Patent ID: 8043791

Claim:
A positive photosensitive composition, comprising: (A) a resin containing a repeating unit represented by the following formula (I) and being capable of increasing a solubility of the resin (A) in an alkali developer by an action of an acid; and (B) a compound capable of generating an acid upon irradiation with an actinic ray or radiation: wherein each of R 1 and R 2 represents a monovalent organic group, and R 1 and R 2 may be the same or different and may combine with each other to form a cyclic structure; each of R 3 to R 6 represents a hydrogen atom or a monovalent organic group, and R 3 to R 6 may be the same or different and may combine with each other to form a cyclic structure; L 1 represents a divalent linking group; L 2 represents a single bond or a divalent linking group; each of m and n represents an integer of 0 to 5, and m+n is 3 or more; R 7 represents a hydrogen atom, an alkyl group or a —CH 2 —O—Ra group, wherein Ra represents a hydrogen atom, an alkyl group or an acyl group; and p represents an integer of 1 to 3.