Patent ID: 7995875

Claim:
A mirror embedded polymer optical waveguide, comprising: a core; an overclad covering the core; an underclad lying under the core; an angled cut face configured to be a mirror groove from the overclad through the core into the underclad, a bottommost portion of the angled cut face being positioned approximately 20 μm deeper than a bottom of the core, 10 μm or more being a distance between the bottommost portion of the angled cut face and a bottom surface of the underclad, the angled cut face having a surface roughness with projections and depressions; an adhesive layer formed on the angled cut face with which the depressions of the surface roughness of the angled cut face are filled, the adhesive layer having approximately the same refractive index as that of the core; a metal film formed on the adhesive layer, the metal film being formed by transfer and in contact with the projections of the surface roughness of the angled cut face to be the mirror; another adhesive formed in the mirror groove and on the metal film; and a reinforcing plate covering a top opening of the mirror groove.