Patent ID: 6815363
Filing Date: 2004-11-09
Classification: B81C

Abstract:
A particle-track-guided etching method for nanomachining a precise structure with a high aspect ratio, comprising:irradiating the surface of a wafer with a charged particle beam of suitable energy to form particle tracks in said capable of discrete etching guided by said particle tracks in said wafer with a desired depth and alignment; depositing a layer of pattern forming resist material on the wafer surface irradiated by said particle beam; generating a precise pattern on the pattern forming layer; etching the areas of said wafer that are not covered by the precise pattern; wherein said etching is guided by said particle tracks; wherein said charged particle beam is directed to said surface of said wafer with a predetermined collimation at a desired direction; and wherein the level of said suitable energy exceeds 0.5 MeV.