Patent ID: 7795121

Claim:
A method for manufacturing a semiconductor device, comprising: forming a gate insulating film on a semiconductor substrate; forming a first layer on the gate insulating film, the first layer containing In as a first p-type impurity at a concentration of 1×10 21 /cm 3 or more, and an amorphous or polycrystalline formed of Si 1-x Ge x (0≦x<0.25); subjecting the first layer to a first heat treatment wherein the first layer is irradiated with laser having an energy density of 1.5 J/cm 2 or more for 15 nsec or less to laser-anneal the first layer; forming a metal boride layer on the first layer; and subjecting the metal boride layer to a second heat treatment to heat the metal boride layer at a temperature ranging from 800° C. to 1100° C.