Patent ID: 6171765
Filing Date: 2001-01-09
Classification: G03F

Abstract:
A method for patterning a layer, said method comprising the steps of:covering said layer to be patterned with a layer of a photoresist comprising a photoacid generator and a polymer constructed from fragments that are converted to gaseous products when heated to a predetermined temperature, said polymer being stable at said predetermined temperature, said fragments being joined by acid labile links to form said polymer, said polymer being soluble in a solvent that does not contain water or active hydrogen, and said photoacid generator comprising a compound that releases acid when exposed to light said layer to be patterned comprising a material that reacts chemically to water or active hydrogen;exposing regions of said photoresist that overlay regions of said layer to be patterned that are to be removed to light;heating said layer of photoresist to a temperature to remove the exposed regions of said photoresist at or above said predetermined temperature;removing portions of said layer to be patterned in regions not covered by said photoresist; andremoving any remaining photoresist by washing in said solvent.