Patent ID: 9722078
Date: 2017-08-01
CPC Classifications: H01L

Claim:
1. A semiconductor device, comprising: a silicon substrate; a fin shaped structure including a top portion which protrudes form a bottom surface of the fin shaped structure disposed directly on the silicon substrate, wherein the bottom surface of the fin shaped structure covering an entire top surface of the silicon substrate and comprising a silicon germanium layer extending within the fin shaped structure including the bottom surface of the fin shaped structure and occupying from 80% to 90% of a height of the fin shaped structure from top to bottom, wherein the fin shaped structure is a semiconductor fin shaped structure, and the material of the silicon substrate is different from the material of the silicon germanium layer; a silicon oxide layer disposed directly on a lower sides of the top portion and the bottom surface of the fin shaped structure, a shallow trench isolation disposed on the silicon oxide layer covering the lower sides portion of the fin shaped structure that is protruded from a bottom surface of the fin shaped structure and a top surface of the silicon oxide layer, and wherein a bottom surface of the silicon oxide layer is higher than a bottom surface of the silicon germanium layer that is within the bottom surface of the fin shaped structure.