Patent ID: 9093316
Filing Date: 2015-07-28
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, the method comprising the steps of: forming a gate electrode on a silicon layer of an SOI substrate, in which the silicon layer is formed on a first support substrate through an insulating layer, through a gate insulating film, and forming diffusion layers in the silicon layer on both sides of the gate electrode so as to form a transistor; forming low-resistance parts having resistance lower than the diffusion layers at the front surfaces of the diffusion layers; forming a second support substrate on the silicon layer through an insulating film covering the transistor and removing the first support substrate and the insulating layer; and forming an insulating interlayer on the silicon layer and forming rear contact electrodes in the insulating interlayer and the silicon layer to be connected to the low-resistance parts; after the gate electrode is formed and before the diffusion layers are formed, forming sidewalls at the sidewalls of the gate electrode; forming a first insulating film so as to cover the gate electrode and the sidewalls; exposing the upper parts of the sidewalls; removing the sidewalls so as to form spaces between the gate electrode and the first insulating film; forming a second insulating film on the first insulating film while leaving the spaces such that the first insulating film and the second insulating film form the insulating film.