Patent ID: 9543298
Date: 2017-01-10
CPC Classifications: H01L

Claim:
1. A method comprising: etching rows of fins into a substrate of a structure from a patterned fin hardmask, the remaining fin hardmask being self-aligned with top surfaces of the fins; disposing and planarizing a first dielectric fill material over the structure to expose top surfaces of the fin hardmask; disposing a photoresist layer over the structure; patterning an isolation region across the fins to form first and second parallel fin arrays abutting the isolation region, any remaining photoresist layer having self-aligned edges which are self-aligned with the isolation region; trimming the self-aligned edges to expose end portions of the fin hardmask; removing the exposed end portions of the fin hardmask; removing the remaining photoresist layer; and disposing and planarizing a second dielectric fill material over the structure to form a base for a single diffusion break (SDB) in the isolation region.