Patent ID: 9093508
Filing Date: 2015-07-28
Classification: B82Y,H01J,H01L

Abstract:
1. A nano field-effect vacuum tube, comprising: a semiconductor substrate having an insulating layer; a through channel configured as a vacuum channel region; a dielectric layer surrounding the through channel; a source region and a drain region both sealing the through channel; a metal layer configured as a gate; and an isolation layer isolating the metal layer from the source region and the drain region, wherein: the through channel is formed by sequentially 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 the dielectric layer on a surface of the sacrificial line; forming the 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; and removing the sacrificial line.