Patent ID: 9343309
Filing Date: 2016-05-17
CPC Classification: H01L

Claim Text:
1. A method of forming features on a substrate, the method comprising: forming a layer of sacrificial structural material on the substrate; patterning the layer of sacrificial structural material using a photolithography process to form a plurality of cores; wherein at least one of the plurality of cores has a first linewidth and the plurality of cores are separated by first trenches and spaced according to a first pitch; laterally oxidizing the plurality of cores to form a plurality of oxidation spacers around a plurality of unoxidized cores, wherein at least one of the plurality of unoxidized cores has a second linewidth and the at least one of the plurality of caps retains the first linewidth; and removing the plurality of cores leaving the plurality of oxidation spacers separated by second trenches and spaced according to a second pitch that is less than the first pitch, wherein at least one of the plurality of oxidation spacers has a third linewidth.