Optical waveguide forming material and method
OwnerKinya Kodama, Tsutomu Kashiwagi +1inventors
InventorsKinya Kodama, Tsutomu Kashiwagi, Toshio Shiobara
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Abstract
An optical waveguide-forming material is provided as a photo-curable organopolysiloxane composition comprising (A) a (meth)acryloyloxy group-containing organopolysiloxane resin possessing a siloxane skeleton consisting essentially of organosilsesquioxane units and having a Mw of 1,000-100,000 and (B) a photosensitizer. The material is easy to prepare, inexpensive, and satisfactory in sensitivity and resolution, forms a thick-film coating having heat resistance, moisture resistance and adhesion to a substrate, and allows for easy adjustment of a refractive index.
Claims3
An optical waveguide-forming material in the form of a photo-curable organopolysiloxane composition comprising
- (A) a (meth)acryloyloxy group-containing organopolysiloxane of the following average compositional formula (1):
- (CH2═CR1COO(CH2)n)a(Ph)bR2c(R3O)dSiO(4-a-b-c-d)/2 (1)
- wherein R1 is hydrogen or methyl, R2 is an C1-C8 alkyl or C2-C8 alkenyl group, Ph is phenyl, R3 is hydrogen or an unsubstituted or alkoxy-substituted C1-C4 alkyl group, subscripts a, b, c and d are numbers satisfying:
- 0.05≦a≦0.9, 0.1≦b≦0.9, 0≦c≦0.2, 0<d≦0.5, and 0.8≦a+b+c+d≦1.5, and n is an integer of 2 to 5, and having a weight average molecular weight of 1,000 to 100,000 as measured by GPC using a polystyrene standard, and
- (B) a photosensitizer.
Dependencies are inferred from the claim text.