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Impact ionization devices, and methods of forming impact ionization devices

  • US 9,373,716 B2
  • Filed: 01/27/2014
  • Issued: 06/21/2016
  • Est. Priority Date: 03/24/2008
  • Status: Active Grant
First Claim
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1. An impact ionization device, comprising:

  • a pillar vertically extending from an oxide material and comprising;

    N+ doped silicon vertically adjacent the oxide material;

    undoped epitaxial silicon germanium vertically overlying the N+ doped silicon; and

    P+ doped epitaxial silicon germanium vertically adjacent the undoped epitaxial silicon germanium; and

    a gate adjacent the pillar and comprising a lower portion laterally adjacent the N+ doped silicon of the pillar and an upper surface vertically separated from a lower boundary of the P+ doped epitaxial silicon germanium of the pillar, the undoped epitaxial silicon germanium of the pillar vertically confined between the lower boundary of the P+ doped epitaxial silicon germanium and the upper surface of the gate.

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