Prismatic patterns with a pitch of 30 pm and a slant height of 30 mum were
embossed successfully in 70:30 (in mol %) methylsilsesequioxine:phenylsilse
sqeioxene (MeSiO3/2-PhSiO3/2) thick films on glass substrates by laminating
an organic polymer sheet as a stamper with the patterns against the films.
The embossed shape of the prismatic patterns precisely agreed with the neg
ative shape of those of the stamper that was used. The resultant MeSiO3/2-P
hSiO3/2 films were transparent, and the refractive index of the films was a
djusted to 1.51, to match that of the glass substrate.