Patent ID: 9709800
Date: 2017-07-18
CPC Classifications: B81B,B81C,G02B

Claim:
1. A manufacturing method of an electro-optical device, comprising: preparing a first wafer which is provided with a first mirror and a first driving element that drives the first mirror in a first region on a first face side, and which is provided with a second mirror and a second driving element that drives the second mirror in a second region which is adjacent to the first region on the first face side; forming a light-transmitting second wafer which has a second face with a first concave section, a second concave section and a first groove; adhering the first face of the first wafer and the second face of the second wafer such that the first mirror and the first driving element overlap with the first concave section in planar view and such that the second mirror and the second driving element overlap with the second concave section in planar view; and splitting the first wafer and the second wafer along a region between the first region and the second region in planar view, wherein the first groove is formed simultaneously with the first concave section and the second concave section, and is formed between the first concave section and the second concave section on the second face of the second wafer, and dicing of the second wafer is performed in which the second wafer is split by a second wafer dicing blade being thrust to reach the first groove from a third face side which is a face on an opposite side to the second face of the second wafer, in the splitting of the first wafer and the second wafer.