Patent US3108209A successfully refreshed from Google Patents.
US3108209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor device and method of manufacture
Assignee: Motorola Solutions Inc
•
Filing: 1959-05-21
•
Granted: 1963-10-22
•
Expires: 1979-05-21
Abstract
No abstract record available.
Inventors
- 👤 Carl H Knowles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:33
CPC Classifications
H; H10; H10W; H10W44/00; H10W44/20; H10P; H10P95/00; H10W76/00; H10W76/10; H10W76/12; H10W76/13; H10W76/132; H10W72/00; H10W72/50; H10W72/531; H10W72/5363
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A HIGH FREQUENCY TRANSISTOR INCLUDING IN COMBINATION, A MOUNTING HEADER, A PLURALITY OF LEADS SUPPORTED BY SAID HEADER PROVIDING EMITTER, BASE AND COLLECTOR CONNECTORS, A TAB OF MOLYBDENM ELECTRICALLY CONNECTED TO SAID COLLECTOR LEAD, A DIE OF GERMANIUM ON SAID TAB HAVING A DIFFUSED LAYER OF N-TYPE CONDUCTIVITY AND A SUBSTRATE LAYER OF P-TYPE, CONDUCTIVITY WITH AN INTERFACE BETWEEN SAID LAYERS, SAID SUBSTRATE LAYER INCLUDING A COLLECTOR REGION AND HAVING MATERIAL AT A SURFACE THEREOF FUSED TO SAID TAB COOPERATING THEREWITH TO PROVICE A HEAT SINK, SAID FUSED MATERIAL INCLUDING A REGION OF GOLD AND INDIUM ALLOYED WITH SAID COLLECTOR REGION FORMING A MAJORITY CARRIER COLLECTOR CONTACT, SAID DIE HAVING AN ELEC-
Claim 2
Dependent Claim
112 words
A HIGH FREQUENCY TRANSISTOR INCLUDING IN COMBINATION, A MOUNTING HEADER, A PLURALITY OF LEADS SUPPORTED BY SAID HEADER PROVIDING EMITTER, BASE AND COLLECTOR CONNECTORS, A TAB OF MOLYBDENM ELECTRICALLY CONNECTED TO SAID COLLECTOR LEAD, A DIE OF GERMANIUM ON SAID TAB HAVING A DIFFUSED LAYER OF N-TYPE CONDUCTIVITY AND A SUBSTRATE LAYER OF P-TYPE, CONDUCTIVITY WITH AN INTERFACE BETWEEN SAID LAYERS, SAID SUBSTRATE LAYER INCLUDING A COLLECTOR REGION AND HAVING MATERIAL AT A SURFACE THEREOF FUSED TO SAID TAB COOPERATING THEREWITH TO PROVICE A HEAT SINK, SAID FUSED MATERIAL INCLUDING A REGION OF GOLD AND INDIUM ALLOYED WITH SAID COLLECTOR REGION FORMING A MAJORITY CARRIER COLLECTOR CONTACT, SAID DIE HAVING AN ELEC-
References Cited (Backward Citations)
US2836878A
Cited
US2813326A
Cited
US2945286A
Cited
US2905873A
Cited
US2903630A
Cited
US3028663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |