Patent ID: 9666441
Date: 2017-05-30
CPC Classifications: H01L

Claim:
1. A method of manufacturing a semiconductor device, the method comprising: patterning a first mask material over a substrate to have a first opening having a first width, wherein the first mask material has a first thickness and the first opening has a first depth less than the first thickness; irradiating the first mask material with an ion beam after the patterning the first mask material to form an irradiated first mask material, wherein the irradiating the first mask material reshapes the first mask material to form a second opening of the first mask material from the first opening of the first mask material, wherein the second opening of the first mask material has a second width smaller than the first width, and wherein the first width and the second width are measured at a same distance from the substrate; and patterning the substrate using the irradiated first mask material as a mask.