Patent ID: 8691602
Filing Date: 2014-04-08
Classification: B23K,H01L

Abstract:
1. A method for producing a semiconductor light-emitting chip, comprising: a dividing groove forming process for forming a plurality of dividing grooves on a semiconductor lamination substrate, in which a semiconductor layer containing a group III nitride semiconductor is laminated on a front surface of a sapphire substrate having the front surface and a back surface, the front surface being composed of a C-plane of a sapphire single crystal constituting the sapphire substrate, the plurality of dividing grooves being formed in a first direction along an M-plane of the sapphire single crystal and the front surface of the sapphire substrate from a side on which the semiconductor layer is laminated; a modified region forming process for forming, in the sapphire substrate, a plurality of first modified regions extending toward the first direction and a plurality of second modified regions extending along the front surface of the sapphire substrate and toward a second direction different from the first direction by irradiating the semiconductor lamination substrate, on which the plurality of dividing grooves are formed, with laser light from a side of the back surface; and a dividing process for dividing the semiconductor lamination substrate, in which the plurality of first modified regions and the plurality of second modified regions are formed, by use of the plurality of first modified regions and the plurality of second modified regions, wherein, in the dividing groove forming process, any dividing groove extending toward the second direction is not formed on the semiconductor lamination substrate from the side on which the semiconductor layer is laminated.