Patent ID: 8066806

Claim:
A silicon oxide vapor deposition film comprising a film substrate composed of an organic polymer and a sintered silicon oxide deposited on the surface of the film substrate, wherein the sintered silicon oxide has: (1) a density of 1.0 to 2.0 g/cm 3 , (2) a three-point flexural strength of at least 50 g/mm 2 , and (3) BET specific surface area of 0.1 to 20 m 2 /g, wherein the sintered silicon oxide is formed by sintering a mixture of (a) a powder of silicon oxide represented by the formula: SiO x wherein 1≦x<1.2, and (b) a powder of silicon dioxide (SiO 2 ) having a BET surface area of at least 30 m 2 /g, at a weight ratio SiO 2 /SiO x in the range of 0.05≦1.0.