Patent ID: 8372707
Filing Date: 2013-02-12
Classification: H01L

Abstract:
1. A method of forming non-volatile memory comprising: forming a floating gate stack on a substrate having a source region, a drain region and a channel region, the channel region separates the source region and the drain region, an insulating layer at least partially separates the floating gate stack from the channel region, the floating gate stack comprises a sacrificial layer separating a floating gate electrode from a control gate electrode; removing the sacrificial layer to form a void space at least partially defined by a major surface of the floating gate electrode and a major surface of the control gate electrode, the major surface of the floating gate electrode opposes the major surface of the control gate electrode, and the major surface of the floating gate electrode comprises a carbon based or a tungsten based field emitter and the major surface of the control gate electrode comprises a carbon based or a tungsten based field emitter; creating a vacuum layer in the void space; and sealing the vacuum layer in the void space at least partially between the major surface of the floating gate electrode and the major surface of the control gate electrode, forming a non-volatile memory.