Patent ID: 9412603
Filing Date: 2016-08-09
CPC Classification: H01L

Claim Text:
1. A method of forming a fin structure on a substrate, comprising: etching a silicon layer to form a trench defining a silicon mandrel structure; oxidizing sidewalls of the silicon mandrel structure and a bottom surface of the trench to form an oxidized surface which incorporates silicon consumed from the silicon mandrel structure; etching the oxidized surface to reduce a width of the silicon mandrel structure; depositing an insulator material over the silicon layer after the etching the oxidized surface; implanting ions into the silicon mandrel structure and the insulator material to form an implanted region which correlates to an etch stop; etching the silicon mandrel structure to the implanted region; forming a semiconducting material on the silicon mandrel structure, the semiconducting material bounded by the insulator material; and planarizing a portion of the insulator material and the semiconducting material.