Patent ID: 8211785

Claim:
A fabrication method for a semiconductor device, comprising: forming a gate insulator layer on a semiconductor substrate; forming a gate electrode on the gate insulator layer; doping first impurities of a first conductivity type in source and drain extension regions of the semiconductor substrate, using the gate electrode as a mask; forming sidewall insulator layers on sides of the gate electrode, after doping the first impurities; doping second impurities of the first conductivity type in source and drain regions of the semiconductor substrate, using the gate electrode and the sidewall insulator layers as a mask; and performing a plurality of flash lamp annealing processes after doping the second impurities, wherein an irradiation energy density in a subsequent flash lamp annealing process among the flash lamp annealing processes is higher than an irradiation energy density in a preceding flash lamp annealing process among the flash lamp annealing processes, and the first and second impurities are activated in the flash lamp annealing processes.