A monomer of formula (1) is provided wherein R
1
is hydrogen or a monovalent C
1
-C
6
hydrocarbon group, and R
2
is a group having polymerization functionality. Using the monomer, crosslinking units can be incorporated into a polymer chain. A chemically amplified negative resist composition comprising a base polymer having crosslinking units incorporated therein has a high sensitivity and forms a resist pattern with minimized LER.
提供了一个式子为(1)的单体,其中R1是氢或一价的C1-C6碳氢基团,R2是具有聚合功能的基团。使用这种单体,可以将交联单元并入聚合物链中。具有交联单元的基聚合物的
化学放大负性光阻组合物具有高灵敏度,并形成具有最小LER的光阻图案。