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US3564353A Expired / Lapsed US ⏱️ 0.0 years remaining

Bulk semiconductor switching device formed from amorphous glass type substance and having symmetrical switching characteristics

Assignee: Westinghouse Electric Corp
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Filing: 1969-04-16
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Granted: 1971-02-16
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Expires: 1989-04-16
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Abstract

Abstract DESCRIBED ARE BULK SEMICONDUCTOR SWITCHING DEVICES HAVING SYMMETRICAL SWITCHING CHARACTERISTICS WITH AN ASSOCIATED CURRENT CONTROLLED NEGATIVE RESISTANCE, AND FORMED FROM AMORPHOUS GLASS-TYPE SUBSTANCES. THE DEVICES OF THE INVENTION CAN BE READILY FABRICATED ON SMALL, INTEGRATED CIRCUITS AND ARE FORMED BY DEPOSITING ON A SEMICONDUCTIVE SUBSTRATE SUCCESSIVE LAYERS WHICH ARE SUBSEQUENTLY HEAT TREATED TO FORM AN AMORPHOUS SEMICONDUCTIVE GLASS, THESE LAYERS COMPRISING SILICON DIOXIDE, LEAD OXIDE AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM-CHROMIUM OXIDE, VANADIUM-VANADIUM OXIDE AND MOLYBDENUM-MOLYBDENUM OXIDE. ALSO DESCRIBED IS A METHOD FOR MANUFACTURING SUCH SEMICONDUCTING GLASSES.

Inventors

  • 👤 William S Corak
  • 👤 David S Herman

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 08:40
CPC Classifications
H; H10; H10P; H10P95/00; H10N; H10N70/00; H10N70/011; H10N70/021; H10N70/20; H10N70/801; H10N70/821; H10N70/826; H10N70/881; H10N70/883; Y; Y10; Y10S; Y10S438/00; Y10S438/90

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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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) 1974-02-15 1974-08-17 1975-02-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-02-15 1978-08-17 1979-02-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-02-15 1982-08-17 1983-02-16 $7700.00 Window Closed / Lapsed

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