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Semiconductor devices with terminal contacts and method of their production

  • US 3,293,509 A
  • Filed: 12/27/1962
  • Issued: 12/20/1966
  • Est. Priority Date: 12/30/1961
  • Status: Expired due to Term
First Claim
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1. AN ELECTRIC SEMICONDUCTOR DEVICE COMPRISING A PLATE-SHAPED AND SUBSTANTIALLY MONOCRYSTALLINE SEMICONDUCTOR BODY WITH A BROAD-AREA ELECTRODE OF METALLICALLY CONDUCTING DUCTILE MATERIAL, A CONDUCTING TERMINAL STRUCTURE HAVING A CONTACT-PRESSURE PLATE OF METAL WHOSE THERMAL COEFFICIENT OF EXCPANSION IS SIMILAR SO THAT OF SAID SEMICONDUCTOR BODY, SAID PLATE HAVING A COATING OF CONTACT METAL THERMO-COMPRESSIVELY BONDED WITH SAID ELECTRODE MATERIAL, SPRING MEANS CONNECTED WITH SAID STRUCTURE FOR PRESSING SAID BODY AND SAID PLATE TOGETHER , SAID COATING AND SAID ELECTRODE HAVING RESPECTIVE PLANAR SURFACES IN AREA CONTACT WITH EACH OTHER, AT LEAST ONE OF SAID CONTACT SURFACES BEING SUBSTANTIALLY UNIFORMLY ROUGH AND HAVING A ROUGHNESS DEPTH BETWEEN 0.5 TO 50 MICRONS.

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