Patent ID: 9589954
Date: 2017-03-07
CPC Classifications: H01L

Claim:
1. A semiconductor device, comprising: a substrate; a first transistor having a gate insulating film and a gate electrode, and having a drain and a source opposed to each other with the gate insulating film in between in a plan view; a first impurity region that is provided in the substrate and is to be one of the drain and the source; a first recess that is provided in the substrate and is located between the gate insulating film and the first impurity region; a first insulating film filled in the first recess; and a second recess provided in the first insulating film on a side close to the gate insulating film, wherein a first angle defined by an inner side face of the first recess and a surface of the substrate is rounded on a side of the first recess close to the gate insulating film.