US3363151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for forming planar junctions and devices
Assignee: Transitron Electronic Corp
•
Filing: 1964-07-09
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Granted: 1968-01-09
•
Expires: 1984-07-09
Abstract
No abstract record available.
Inventors
- 👤 Chopra Amarjit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:02
CPC Classifications
H; H10; H10P; H10P32/00; H10D; H10D99/00; H10P10/00; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A METHOD OF MAKING SEMICONDUCTOR DEVICES WHICH METHOD INCLUDES THE STEPS OF, DIFFUSING AN IMPURITY OF ONE TYPE CONDUCTIVITY INTO A SEMICONDUCTOR SUBSTRATE OF OPPOSITE TYPE CODUCTIVITY TO FORM A PLURALITY OF INTERNAL ISLANDS INSIDE SAID SUBSTRATE WHICH INTERNAL ISLANDS ARE OF SAID OPPOSITE TYPE CONDUCTIVITY ESTABLISHED BY SAID IMPURITY ALONG A RECTIFYING JUNCTION SURROUNDING THE ENTIRE VOLUME OF AN ENCLOSED ISLAND AND SEPARATING EACH ISLAND FROM THE ENCLOSED REGION, AND REMOVING MATERIAL FROM SAID SUBSTRATE TO FORM AN EXPOSED SURFACE EXPOSING AT LEAST A PORTION OF EACH ISLAND, A PORTION OF EACH RECTIFYING JUNCTION AND A PORTION OF EACH ENCLOSING REGION.
Claim 2
Independent Claim
102 words
A METHOD OF MAKING SEMICONDUCTOR DEVICES WHICH METHOD INCLUDES THE STEPS OF, DIFFUSING AN IMPURITY OF ONE TYPE CONDUCTIVITY INTO A SEMICONDUCTOR SUBSTRATE OF OPPOSITE TYPE CODUCTIVITY TO FORM A PLURALITY OF INTERNAL ISLANDS INSIDE SAID SUBSTRATE WHICH INTERNAL ISLANDS ARE OF SAID OPPOSITE TYPE CONDUCTIVITY ESTABLISHED BY SAID IMPURITY ALONG A RECTIFYING JUNCTION SURROUNDING THE ENTIRE VOLUME OF AN ENCLOSED ISLAND AND SEPARATING EACH ISLAND FROM THE ENCLOSED REGION, AND REMOVING MATERIAL FROM SAID SUBSTRATE TO FORM AN EXPOSED SURFACE EXPOSING AT LEAST A PORTION OF EACH ISLAND, A PORTION OF EACH RECTIFYING JUNCTION AND A PORTION OF EACH ENCLOSING 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) | 1971-01-08 | 1971-07-10 | 1972-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-08 | 1975-07-10 | 1976-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-08 | 1979-07-10 | 1980-01-09 | $7700.00 | Window Closed / Lapsed |