Patent ID: 8652893
Filing Date: 2014-02-18
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device, the method comprising: providing a semiconductor substrate, on which an NMOS device is formed; covering said NMOS device with a silicon nitride film having a high ultraviolet light absorption coefficient through a PECVD process, wherein the ultraviolet light absorption coefficient of the silicon nitride film having a high ultraviolet light absorption coefficient is α>500 cm−1 for ultraviolet light with λ<410 nm; treating said silicon nitride film having a high ultraviolet light absorption coefficient by stimulated laser surface anneal to remove hydrogen from said silicon nitride film having a high ultraviolet light absorption coefficient; said silicon nitride film having a high ultraviolet light absorption coefficient that has been subject to the stimulated laser surface anneal treatment having a tensile stress greater than 1 GPa to increase channel carrier mobility of the NMOS device.