Patent ID: 9105686
Filing Date: 2015-08-11
Classification: H01L

Abstract:
1. A method of forming a semiconductor structure comprising: providing a patterned material stack having at least one opening on an upper surface of a semiconductor substrate; forming at least one trench within the semiconductor substrate utilizing said patterned material stack as an etch mask; filling said at least one trench and said at least opening with an oxide; recessing portions of said oxide below said upper surface of said semiconductor substrate to expose sidewall surfaces of said semiconductor substrate within said at least one trench, wherein said recessing comprises removing said patterned material stack, forming a patterned photoresist over a central portion of said oxide, etching said portions of said oxide not protected by said patterned photoresist and removing said patterned photoresist to provide a pair of recessed openings that are separated by an oxide pillar extending upward from a remaining portion of said oxide; and epitaxially growing a semiconductor material from said exposed sidewall surfaces, wherein said semiconductor material completely fills each recessed opening.