Patent ID: 9590074
Date: 2017-03-07
CPC Classifications: H01L

Claim:
1. A method for preventing epitaxial growth in a semiconductor device comprising patterning a photoresist layer over a semiconductor structure having a set of fin ends on a set of fins of a FinFET structure, wherein the set of fins are isolated from one another by a first dielectric material, wherein the photoresist pattern over the set of fin ends comprises openings over the fin ends; etching a set of trenches in the first dielectric material at the set of fin ends; depositing a layer of a second dielectric material in the set of trenches; removing excess portions of the second dielectric, thereby forming a set of dielectric blocks of the second dielectric material at the set of fin ends; and wherein the set of dielectric blocks prevents epitaxial growth at the set of fin ends in a subsequent epitaxial growth step.