The photoacid generator produces a sulfonic acid which has a bulky cyclic structure in the sulfonate moiety and a straight-chain hydrocarbon group and thus shows a controlled acid diffusion behavior and an adequate mobility. The PAG is fully compatible with a resin to form a resist composition which performs well during the device fabrication process and solves the problems of resolution, LWR, and exposure latitude.
照片酸发生剂会产生一种含有笨重环状结构的
磺酸基团和直链碳氢基团的
磺酸,因此表现出受控的酸扩散行为和适度的活性。该PAG与
树脂完全兼容,形成一个抗蚀剂组合物,在器件制造过程中表现良好,并解决了分辨率、LWR和曝光容限等问题。