Patent ID: 8945963
Filing Date: 2015-02-03
Classification: H01L

Abstract:
1. An optical device processing method comprising: a groove forming step of forming a plurality of grooves on a front side of a sapphire substrate; a film forming step of forming an epitaxial film on the front side of the sapphire substrate after performing the groove forming step, thereby forming a plurality of optical devices and a plurality of crossing division lines for partitioning the optical devices, said grooves relieving stresses due to the difference in coefficient of thermal expansion or lattice constant between the sapphire substrate and the epitaxial film, thereby preventing the occurrence of warpage of the sapphire substrate; a division start point forming step of forming division start points along the crossing division lines; and a dividing step of dividing the sapphire substrate with the epitaxial film along the division lines after performing the division start point forming step, thereby obtaining a plurality of individual optical device chips.