Patent ID: 9136396
Filing Date: 2015-09-15
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, the method comprising: forming devices on a front surface of a substrate, each of the devices including a source electrode, a drain electrode, and a gate electrode, and the substrate including a bulk silicon, a buried oxide layer, an active silicon, a gallium nitride layer, and an aluminum-gallium nitride layer which are sequentially stacked; forming a via-hole penetrating the substrate by etching a back surface of the substrate, the via-hole exposing a bottom surface of the source electrode; conformally forming a ground interconnection on the back surface of the substrate having the via-hole; after forming the via-hole and the ground interconnection, forming a protecting layer on the front surface of the substrate on which the devices are formed; and after forming the protecting layer, cutting the substrate between the devices to separate the devices from each other, wherein the protecting layer is disposed on the front surface of the substrate while the cutting of the substrate.