Patent ID: 9722044
Date: 2017-08-01
CPC Classifications: H01L

Claim:
1. A manufacturing method of a semiconductor device comprising the steps of: (a) preparing a substrate having a semiconductor substrate, an insulating layer formed on the semiconductor substrate, and a semiconductor layer formed on the insulating layer; (b) forming a semiconductor region by ion-implanting an n type impurity or a p type impurity into the semiconductor substrate such that an impurity concentration profile of the p type or n type impurity extends from the semiconductor region through the insulating layer and into the semiconductor layer, the impurity concentration profile having a maximum in the semiconductor region, the semiconductor region being below the insulating layer; (c) ion-implanting carbon into the semiconductor layer such that the p type or n type impurity in the semiconductor layer is inactivated by the carbon in the semiconductor layer; and (d) after the steps (b) and (c), forming a field effect transistor on a main surface of the semiconductor layer.