A polymer comprises the polymerized product of monomers comprising an acid-deprotectable monomer, a base-soluble monomer, a lactone-containing monomer, and a photoacid-generating monomer; a chain transfer agent of the formula;
wherein Z is a y valent C1-20 organic group, x is 0 or 1, Rd is a substituted or unsubstituted C1-20 alkyl, C3-20 cycloalkyl, C6-20 aryl, or C7-20 aralkyl; and optionally, an initiator.
一种聚合物由以下单体的聚合产物组成:一种可酸保护的单体、一种碱溶性单体、一种含内酯的单体和一种产生光酸的单体;一种链转移剂,其
化学式为
其中 Z 是 y 价 C1-20 有机基团,x 是 0 或 1,Rd 是取代或未取代的 C1-20 烷基、C3-20 环烷基、C6-20 芳基或 C7-20 芳烷基;以及可选的
引发剂。