Patent ID: 9568821
Date: 2017-02-14
CPC Classifications: G03F

Claim:
1. A patterning process comprising: forming a resist top coat on a photoresist film on a substrate by using a resist top coat composition that contains a polymer having a repeating unit p of styrene having a 1,1,1,3,3,3-hexafluoro-2-propanol group shown in the following general formula (1), wherein m is 1 or 2, and p is 0<p≦1.0; exposing the formed resist top coat and the photoresist film to an electron beam or to extreme ultraviolet (EUV) light having a wavelength 3 nm to 15 nm; and developing the exposed photoresist film and the exposed resist top coat by using an organic-solvent-based developer to form a negative pattern; and wherein the step of developing the exposed photoresist film and the exposed resist top coat simultaneously removes the resist top coat: