Patent ID: 9405168
Filing Date: 2016-08-02
CPC Classification: C30B,G02F

Claim Text:
1. A method of fabricating a wavelength conversion device, the device being fabricated from a crystal substrate and having a structure that is periodically polarization-reversed in the direction perpendicular to a thickness direction of the crystal substrate formed from a ferroelectric crystal demonstrating a non-linear optical effect, the method comprising: heating the crystal substrate; and removing electricity on a surface of the crystal substrate when temperature of the crystal substrate being changing due to the heating, the method further comprising: forming an insulating layer on at least one plane of the crystal substrate; forming a pattern with line-and-space of the insulating layer; and periodically applying voltage to the crystal substrate using the formed pattern with line-and-space of the insulating layer, wherein the heating is carried out after the forming the insulating layer, and before or after the forming the pattern.