申请人:SHIN-ETSU CHEMICAL CO., LTD.
公开号:US20140212810A1
公开(公告)日:2014-07-31
A polymer comprising recurring units (a) of styrene having an HFA group and an ester group adjacent thereto and recurring units (b) having a hydroxyl group is used as base resin to formulate a negative resist composition. The negative resist composition has a high dissolution contrast in alkaline developer, high sensitivity, high resolution, good pattern profile after exposure, and a suppressed acid diffusion rate.