Patent ID: 7919372
Filing Date: 2011-04-05
Classification: H01L,Y10S

Abstract:
1. A method for manufacturing a semiconductor device having an ONO structure, comprising: providing an oxide-nitride film on a surface of a substrate, the substrate having first and second regions defined by an isolation structure, the oxide-nitride film including a first silicon oxide layer over the substrate and a silicon nitride layer over the first silicon oxide layer; patterning the oxide-nitride film to expose a surface of the substrate in the second region and to define bottom oxide and silicon nitride portions of an ONO stack in the first region of the substrate, the bottom oxide portion and silicon nitride portions having exposed sidewalls and the silicon nitride portion having an exposed surface; and exposing the exposed sidewalls and the exposed surface to a radical oxidizing agent while the substrate is at a temperature in a range about 700° C. to about 1200° C., to form concurrently a second oxide layer on the exposed surface and sidewalls of the patterned silicon nitride portion and a gate oxide layer on the substrate surface in the second region; and forming a conductive layer over the second oxide layer and over the gate oxide layer.