Patent ID: 8420502

Claim:
A method for producing a Group III-V semiconductor device, the method comprising: forming, on a base, a plurality of semiconductor devices isolated from one another; forming, through an ion implantation, a high-resistance region in a surface layer of a side surface of each semiconductor device; after the forming of the high-resistance region, forming a p-electrode and a low-melting-point metal diffusion prevention layer on a top surface of the semiconductor device; bonding the semiconductor device to a conductive support substrate via a low-melting-point metal layer comprising at least one selected from a group consisting of Au—Sn, Au—Si, Ag—Sn—Cu, and Sn—Bi; and removing the base through a laser lift-off process, wherein the side surface of the semiconductor device is formed to be inclined so that the device has a cross-sectional area gradually increasing toward the base, and the ion implantation is performed along a direction normal to a main plane of the base.