Patent ID: 7985357

Claim:
A method employing a die including a top piece, a bottom piece having a cavity and opposing said top piece, and an intermediate piece arranged between said top piece and said bottom piece, and a mold release film covering said cavity to seal and mold an optical device in said cavity with resin, the method comprising: attaching to said top piece a substrate having said optical device mounted thereon; bringing said mold release film, sandwiched between said bottom piece and said intermediate piece, into contact with said cavity's entire surface along said cavity's geometry before closing said top piece, said bottom piece, and said intermediate piece together, said intermediate piece being arranged between said top piece and said bottom piece without defining said cavity; closing said top piece, said bottom piece, and said intermediate piece together such that said intermediate piece presses the mold release film against said bottom piece at a position outside the substrate without making contact with the substrate to prevent the release film from moving relative to said bottom piece and said intermediate piece, and thereby inserting said optical device into melted resin or resin in liquid form existing within said cavity, so that a space inside said cavity is filled with said melted resin or resin in liquid form; setting said melted resin or said resin in liquid form to provide transparent set resin; separating said top piece, said bottom piece, and said intermediate piece; and removing from said top piece said substrate having said optical device sealed in said transparent set resin.