Patent ID: 7910284

Claim:
A mixture of polynuclear phenol compounds having in one molecule 0 to 6 functional groups which are chemically converted due to actions of an acid with reduced solubility in an alkaline developer, wherein the polynuclear phenol compound is expressed by the following chemical formula (1) and has a structure in which the functional group is bonded to a phenolic hydroxyl group of the polynuclear phenol compounds, and two or more triphenyl methane structures are coupled by a nonconjugate bond, to portions other than the functional group, and the mixture comprises polynuclear phenol compounds with the average number of functional groups of 2.5 or below and includes the polynuclear phenol compounds not having any functional group per molecule by 15% or less in the term of weight ratio, and the polynuclear phenol compounds having 3 or more functional groups per molecule by 40% or less: where A in the chemical formula (1) denotes a linear or branched alkyl group, or a cyclic alkyl group having 1 to 10 carbon atoms, where Y in the chemical formula (1) denotes a hydrogen atom or a functional group which is chemically converted with the reduced solubility in an alkaline developer; and each of R 11 , R 12 , R 13 , R 14 , R 15 , R 16 , R 17 , R 8 , R 19 , R 20 , R 21 , R 22 , R 23 , R 24 , R 25 , R 26 , R 27 , and R 11 denotes a hydrogen atom or a group selected from the group consisting of alkyl groups or aromatic hydrocarbon groups having 1 to 10 carbon atoms.