Patent ID: 9442259
Filing Date: 2016-09-13
CPC Classification: G02B

Claim Text:
1. A method for producing an optical assembly, comprising the steps of: forming an optical semiconductor device having a first principal surface and a first back surface opposite to the first principal surface, the optical semiconductor device including a substrate, a recess formed in the first principal surface, and a first optical waveguide formed on the substrate, the recess having a first center axis substantially orthogonal to the first principal surface; forming an optical waveguide device having a second principal surface and a second back surface opposite to the second principal surface, the optical waveguide device including a through-hole having a second center axis substantially orthogonal to the second back surface; and a second optical waveguide, the through-hole penetrating through the second principal surface and the second back surface; positioning the optical semiconductor device and the optical waveguide device so that the first principal surface and the second back surface face each other; aligning the optical semiconductor device and the optical waveguide device by inserting a guide pin into the through-hole and the recess, the first center axis of the recess and the second center axis of the through-hole being aligned with each other; and joining the optical semiconductor device and the optical waveguide device to each other, wherein the recess extends from the first principal surface to an end portion in a middle portion of the substrate, the recess includes a first region and a second region arranged adjacent to the first region, the first region has an opening at the first principal surface and a taper portion having a diameter that increases from a boundary surface between the first region and the second region towards the first principal surface, the boundary surface being in the substrate, the second region has the end portion of the recess in the substrate and a taper portion having a diameter that decreases from the boundary surface towards the end portion in the substrate, the taper portion of the first region has a taper ratio greater than a taper ratio of the taper portion of the second region, and in the step of aligning the optical semiconductor device and the optical waveguide device, the first optical waveguide of the optical semiconductor device is optically coupled with the second optical waveguide of the optical waveguide device.