A negative pattern is formed to be transparent in the far ultraviolet region including the wavelength 193 nm of an ArF excimer laser and, despite its chemical structure having high dry etching, does not swell and has excellent resolution. An acid-catalyzed reaction is utilized wherein a .gamma.-hydroxy or .delta.-hydroxy carboxylic acid structure is partially or entirely converted to a .gamma.-lactone or .delta.-lactone structure. The negative pattern is developed with an aqueous alkali solution without swelling.
一种负型图案形成在包括ArF准分子激光器波长193nm的远紫外区域中,尽管它的
化学结构具有高干法刻蚀,但不会膨胀,并具有出色的分辨率。利用酸催化反应,其中.gamma.-羟基或.delta.-羟基
羧酸结构部分或全部转化为.gamma.-内酯或.delta.-内酯结构。该负型图案使用
水性碱溶液进行显影而不会膨胀。