US3273030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Majority carrier channel device using heterojunctions
Assignee: International Business Machines Corp
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Filing: 1963-12-30
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Granted: 1966-09-13
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Expires: 1983-12-30
Abstract
No abstract record available.
Inventors
- 👤 Balk Pieter
- 👤 Manfred H Pilkuhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:59
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/80; H10D62/82; H10D30/00; H10D30/40; H10D30/47; H10D30/471; H10D30/475; H10D30/4755; H10D64/00; H10D64/60; H10D64/602
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A MAJORITY CARRIER CHANNEL DEVICE COMPRISING: A MONOCRYSTALLINE SEMICONDUCTOR BODY HAVING AT LEAST TWO REGIONS, THE FIRST REGION BEING CONSTITUTED OF A FIRST SEMICONDUCTOR MATERIAL HAVING A FIRST BAND GAP BEING OF PREDETERMINED CONDUCTIVE-TYPE, AND A SECOND REGION OF A SECOND DIFFERENT SEMICONDUCTOR HAVING A BAND GAP GREATER THAN SAID FIRST BAND GAP AND BEING OF OPPOSITE CONDUCTIVITY-TYPE, AN INVERSION LAYER OF OPPOSITE CONDUCTIVITY TYPE BEING CREATED AT THE NARROW SURFACE PORTION OF SAID FIRST REGION ALONG THE INTERFACE BETWEEN SAID FIRST AND SECOND REGIONS TO DEFINE A CONDUCTION CHANNEL, OHMIC CONTACT MEANS CONNECTED AT EITHER END OF SAID CHANNEL, AND AN OHMIC CONTACT MEANS CONNECTED TO SAID SECOND REGION WHICH SERVES AS A GATE ELECTRODE TO MODULATE THE CONDUCTIVITY OF SAID CHANNEL.
Claim 2
Dependent Claim
123 words
A MAJORITY CARRIER CHANNEL DEVICE COMPRISING: A MONOCRYSTALLINE SEMICONDUCTOR BODY HAVING AT LEAST TWO REGIONS, THE FIRST REGION BEING CONSTITUTED OF A FIRST SEMICONDUCTOR MATERIAL HAVING A FIRST BAND GAP BEING OF PREDETERMINED CONDUCTIVE-TYPE, AND A SECOND REGION OF A SECOND DIFFERENT SEMICONDUCTOR HAVING A BAND GAP GREATER THAN SAID FIRST BAND GAP AND BEING OF OPPOSITE CONDUCTIVITY-TYPE, AN INVERSION LAYER OF OPPOSITE CONDUCTIVITY TYPE BEING CREATED AT THE NARROW SURFACE PORTION OF SAID FIRST REGION ALONG THE INTERFACE BETWEEN SAID FIRST AND SECOND REGIONS TO DEFINE A CONDUCTION CHANNEL, OHMIC CONTACT MEANS CONNECTED AT EITHER END OF SAID CHANNEL, AND AN OHMIC CONTACT MEANS CONNECTED TO SAID SECOND REGION WHICH SERVES AS A GATE ELECTRODE TO MODULATE THE CONDUCTIVITY OF SAID CHANNEL.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |