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US3687744A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for producing injection type light emitting semiconductor devices having an epitaxial layer of nitrogen-doped gallium phosphide

Assignee: Dynamit Nobel AG
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Filing: 1970-06-26
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Granted: 1972-08-29
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Expires: 1990-06-26
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Abstract

Abstract INJECTION TYPE LIGHT EMITTING SEMICONDUCTOR DEVICES ARE PRODUCED BY GROWING AN EPITAXIAL LAYER OF GALLIUM PHOSPHIDE ON A SEMICONDUCTOR SUBSTRATE HAVING A ZINC BLENDE OR DIAMOND TYPE CRYSTALLINE STRUCTURE UTILIZING A VAPOR GROWTH PROCESS, SIMULTANEOUSLY CONTACTING AMMONIUM HALIDE GAS PRODUCED FROM A SOLID AMMONIUM HALIDE, SUCH AS NH4CL, NH4F, NH4BR OR NH4I, WITH THE GROWING LAYER OF GALLIUM PHOSPHIDE TO INTRODUCE NITROGEN INTO THE EPITAXIAL LAYER OF GALLIUM PHOSPHIDE, FORMING A P-N JUNCTION IN THE NITROGEN-DROPD EPITAXIAL LAYER OF GALLIUM PHOSPHIDE BY MEANS OF DIFFUSION, AND PROVIDING ELECTRODES ON THE P AND N REGIONS, RESPECTIVELY, UTILIZING AN ALLOYING AND A VACUUM EVAPORATING PROCESS.

Inventors

  • 👤 Masahiko Ogirima
  • 👤 Hazime Kusumoto
  • 👤 Toshimitu Shinoda

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 19:43
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; Y; Y10; Y10S; Y10S148/00; Y10S148/049; Y10S148/065; Y10S148/071; Y10S148/072; Y10S148/079; Y10S148/107; Y10S148/119; Y10S252/00; Y10S252/95; Y10S252/951

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) 1975-08-29 1976-02-28 1976-08-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-08-29 1980-02-28 1980-08-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-08-29 1984-02-28 1984-08-29 $7700.00 Window Closed / Lapsed

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