Patent ID: 7483115

Claim:
A method of laser processing a liquid crystal device wafer which is formed by laminating together a silicon substrate and a glass substrate and has liquid crystal chambers between the silicon substrate and the glass substrate, each of which being provided with a liquid crystal injection port communicating therewith, in rectangular areas sectioned by streets arranged in a lattice pattern on one of the outer surfaces and a plurality of drive electrodes arranged adjacent to each of the liquid crystal chambers on the silicon substrate, the method comprising the steps of: a first deteriorated layer forming step for forming a deteriorated layer along the streets in the inside of the silicon substrate by applying a laser beam of a wavelength capable of passing through the silicon substrate and forming a deteriorated layer in the inside of the silicon substrate from the glass substrate side with its focal point set to the inside of the silicon substrate; and a second deteriorated layer forming step for forming a deteriorated layer along the streets in the inside of the glass substrate by applying a laser beam of a wavelength capable of passing through the glass substrate and forming a deteriorated layer in the inside of the glass substrate with its focal point set to the inside of the glass substrate.