Patent ID: 7704670

Claim:
A composition comprising: (a) a polymer comprising at least one repeating unit of formula ((A) j R 1 SiO (3-j)/2 ) and at least one repeating unit of formula ((A) k R 2 SiO (3-k)/2 ), where each R 1 individually is the same or different chromophore which absorbs at any actinic wavelength; each R 2 is individually selected from hydrogen, alkyl, alkenyl, and cycloalkyl; each A is an unreacted functional group of a monomer which forms either of the above repeating units; j and k are each integers that fall within the range 0≦j≦1 and 0≦k≦1, the ratio of R 1 to R 2 being from about 1:99 to about 60:40; (b) a halide source which can react with the polymer and is selected from a fluoride and halogenated organic compound that can release halide under heat; and (c) a solvent.