Patent ID: 7482235
Filing Date: 2009-01-27
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising the steps of: (1) providing an impurity diffusion structure and an element isolation region in a semiconductor silicon substrate; (2) providing gate wiring on the semiconductor silicon substrate; and (3) growing a semiconductor crystal to protrude in contact with a side wall of the gate wiring on the semiconductor silicon substrate by a selective epitaxial growth method, so that said semiconductor crystal is wider at a center portion than at both top and bottom portions, wherein the step of growing the semiconductor crystal to protrude is performed on at least one condition selected from the group consisting of temperature conditions with two or more levels and pressure conditions with two or more levels, and wherein at least one condition selected from the group consisting of temperature conditions with two or more levels and pressure conditions with two or more levels is at least one selected from the group consisting of following (a) to (c): (a) under a pressure with a constant value in the range of 1 to 100 Torr, a first temperature condition ranges from 830 to 900° C., and a second temperature condition ranges from 780 to 820° C.; (b) under a temperature with a constant value in the range of 780 to 900° C., a first pressure condition ranges from 1 to 10 Torr, and a second pressure condition ranges from 20 to 100 Torr; and (c) first conditions of temperature and pressure are respectively in the range of 830 to 900° C. and in the range of 1 to 10 Torr, and second conditions of temperature and pressure are respectively in the range of 780 to 820° C. and in the range of 20 to 100 Torr.