Patent ID: 9703200
Date: 2017-07-11
CPC Classifications: G03F

Claim:
1. A method of forming an electronic device, comprising in sequence: (a) providing a semiconductor substrate comprising one or more layers to be patterned; (b) forming a photoresist layer over the one or more layers to be patterned, wherein the photoresist layer is formed from a composition that comprises: a matrix polymer comprising a unit having an acid labile group; a photoacid generator; and an organic solvent; (c) coating a photoresist overcoat composition over the photoresist layer, wherein the overcoat composition comprises a quenching polymer and an organic solvent, wherein the quenching polymer consists essentially of a first repeating unit having a basic moiety effective to neutralize acid generated by the photoacid generator in a surface region of photoresist layer, and a second repeating unit formed from a monomer of the following general formula (I):  wherein: R (d) exposing the photoresist layer to activating radiation; (e) heating the substrate in a post-exposure bake process; and (f) developing the exposed photoresist layer with an organic solvent developer.