZONE OF HIGHER IMPURITY CONCENTRATION THAN SAID BASE ZONE AND OF OPPOSITE CONDUCTIVITY TYPE TO SAID BASE ZONE, A FURTHER ZONE OF HIGHER IMPURITY CONCENTRATION THAN SAID BASE ZONE AND OF THE SAME CONDUCTIVITY TYPE AS SAID EMITTER, AND SEPARATE OHMIC CONTACTS TO SAID EMITTER AND SAID COLLECTOR ZONE, SAID FURTHER ZONE EXTENDING INTO BOTH BASE AND COLLECTOR ZONES.
Claim 2
Dependent Claim
104 words
A SEMICONDUCTOR CIRCUIT FORMED IN A SINGLE MONOCRYSTALLINE WAFER OF SEMICONDUCTING MATERIAL AND COMPRISING A COLLECTOR ZONE OF A PREDETERMINED IMPURITY CONCENTRATION, A BASE ZONE OF A GREATER IMPURITY CONCENTRATION THAN SAID PREDETERMINED CONCENTRATION AND OF OPPOSITE CONDUCTIVITY TYPE OF SAID COLLECTOR ZONE, AN EMITTER ZONE OF HIGHER IMPURITY CONCENTRATION THAN SAID BASE ZONE AND OF OPPOSITE CONDUCTIVITY TYPE TO SAID BASE ZONE, A FURTHER ZONE OF HIGHER IMPURITY CONCENTRATION THAN SAID BASE ZONE AND OF THE SAME CONDUCTIVITY TYPE AS SAID EMITTER, AND SEPARATE OHMIC CONTACTS TO SAID EMITTER AND SAID COLLECTOR ZONE, SAID FURTHER ZONE EXTENDING INTO BOTH BASE AND COLLECTOR ZONES.
References Cited (Backward Citations)
US2666814A
Cited
US2655610A
Cited
US2767358A
Cited
US2953759A
Cited
US2847583A
Cited
US2846592A
Cited
US3079512A
Cited
US3176147A
Cited
US2993154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |