Patent ID: 9029211
Filing Date: 2015-05-12
Classification: B82Y,H01J,H01L

Abstract:
1. A method for fabricating a nano field-effect vacuum tube, comprising: providing a semiconductor substrate having an insulating layer and a sacrificial layer; forming a sacrificial line and source/drain sacrificial layers connecting with the sacrificial line; forming a trench in the insulating layer to suspend the sacrificial line; forming a dielectric layer on a surface of the sacrificial line; forming a metal layer on the dielectric layer to fill up the trench, cover the sacrificial line and expose the source/drain sacrificial layers; removing the source/drain sacrificial layers to expose opposite ends of the sacrificial line and the dielectric layer; removing the sacrificial line to form a through channel; forming an isolation layer on the metal layer; and forming a source region and a drain region on the insulating layer at opposite ends of the metal layer to seal the through channel to form the nano field-effect vacuum tube.