Patent ID: 11887896
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of manufacturing a semiconductor device, the method comprising:
forming a first gate layer over a raised semiconductor region;
forming a hard mask over the first gate layer;
applying a bottom anti-reflective layer over the hard mask, the bottom anti-reflective layer having a first diffusibility with respect to a first chemical, the bottom anti-reflective layer comprising a polymer with a chromophore group;
patterning the hard mask through the bottom anti-reflective layer;
after the patterning the hard mask, reducing the first diffusibility to a second diffusibility with respect to the first chemical, wherein the reducing the first diffusibility to the second diffusibility comprises applying either isopropyl alcohol or hexamethyldisilazane to the bottom anti-reflective layer; and
removing a portion of the first gate layer using the first chemical while the bottom anti-reflective layer is present.