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Integrated circuit device

  • US 5,696,402 A
  • Filed: 05/22/1995
  • Issued: 12/09/1997
  • Est. Priority Date: 09/28/1965
  • Status: Expired due to Fees
First Claim
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1. An integrated circuit device comprising:

  • a solid state material having a selected shape and comprising a substrate of a first solid material having an upper surface and a bottom major surface, and further comprising a pocket of a second solid material, said pocket having a side surface and a lower surface which makes electronic contact with a selected portion of said upper surface of said substrate;

    said materials of said substrate and of said pocket being so selected as to form, where said lower surface of said pocket makes electronic contact with said selected portion of said upper surface of said substrate, an electronic interfacial barrier which is substantially conductive under an applied bias of at least one selected polarity; and

    wall means extending into said pocket to define a groove which adjoins at least said side surface of said pocket;

    on a cross-section in a plane normally of said bottom surface of said substrate, said groove having a first curved portion which is in a vicinity of said barrier and has a first prespecified radius of curvature of less than one micron;

    on a cross-section in a plane normally of said bottom major surface of said substrate, said groove having a second curved portion which has a second prespecified radius of curvature;

    said second prespecified radius of curvature being significantly greater than said first prespecified radius of curvature but less than 1 cm.

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