Patent ID: 7333704

Claim:
A method for producing a resin-made, multichannel, optical path changing device, characterized in comprising six steps of: 1) forming a film of a sacrifice layer on a temporary substrate; 2) forming a film of a cladding layer thereon and selectively etching the cladding layer, thereby forming a parallelepiped block by the cladding resin; 3) forming a film of a core layer by a core resin to cover the block; 4) simultaneously forming a multichannel core having a core perpendicular to the substrate and a core parallel with the substrate, which are monolithically formed, by selectively etching the core layer and the block, and conducting a filling with a cladding resin; 5) forming a V-groove at a corner portion of the core in order to form a mirror surface and forming a reflecting film as the mirror surface; and 6) conducing a filling with a cladding resin, attaching a substrate thereon, and, after removing the temporary substrate and the sacrifice layer of the step 1), conducting a cutting and separation into multichannel optical path changing devices.