Patent ID: 8828249

Claim:
A method of manufacturing an optical deflector, comprising: forming respective masks, each of which has a predetermined pattern, on both surfaces of a substrate; and etching the substrate from both the surfaces using the masks to form a movable plate and a support portion that supports the movable plate from both sides, wherein, in the step of forming the movable plate and the support portion, the substrate is subjected to over-etching using wet etching to recess at least one portion, which is to be the movable plate, of a side surface of the substrate, and wherein, in the step of forming the masks, each of which has a predetermined pattern, on both the surfaces of the substrate, a mask is formed having: a first mask pattern corresponding to the movable plate; a second mask pattern corresponding to the support portion; and a correction mask pattern for preventing the cross section of a connecting portion of the movable plate and the support portion from becoming smaller compared with the at least one portion.