Patent ID: 9103976
Filing Date: 2015-08-11
Classification: G02B

Abstract:
1. A method for manufacturing a waveguide-type semiconductor device, the method comprising the steps of: preparing a wafer having a plurality of device sections that each include a first area, a second area, and a third area arranged in a direction of a waveguide axis; forming an epitaxial structure on a main surface of the wafer, the epitaxial structure including a waveguide mesa disposed on the first area of at least one of the device sections and a device mesa disposed on the second area of the at least one device section, the device mesa having a side surface extending in a direction of the waveguide axis and an end surface extending in a direction orthogonal to the waveguide axis; forming a mask for selective growth on the epitaxial structure; growing a semiconductor region on the side surface and the end surface of the device mesa by using the mask for selective growth so that the semiconductor region grown on the end surface of the device mesa includes a side portion having a layer shape and a protruding wall portion protruding from the side portion in a direction perpendicular to a top surface of the device mesa; forming an ohmic electrode on the top surface of the device mesa after growing the semiconductor region; forming a resin layer on the device mesa and the semiconductor region, the resin layer covering the protruding wall portion after forming the ohmic electrode; forming a resin mask having a first opening located on the ohmic electrode and a second opening located on the third area of the at least one device section; forming an electric conductor that includes a first conductive portion disposed in the first opening and connected to the ohmic electrode, a second conductive portion disposed in the second opening and supported on the third area of the at least one device section, and a third conductive portion that extends from the first conductive portion to the second conductive portion, the third conductive portion passing over the protruding wall portion while making contact with a surface of the resin mask; and removing the resin mask after forming the electric conductor.