Patent ID: 9418902
Filing Date: 2016-08-16
CPC Classification: H01L

Claim Text:
1. A method of isolating a semiconductor fin from a substrate, the method comprising: forming a hard mask layer on a top surface of the fin; forming a masking layer around a base portion of the fin and the substrate; forming spacers on a top portion of the fin above the masking layer; removing the masking layer to expose the base portion of the fin and the substrate; and forming an isolation region from the base portion of the fin, the isolation region electrically insulating the top portion of the fin from the substrate, wherein forming an isolation region from the base portion of the fin comprises oxidizing or nitriding the base portion of the fin, and wherein the oxidizing or nitriding comprises performing an ion implantation of the isolation region with a species selected from the group consisting of oxygen and nitrogen.