Patent ID: 7205085

Claim:
A radiation sensitive dielectric constant changing composition, comprising: (A) an acid decomposable compound which contains at least one of compounds having at least one of structures represented by the following formulas (1) to (6) and (10): wherein R 1 is an alkylene group, alkylene-arylene-alkylene group or arylene group, and R 2 is an alkylene group, alkylene-arylene-alkylene group, arylene group, alkylsilylene group or alkylgermylene group, wherein M is Si or Ge, R 3 is an alkylene group, alkylene-arylene-alkylene group, arylene group, alkylsilylene group or alkylgermylene group, R 4 is an oxygen atom, alkylene group, alkylene-arylene-alkylene group, arylene group or single bond, R 5 , R 6 , R 7 and R 8 are each independently a hydrogen atom, alkyl group, aryl group, alkoxyl group or thioalkyl group, and m is an integer of 0 to 2, wherein R 9 and R 10 are each independently an alkylene group, alkylene-arylene-alkylene group, arylene group, alkylsilylene group or alkylgermylene group, wherein R 11 is an oxyalkylene group or single bond, and R 12 is a hydrogen atom, alkyl group, alkylene-arylene-alkylene group or aryl group, wherein R 13 is a hydrogen atom, alkyl group or aryl group, wherein R 14 is an alkylene group or a structure represented by the following formula (7), (8) or (9), wherein R 15 , R 16 , R 17 and R 18 are each independently a hydrogen atom, chain alkyl group having 1 to 6 carbon atoms, chlorine atom, bromine atom, iodine atom, hydroxyl group, mercapto group, carboxyl group, alkoxyl group having 1 to 6 carbon atoms, alkylthio group having to 1 to 6 carbon atoms, haloalkyl group having 1 to 6 carbon atoms, haloalkoxyl group having 1 to 6 carbon atoms, haloalkylthio group having 1 to 6 carbon atoms, hydroxyalkyl group having 1 to 6 carbon atoms, mercaptoalkyl group having 1 to 6 carbon atoms, hydroxyalkoxyl group having 1 to 6 carbon atoms, mercaptoalkylthio group having 1 to 6 carbon atoms, aryl group having 6 to 10 carbon atoms or aralkyl group having 7 to 11 carbon atoms, —O—R 19 —O— (8) wherein R 19 is an alkylene group, —NH—R 20 —NH— (9) wherein R 20 is an alkylene group, wherein R 21 is an alkylene group, alkylene-arylene-alkylene group or arylene group, (B) an acid nondecomposable compound, (C) a radiation sensitive decomposer which is a radiation sensitive acid generator, and optionally (D) a stabilizer, wherein the amount of said nondecomposable compound (B) is 5 to 90 parts by weight based on 100 parts by weight of the total of said decomposable compound (A) and said nondecomposable compound (B).