Patent ID: 6319551
Filing Date: 2001-11-20
Classification: C03C,C04B,C08G,C09D,G02B,H01L,Y10T

Abstract:
A method of producing a silica film on a substrate comprising the steps of:a) preparing a carboxylated silicone precursor composition;b) applying the carboxylated silicone precursor composition to the surface of a substrate to form a precursor film; and,c) thermally oxidizing the precursor film to form a silica film,wherein said carboxylated silicone precursor composition is selected from the group consisting of polygermanosiloxanes represented by Formula 3: ##STR10##where R.sub.1 -R.sub.5 are alkyl groups, R.sub.6 is (CH.sub.2).sub.3 and n, m, and k are relative proportions such that n+m+k=1 with k/(n+m+k) ranging from 0.1 to 0.60; and vinyl containing polygermanosiloxane represented by Formula 6 ##STR11##where R.sub.1 and R.sub.2 are alkyl or alkenyl groups, R.sub.3 is an alkane fragment and R.sub.4 is vinyl (CHCH.sub.2), and n,a,b,c,d,e and f are relative proportions such that n/(n+a+b+c+d+e+f) is from 0.01 to 0.5, (d+e+f)/(n+a+b+c+d+e+f) is from 0.01 to 0.99 and(a+b+c)/(n+a+b+c+d+e+f) is from 0.01 to 0.99.