A radiation-sensitive composition includes a low-molecular-weight compound, a solvent and a radiation-sensitive acid-generator other than the low-molecular-weight compound. The low-molecular-weight compound has one or more acid-dissociable groups which decompose by an action of an acid to enhance solubility in an alkaline developing solution and one or more radiation-sensitive acid-generating groups which generate an acid upon application of an active ray or radiation per molecule. The low-molecular-weight compound has a polystyrene-reduced number-average molecular weight (Mn) measured by gel permeation chromatography (GPC) of 500 to 4,000. The low-molecular-weight compound is not obtained from chain growth polymerization of a monomer with an unsaturated bond. A content of the low-molecular-weight compound is 80 mass % or more of 100 mass % of a total solid component of the radiation-sensitive composition. The low-molecular-weight compound is a compound shown by a following formula (1).
一种辐射敏感组合物包括低分子量化合物、溶剂和除低分子量化合物外的辐射敏感酸发生剂。低分子量化合物具有一个或多个酸可解离基团,这些基团在酸的作用下分解,增强在碱性显影液中的溶解度,以及一个或多个辐射敏感酸生成基团,每个分子在施加活性射线或辐射时生成酸。低分子量化合物的聚
苯乙烯还原数平均分子量(Mn)通过凝胶渗透色谱(
GPC)测量为500至4,000。低分子量化合物不是从具有不饱和键的单体的链生长聚合中获得的。低分子量化合物的含量是辐射敏感组合物的100质量%的总固体成分的80质量%或更多。低分子量化合物是以下公式(1)所示的化合物。