Patent ID: 8791387

Claim:
A laser cutting method for cutting a laminated glass substrate that is formed by laminating at least a pair of glass substrates, comprising the steps of: providing a pattern member between the pair of the glass substrates in a manner that the pattern member is contacting inner sides of both of the glass substrates and along a cutting position of the laminated glass substrate, the pattern member having a characteristic of absorbing light of a wavelength that transmits through either of the glass substrates; cooling the laminated glass substrate; while cooling the laminated glass substrate, generating heat in the pattern member by irradiating a surface side of a first one of the glass substrates of the laminated glass substrate with a laser beam of the wavelength that transmits through the glass substrates and letting the laser beam transmit through the first one glass substrate to irradiate the pattern member, wherein in irradiating of the surface side of the first one glass substrate with the laser beam, the laser beam irradiates the laminated glass substrate only through an exterior surface of the surface side of the first one glass substrate from one side; and cutting both of the pair of glass substrates at once by generating cracking from and at an inner part of each of the glass substrates in contact with the pattern member by using the heat transferred from the pattern member to both of the glass substrates forming the laminated glass substrate, whereby the laminated glass substrate is cut along the pattern member along a generated crack.