Patent ID: 8372752
Filing Date: 2013-02-12
Classification: B82Y,H01L

Abstract:
1. A method for fabricating an ultra fine nanowire, comprising: a) depositing a silicon nitride film over a silicon substrate; b) coating a photoresist layer onto the silicon nitride film; c) performing a photolithography process to define a region to be used as a mask pattern of a silicon nanowire; d) etching the silicon nitride film to finally transfer a pattern of the photoresist layer onto the silicon nitride film; e) removing the photoresist layer; f) performing a dry anisotropic etching process on the silicon substrate; g) performing a wet oxidation process to slim a size of the silicon nanowire; h) etching the silicon nitride film through a heated concentrated phosphoric acid; i) performing a dry oxidation process on the nanowire to oxidize the silicon nanowire so that the silicon nanowire is suspended; and j) performing a wet etching process on a silicon oxide film to dehydrate a entire chip of the silicon, so as to finally obtain the fine nanowire with a finer width.