Patent ID: 7018774

Claim:
An infrared sensitive composition comprising: (A) an alkali-soluble resin having a phenolic hydroxyl group; (B) a light-heat converting substance; and (C) a leucohydroxy dye represented by the following general formula (I): wherein Ar 1 and Ar 2 each may be the same or different and represent an aryl group or a heteroaryl group, which may have a substituent group; R 1 to R 4 each may be the same or different and represent a hydrogen atom or an alkyl group which may have a substituent; Y represents a hydrogen atom, or an alkyl, aryl or heteroaryl groups which may have a substituent; when at least one of Ar 1 and Ar 2 , or Y is an aryl group, at least one of Ar 1 , Ar 2 and Y has as a substituent a hydroxy group, an amino group, a monoalkylamino group or a dialkylamino group at the ortho or para position; two of Ar 1 , Ar 2 and Y may link together through a connecting group to form a ring; and m and n each represent 0 or 1.