Patent ID: 6562465
Filing Date: 2003-05-13
Classification: C08K,C09D,G03F,Y10T

Abstract:
A coating liquid for forming a silica-containing film with a low dielectric constant on a substrate, comprising:(i) fine particles of silica having a phenyl group thereon, and (ii) a polysiloxazane obtained by reacting a hydrolyzate or hydrolyzates of an alkoxysilane represented by the general formula (I) and/or a halogenated silane represented by the general formula (II) with a polysilazane represented by the general formula (III), each of the formulae is shown below: XnSi(OR1)4âˆ’nâ€ƒâ€ƒ(I) XnSiXâ€²4âˆ’nâ€ƒâ€ƒ(II), and wherein X represents a hydrogen atom, a fluorine atom, an unfluorinated or fluorinated alkyl group having 1 to 8 carbon atoms, an aryl group or a vinyl group; each of R1, R2, R3 and R4 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an aryl group or a vinyl group; Xâ€² represents a halogen atom; and m is an integer while n is an integer of 0 to 3.