Patent ID: 6297099
Filing Date: 2001-10-02
Classification: H01L,Y10S

Abstract:
A method of fabricating a floating gate/word line device, comprising the steps:providing a semiconductor structure;forming a floating gate portion over the semiconductor structure; the floating gate portion having side walls and a top surface;forming a poly-oxide portion over the top surface of the floating gate;forming an interpoly oxide layer over the semiconductor structure, the poly-oxide portion and the poly-oxide portion; the interpoly oxide layer having an initial thickness and including:a word line region portion over at least a portion of the semiconductor structure adjacent the floating gate portion;side wall area portions over the floating gate portion side walls; anda top portion over the poly-oxide portion;reducing the initial thickness of the top portion of the interpoly oxide layer to a second thickness without reducing the initial thickness of the interpoly oxide word line region portion or an appreciable portion of the interpoly oxide side wall area portion;forming a polysilicon layer over the interpoly oxide layer; andpatterning the structure to form a floating gate/word line device.