A negative pattern is formed by applying a resist composition onto a substrate, exposing the resist film, and developing the exposed resist film in an organic solvent developer. The process further involves coating the negative pattern with a shrink agent solution of a polymer comprising recurring units capable of forming lactone under the action of acid in a C
7
-C
16
ester or C
8
-C
16
ketone solvent, baking the coating, and removing the excessive shrink agent via organic solvent development for thereby shrinking the size of spaces in the pattern.
PATTERN FORMING PROCESS
申请人:SHIN-ETSU CHEMICAL CO., LTD.
公开号:US20170010537A1
公开(公告)日:2017-01-12
A negative tone pattern is formed by coating a resist composition onto a substrate, prebaking to form a resist film, exposing the resist film to high-energy radiation, PEB the resist film in a high-humidity environment, and developing the resist film in an organic solvent developer. PEB in a high-humidity environment is effective for reducing the shrinkage of the resist film during the step and thus preventing the trench pattern from deformation.