Patent ID: 6815225
Filing Date: 2004-11-09
Classification: H01L

Abstract:
A method for forming a capacitor of a nonvolatile semiconductor memory device, comprising the steps of:forming a TaON glue layer over a semiconductor substrate; forming a lower electrode on the TaON glue layer; forming an SBT or SBTN film for a ferroelectric film on the lower electrode; and forming an upper electrode on the ferroelectric film, wherein the SBT or SBTN film for the ferroelectric film is formed by generating cores according to a rapid thermal process maintaining 80Â° C. to 300Â° C./sec and using O2, N2O or O2+N2 gas as a reaction gas, and by encouraging grain growth according to a furnace thermal treatment maintaining a temperature at 700 to 850Â° C. and using O2, N2O or O2+N2 gas as a reaction gas.