US3181097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single crystal semiconductor resistors
Assignee: Sprague Electric Co
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Filing: 1960-09-19
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Granted: 1965-04-27
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Expires: 1980-09-19
Abstract
No abstract record available.
Inventors
- 👤 Lehovec Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:05
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/001
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
133 words
AN ELECTRICAL RESISTOR CHARACTERIZED BY A SINGLE CRYSTAL BODY OF GERMANIUM, TWO OHMIC ELECTRODES ATTACHED TO SAID BODY, THE ELECTRICAL CONDUCTIVITY OF SAID BODY ARISING FROM IMPURITY ATOMS SELECTED FROM THE GROUP CONSISTING OF PHOSPHOROUS, ANTIMONY AND ARSENIC ESSENTAILLY HOMOGENEOULSY DISTRIBUTED THROUGH SAID BODY IN A CONCENTRATION OF AT LEAST 10**14 CUBIC CENTRIMETER, THE ELECTRICAL RESISTOR OPERABLE AT A TEMPERATURE RANGE INCLUDING ROOM TEMPERATURE WHERE SAID IMPURITIES ARE FULLY IONIZED INTO IONS AND ELECTRONIC CARRIERS, THE IMPURITIES BEING PRESENT IN THE GERMANIUM IN A CONCENTRATION OF GREATER THAN 10**14 PER CUBIC CENTIMETER AND WHERE THE SCATTERING OF THE ELECTRONIC CARRIER BY THE CRYSTAL LATTICE VIBRATIONS AND BY IMPURITIES RESULTS IN AMOBILITY INDEPENDENT OF TEMPERATURE AND GREATER THAN 200 SQUARE CENTIMETERS PER VOLT SECOND WHEREBY AN ELECRICAL RESISTOR OF ZERO TEMPERATURE DEPENDENCE IS ACHIEVED.
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) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |