US3224069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating semiconductor devices
Assignee: RCA Corp
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Filing: 1965-04-01
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Granted: 1965-12-21
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Expires: 1985-04-01
Abstract
No abstract record available.
Inventors
- 👤 Thorne Derek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:56
CPC Classifications
H; H10; H10W; H10W72/00; H10W72/20; H10D; H10D99/00; H10P; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/051; Y10S148/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
METHOD OF FABRICATING A SEMICONDUCTOR DEVICE COMPRISING THE STEPS OF PREPARING A GIVEN CONDUCTIVITY TYPE SEMICONDUCTIVE WAFER WITH TWO OPPOSING MAJOR FACES, SAID WAFER HAVING A SURFACE ZONE OF SAID GIVEN CONDUCTIVITY TYPE BUT GREATER CONDUCTIVITY THAN THE INTERIOR THEREOF; BONDING A FIRST APERTURED BASE TAB TO ONE OF SAID MAJOR FACES; REMOVING SAID SURFACE ZONE IN THE REGION WITHIN THE APERATURE OF SAID FIRST BASE TAB; ATTACHING A FIRST ELECTRODE TO SAID WAFER WITHIN SAID APERTURE; ATTACHING A SECOND ELECTRODE TO THE OTHER SAID OPPOSING MAJOR
Claim 2
Dependent Claim
87 words
METHOD OF FABRICATING A SEMICONDUCTOR DEVICE COMPRISING THE STEPS OF PREPARING A GIVEN CONDUCTIVITY TYPE SEMICONDUCTIVE WAFER WITH TWO OPPOSING MAJOR FACES, SAID WAFER HAVING A SURFACE ZONE OF SAID GIVEN CONDUCTIVITY TYPE BUT GREATER CONDUCTIVITY THAN THE INTERIOR THEREOF; BONDING A FIRST APERTURED BASE TAB TO ONE OF SAID MAJOR FACES; REMOVING SAID SURFACE ZONE IN THE REGION WITHIN THE APERATURE OF SAID FIRST BASE TAB; ATTACHING A FIRST ELECTRODE TO SAID WAFER WITHIN SAID APERTURE; ATTACHING A SECOND ELECTRODE TO THE OTHER SAID OPPOSING MAJOR
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 |