US3206674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of measuring the electrical properties of a semiconductor crystal, viz. the specific resistance and the life span of the charge carriers of a highohmic crystal
Assignee: Telefunken AG
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Filing: 1960-09-22
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Granted: 1965-09-14
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Expires: 1980-09-22
Abstract
No abstract record available.
Inventors
- 👤 Thuy Joachim
- 👤 Krauss Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:59
CPC Classifications
G; G01; G01N; G01N22/00; G01R; G01R31/00; G01R31/26; G01R31/2607; G01R31/2637; G01R31/265; G01R31/2656
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
THE METHOD OF MEASURING THE ELECTRICAL PROPERTIES OF A SEMICONDUCTOR CRYSTAL, INCLUDING THE STEPS OF: APPLYING SPACED ELECTRODESD TO THE SURFACE OF THE CRYSTAL; INJECTING A RADIO FREQUENCY SIGNAL AT SAID ELECTRODES TO PASS CURRENT THROUGH THE CRYSTAL AT A FREQUENCY AT WHICH THE RESISTIVE AND THE REACTIVE COMPONENTS OF THE IMPEDANCE BETWEEN THE ELECTRODES AND REPRESENTING THE SURFACE BARRIER COMPONENTS BECOMES NEGLIGIBLE AS COMPARED WITH THE COMPONENTS ATTRIBUTABLE TO THE INTERNAL RESISTANCE AND THE LATTICE POLARIZATION CAPACITANCE OF THE CRYSTAL, AND MEASURING SAID IMPEDANCE.
Claim 2
Independent Claim
85 words
THE METHOD OF MEASURING THE ELECTRICAL PROPERTIES OF A SEMICONDUCTOR CRYSTAL, INCLUDING THE STEPS OF: APPLYING SPACED ELECTRODESD TO THE SURFACE OF THE CRYSTAL; INJECTING A RADIO FREQUENCY SIGNAL AT SAID ELECTRODES TO PASS CURRENT THROUGH THE CRYSTAL AT A FREQUENCY AT WHICH THE RESISTIVE AND THE REACTIVE COMPONENTS OF THE IMPEDANCE BETWEEN THE ELECTRODES AND REPRESENTING THE SURFACE BARRIER COMPONENTS BECOMES NEGLIGIBLE AS COMPARED WITH THE COMPONENTS ATTRIBUTABLE TO THE INTERNAL RESISTANCE AND THE LATTICE POLARIZATION CAPACITANCE OF THE CRYSTAL, AND MEASURING SAID IMPEDANCE.
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) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |