Patent ID: 8664740
Filing Date: 2014-03-04
Classification: H01L

Abstract:
1. A semiconductor device including a gate electrode formed with interposition of a gate insulating film on a channel formed on a semiconductor substrate, and a Schottky source and a Schottky drain that are formed within a top surface of the semiconductor substrate so as to be positioned on both sides of the gate insulating film in such a way that end portions of the Schottky source and the Schottky drain do not cover a lower end portion of the gate insulating film and so as to form Schottky junctions with the semiconductor substrate, wherein the Schottky source and the Schottky drain comprise metal silicide, wherein at the interface between the end portion of the Schottky source and the semiconductor substrate and at the interface between the end portion of the Schottky drain and the semiconductor substrate, a dopant whose polarity is opposite to that inside the channel is segregated more than a dopant whose polarity is the same as that inside the channel, wherein at the interface between the portions except the end portions of the Schottky source and the Schottky drain and the semiconductor substrate, a dopant whose polarity is the same as that inside the channel is segregated more than a dopant whose polarity is opposite to that inside the channel, and whereby the Schottky barrier height at the interfaces between the portions except the end portions of the Schottky source and of the Schottky drain and the semiconductor substrate is larger than the Schottky barrier height at the interface between the end portion of the Schottky source and the semiconductor substrate and than the Schottky barrier height at the interface between the end portion of the Schottky drain and the semiconductor substrate.