Patent ID: 9618323
Date: 2017-04-11
CPC Classifications: G01B,G01J

Claim:
1. A method of manufacturing an optical interferometer, the method comprising: a first step of forming a first semiconductor portion for a beam splitter and a second semiconductor portion for a movable mirror on a main surface of a support substrate formed of silicon and a first insulating layer formed on the main surface; a second step of disposing a first wall portion extending along the main surface between a first side surface of the first semiconductor portion at the side of the second semiconductor portion and a second side surface of the second semiconductor portion at the side of the first semiconductor portion; a third step of forming a mirror surface in the second semiconductor portion by forming a first metal film on the second side surface using a shadow mask; and a fourth step of removing the first wall portion after the third step, wherein the shadow mask has a mask portion and a first opening portion provided in the mask portion, and wherein, in the third step, the first side surface is masked by the mask portion and the first wall portion and the first metal film is formed in a state in which the second side portion is exposed from the first opening portion.