Patent ID: 8932955
Filing Date: 2015-01-13
Classification: H01L

Abstract:
1. A method of forming a hard mask layer comprising: forming a plurality of portions of material that have a lateral dimension D which is defined by a photolithographic process and which are separated by spaces having a lateral dimension equal to D; subsequently forming sidewall spacers along sides of the plurality of portions of material, gaps between neighboring sidewall spacers having a lateral dimension approximately equal to D/3; subsequently removing the plurality of portions of material to leave the sidewall spacers; subsequently transferring a pattern formed by the sidewall spacers to form a plurality of patterned portions of a transfer material; subsequently depositing a hard mask material on the plurality of patterned portions of transfer material; subsequently etching back the hard mask material to leave first hard mask portions filling gaps between patterned portions of transfer material and second hard mask portions that extend along patterned portions of transfer material on one side and are exposed on another side; and subsequently removing the plurality of patterned portions of transfer material.