申请人:Shin-Etsu Chemical Co., Ltd.
公开号:US07514202B2
公开(公告)日:2009-04-07
A thermal acid generator of generating an acid on heating above 100° C. has formula: CF3CH(OCOR)CF2SO3−(R1)4N+ wherein R is alkyl or aryl, R1 is hydrogen, alkyl, alkenyl, oxoalkyl, aryl, aralkyl or aryloxoalkyl, or R1 may bond together to form a ring with N. The sulfonic acid generated possesses an ester site within molecule so that less bulky acyl groups to bulky groups may be incorporated therein. The thermal acid generator provides a sufficient acid strength, is less volatile due to a high molecular weight, and ensures film formation. Upon disposal of used resist liquid, it may be converted into low accumulative compounds.
一种热酸发生剂,在加热至100°C以上时生成酸,其化学式为:CF3CH(OCOR)CF2SO3−(R1)4N+,其中R为烷基或芳基,R1为氢、烷基、烯基、氧代烷基、芳基、芳基烷基或芳基氧代烷基,或者R1可能结合在一起形成与N的环。生成的磺酸具有分子内的酯位,因此较小的酰基可以与较大的基团结合在一起。这种热酸发生剂提供足够的酸强度,由于分子量较高,挥发性较低,并确保膜的形成。在处理废弃的抗蚀液时,它可以转化为低积累化合物。