Patent US3225273A successfully refreshed from Google Patents.
US3225273A
Expired / Lapsed
US
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Semi-conductor devices and methods for their manufacture
Assignee: US Philips Corp
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Filing: 1961-05-05
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Granted: 1965-12-21
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Expires: 1981-05-05
Abstract
No abstract record available.
Inventors
- 👤 Bakker Martinus Antonius Maria
- 👤 Aalbert Van Vulpen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:38
CPC Classifications
H; H10; H10D; H10D64/00; H10D64/01; H10D64/011; H10F; H10F99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A SEMICONDUCTOR DEVICE COMPRISING A BODY OF A SEMICONDUCTIVE CHALCOGENIDE OF A BIVALENT METAL HAVING A PORTION OF N-TYPE CONDUCTIVITY, AND AN OHMIC CONTACT TO SAID N-TYPE PORTION, SAID CONTACT COMPRISING AN ALLOY OF TWO ELEMENTS IN MAJOR AND MINOR AMOUNTS, THE MAJOR ELEMENT BEING SELECTED FROM THE GROUP CONSISTING OF GOLD, SILVER, AND ALLOYS THEREOF, THE MINOR ELEMENT BEING SELECTED FROM THE GROUP CONSISTING OF INDIUM, GALLIUM AND ALUMINUM.
Claim 2
Dependent Claim
70 words
A SEMICONDUCTOR DEVICE COMPRISING A BODY OF A SEMICONDUCTIVE CHALCOGENIDE OF A BIVALENT METAL HAVING A PORTION OF N-TYPE CONDUCTIVITY, AND AN OHMIC CONTACT TO SAID N-TYPE PORTION, SAID CONTACT COMPRISING AN ALLOY OF TWO ELEMENTS IN MAJOR AND MINOR AMOUNTS, THE MAJOR ELEMENT BEING SELECTED FROM THE GROUP CONSISTING OF GOLD, SILVER, AND ALLOYS THEREOF, THE MINOR ELEMENT BEING SELECTED FROM THE GROUP CONSISTING OF INDIUM, GALLIUM AND ALUMINUM.
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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |