Patent ID: 8815680
Filing Date: 2014-08-26
Classification: H01L

Abstract:
1. A method for making a non-volatile memory device, the method comprising: providing a semiconductor substrate including a surface region; forming a tunnel dielectric layer overlying the surface region; forming a source region within a first portion of the semiconductor substrate; forming a drain region within a second portion of the semiconductor substrate; depositing a first nanocrystalline silicon structure overlying a first portion between the source region and the drain region to form a first floating gate structure; depositing a second nanocrystalline silicon structure overlying a second portion between the source region and the drain region to form a second floating gate structure, while maintaining separation from the first nanocrystalline silicon structure; sputtering the deposited first and second nanocrystalline silicon structures to form a pointed top portion and a broad bottom portion; forming a second dielectric layer overlying the first floating gate structure and the second floating gate structure; and forming a control gate structure overlying the first floating gate structure and the second floating gate structure.