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Transistor device and method for manufacturing the same

  • US 8,659,079 B2
  • Filed: 05/29/2012
  • Issued: 02/25/2014
  • Est. Priority Date: 05/29/2012
  • Status: Active Grant
First Claim
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1. A transistor device comprising a first vertical transistor structure, wherein the first vertical transistor structure comprises:

  • a substrate;

    a first dielectric layer disposed in a first trench of the substrate;

    a first gate disposed in the first dielectric layer, wherein the first gate defines, at both sides thereof, a first channel region and a second channel region in the substrate, wherein the first gate has a cylindrical structure, and the first channel region and the second channel region are respectively a curved channel disposed at both sides of the cylindrical structure;

    a first doped region disposed in the substrate, wherein the first doped region is located below the first channel region;

    a second doped region disposed in the substrate, wherein the second doped region is located above the first channel region;

    a third doped region disposed in the substrate, wherein the third doped region is located below the second channel region; and

    a fourth doped region disposed in the substrate, wherein the fourth doped region is located above the second channel region.

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