Patent ID: 9390976
Filing Date: 2016-07-12
CPC Classification: H01L

Claim Text:
1. A method of forming a semiconductor device comprising: forming a fin structure from a bulk semiconductor substrate, wherein an upper surface of the fin structure is provided by an upper surface of the bulk semiconductor substrate and a length of a sidewall of the fin structure extends from the upper surface of the fin structure to a recessed surface of the bulk semiconductor substrate present at a base of the fin structure; forming an undoped epitaxial semiconductor material on the fin structure, wherein a first portion of undoped epitaxial semiconductor material is formed on the sidewall of at least one of a source region portion and a drain region portion of the fin structure, and a second portion of the undoped epitaxial semiconductor material is formed on the recessed surface of the bulk semiconductor substrate that is present at the base of the fin structure; and forming a doped epitaxial semiconductor material on the undoped epitaxial semiconductor material, wherein the undoped epitaxial semiconductor material and the doped epitaxial semiconductor material provide a source region and drain region to the semiconductor device including the fin structure.