There is provided a photobase generator and a photosensitive resin composition containing the photobase generator. The photobase generator includes an ammonium salt represented by general formula (1). In formula (1), R
1
to R
4
independently represent an alkyl group having 1 to 18 carbon atoms or Ar, wherein at least one of R
1
to R
4
represents Ar; Ar represents an aryl group having 6 to 14 carbon atoms (excluding carbon atoms contained in a substituent as mentioned below), wherein some of hydrogen atoms in the aryl group may be independently substituted by an alkyl group having 1 to 18 carbon atoms or the like; Y
+
represents an ammonio group represented by general formula (2) or (3); and E represents a hydrogen atom or a group represented by general formula (5).
提供了一种光碱基发生剂和含有该光碱基发生剂的光敏
树脂组合物。光碱基发生剂包括由通式(1)表示的
铵盐。在通式(1)中,R1至R4分别代表具有1至18个
碳原子的烷基基团或Ar,其中至少有一个R1至R4代表Ar;Ar代表具有6至14个
碳原子的芳基团(不包括下文所述取代基中的
碳原子),芳基团中的一些
氢原子可以独立地被具有1至18个
碳原子的烷基基团或类似物所取代;Y+表示由通式(2)或(3)表示的
铵基团;E表示
氢原子或由通式(5)表示的基团。