Patent ID: 6527966
Filing Date: 2003-03-04
Classification: G03F,H01L

Abstract:
A method of forming a pattern comprising: a first step of forming an anti-reflective coating which is made of organic materials and absorbs energy beams, on an etchable layer which is formed on a substrate for semiconductor; a second step of forming a radiation sensitive material coating on the anti-reflective coating; a third step of exposing the radiation sensitive material coating with energy beam selectively and then removing the exposed or non-exposed areas of the radiation sensitive material coating to form a pattern of the radiation sensitive material coating; and a fourth step of dry-etching the etchable layer using as a mask the pattern of the radiation sensitive material coating to form a pattern composed of the etchable layer,wherein the radiation sensitive material coating is made from a chemically amplified resist comprising (a) a resin which is alkali-insoluble or slightly alkali-soluble and comprises a substituent or substituents capable of being released in the presence of an acid and (b) compounds generating an acid upon exposure to radiation which comprise at least one onium salt and at least one sulfone compound.