Patent ID: 6042993
Filing Date: 2000-03-28
Classification: B82Y,G01Q,G03F,Y10S

Abstract:
A process for photolithographic generation of structures in the sub-200 nm range, comprising the steps of: applying a layer of amorphous hydrogen-containing carbon (a-C:H) having an optical energy gap of <1 eV to a substrate as a bottom resist having a layer thickness of .ltoreq.500 nm; applying to the bottom resist a layer of an electron beam-sensitive silicon-containing or silylatable photoresist having a layer thickness of .ltoreq.50 nm as a top resist; exposing the top resist by scanning tunneling microscopy or scanning force microscopy with electrons of an energy of .ltoreq.80 eV to form a pattern after development; transferring the pattern to the bottom resist by etching with an anisotropic oxygen plasma and then to the substrate by plasma etching.