US3244555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor devices
Assignee: International Standard Electric Corp
•
Filing: 1962-04-20
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Granted: 1966-04-05
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Expires: 1982-04-20
Abstract
No abstract record available.
Inventors
- 👤 Adam Fritz Gunter
- 👤 Mills Bernard Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:22
CPC Classifications
H; H10; H10P; H10P95/00; H10W; H10W74/00; H10W74/40; H10W74/43; Y; Y10; Y10S; Y10S148/00; Y10S148/043; Y10S148/051; Y10S148/106
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A METHOD OF MAKING A SEMICONDUCTOR DEVICE HAVING TWO REGIONS OF OPPOSITE CONDUCTIVITY TYPE MATERIAL COMPRISING TREATING ONE SURFACE OF A FIRST OF SAID REFIONS OF SEMICONDUCTOR MATERIAL OF ONE CONDUCTIVITY TYPE SUCH THAT A FIRST AREA OF THE SAID ONE SURFACE IS COVERED BY AN OXIDE LAYER AND A SECOND AREA IS NOT COVERED BY AN OXIDE LAYER, ETCHING AWAY A PART OF THE SAID SECOND AREA TO EXPOSE A SECOND OF SAID REGIONS OF OPPOSITE CONDUCTIVITY TYPE AND AN ADJACENT PART OF THE SAID FIRST AREA EXTENDING BELOW SAID OXIDE LAYER SO THAT SAID OXIDE LAYER OVERHANGS A PORTION OF SAID ADJACENT ETCHED AREA, DEPOSITING A FILM OF AN ELECTRICALLY CONDUCTIVE MATERIAL ON SAID FIRST AND SECOND REGIONS IN SUCH MANNER THAT DEPOSITION ON THE PORTION OF SAID ADJACENT ETCHED AREA IS PREVENTED BY THE SAID OVERHANGING OXIDE LAYER TO FORM A PREDETERMIKNED SEPARATION BETWEEN SAIS FIRST REGION AND THE CONDUCTIVE MATERIAL ON SAID SECOND REGION.
Claim 2
Independent Claim
158 words
A METHOD OF MAKING A SEMICONDUCTOR DEVICE HAVING TWO REGIONS OF OPPOSITE CONDUCTIVITY TYPE MATERIAL COMPRISING TREATING ONE SURFACE OF A FIRST OF SAID REFIONS OF SEMICONDUCTOR MATERIAL OF ONE CONDUCTIVITY TYPE SUCH THAT A FIRST AREA OF THE SAID ONE SURFACE IS COVERED BY AN OXIDE LAYER AND A SECOND AREA IS NOT COVERED BY AN OXIDE LAYER, ETCHING AWAY A PART OF THE SAID SECOND AREA TO EXPOSE A SECOND OF SAID REGIONS OF OPPOSITE CONDUCTIVITY TYPE AND AN ADJACENT PART OF THE SAID FIRST AREA EXTENDING BELOW SAID OXIDE LAYER SO THAT SAID OXIDE LAYER OVERHANGS A PORTION OF SAID ADJACENT ETCHED AREA, DEPOSITING A FILM OF AN ELECTRICALLY CONDUCTIVE MATERIAL ON SAID FIRST AND SECOND REGIONS IN SUCH MANNER THAT DEPOSITION ON THE PORTION OF SAID ADJACENT ETCHED AREA IS PREVENTED BY THE SAID OVERHANGING OXIDE LAYER TO FORM A PREDETERMIKNED SEPARATION BETWEEN SAIS FIRST REGION AND THE CONDUCTIVE MATERIAL ON SAID SECOND REGION.
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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 |