Patent ID: 6251549
Filing Date: 2001-06-26
Classification: G03F

Abstract:
A device, comprising;a large plurality of features formed by a strong phase shift photolithography step using a wavelength of light .lambda. shorter than 250 nm, the features corresponding to unexposed photoresist on at least one masking level, the features forming one or more ordered arrays over substantially an entire surface of the device, said ordered arrays being defined by a constant minimum displacement in one dimension .delta. larger than .lambda./3, where the displacement from one device feature to the next is an integral multiple of .delta., wherein the features are determined by lines of unexposed photoresist having exposed photoresist on each side of the line, where the lines of unexposed photoresist have width less than .lambda. and length greater than .lambda., and wherein at least some of the lines of unexposed photoresist are connected at one or both ends with an area of unexposed photoresist, wherein the areas of unexposed photoresist have length and width greater than the width of the lines of unexposed photoresist, wherein the lines of unexposed photoresist and the connected areas of unexposed photoresist are surrounded by exposed photoresist.