Patent ID: 8772864
Filing Date: 2014-07-08
Classification: H01L

Abstract:
1. A trench Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) device, comprising: a substrate including a substrate layer and an epitaxial layer formed on the substrate layer; a body region formed in the epitaxial layer; a source region formed in the body region of the epitaxial layer; a dielectric layer formed on the epitaxial layer; a metal layer formed on the dielectric layer; a contact hole formed in the dielectric layer to connect the source region with the metal layer; and a trench structure formed in the epitaxial layer, wherein the trench structure includes a first trench that is a pectinate trench including a plurality of tooth trenches and a bar trench interconnecting the plurality of tooth trenches, wherein a total length of all of the plurality of tooth trenches corresponds to a channel width of the MOSFET device, and wherein the channel width is equal to a contact hole side outer perimeter of the trench structure.