Patent ID: 7846803
Filing Date: 2010-12-07
Classification: H01L

Abstract:
1. A method of forming a doped region, the method comprising: implanting a dopant into a region in a semiconductor substrate, wherein the region comprises source/drain extension and/or source/drain regions that are epitaxially grown with semiconductor material different from and with lower melting temperature than remaining regions of the semiconductor substrate; performing a first anneal in the region using a laser, wherein: performing a second anneal in the region using the laser after performing the first anneal, wherein: performing additional anneals in the region with the laser to improve dopant activation without melting the different material source/drain extension and/or source/drain regions, the additional laser anneals being performed with temperatures and dwell times lower than a melting condition of the different material source/drain extension and/or source/drain regions and improving a corresponding dopant activation to a degree that would otherwise require a temperature and dwell time higher than the melting condition of the different material source/drain extension and/or source/drain regions.