Patent ID: 7871933
Filing Date: 2011-01-18
Classification: G03F

Abstract:
1. A method of forming structure on a workpiece comprising the steps of: first loading said workpiece into a chamber, said chamber having a controlled atmosphere including a temperature and a pressure; in said controlled atmosphere i) depositing an unpatterned film on a surface of said workpiece, said film formed of a hydrophobic photosensitive material; ii) creating a pattern of apertures through said film by exposing said film to a patterned beam of electrons or photons wherein exposed portions of said film volatilize upon such exposure, said patterned beam defined by passing a first beam of electrons or photons through a patterning unit; iii) depositing structural material within said apertures, then prior to step iv a) depositing a unpatterned second film over said workpiece, said film formed of a hydrophobic photosensitive material; b) creating a pattern of second apertures by exposing said second film to a second patterned beam of electrons or photons wherein exposed portions of said film volatilize upon such exposure, said second patterned beam defined by passing a first beam of electrons or photons through a second patterning unit and c) depositing structural material within said second apertures, and iv) vaporizing remaining portions of said film by flooding said workpiece with said first beam; and after step iv removing said workpiece from said chamber.