Sulfonium salt, acid generator, resist composition, photomask blank, and patterning process
申请人:Ohashi Masaki
公开号:US08394570B2
公开(公告)日:2013-03-12
A sulfonium salt has formula (1) wherein R1 is a monovalent hydrocarbon group except vinyl and isopropenyl, R2, R3, and R4 are alkyl, alkenyl, oxoalkyl, aryl, aralkyl or aryloxoalkyl or may bond together to form a ring with the sulfur atom, and n is 1 to 3. A chemically amplified resist composition comprising the sulfonium salt is capable of forming a fine feature pattern of good profile after development due to high resolution, improved focal latitude, and minimized line width variation and profile degradation upon prolonged PED.
一种硫鎓盐的化学式为(1),其中R1是一种单价碳氢基团,除去乙烯基和异丙烯基,R2、R3和R4是烷基、烯基、氧代烷基、芳香基、芳香烷基或芳香氧代烷基,或者它们可以结合在一起形成与硫原子相连的环,n为1至3。包含该硫鎓盐的化学增强型光刻胶组合物由于具有高分辨率、改善的焦点宽度、最小化的线宽变化和长时间暴露后的剖面降解,能够形成良好的细微结构图案。