Patent ID: 6083648
Filing Date: 2000-07-04
Classification: G03F

Abstract:
A reticle for charged-particle-beam microlithography of a pattern, defined by the reticle, onto a sensitive substrate, the reticle comprising:(a) a reticle membrane having first and second opposing major surfaces;(b) a first set of parallel struts extending at a first pitch in a first direction and a second set of parallel struts extending at a second pitch in a second direction perpendicular to the first direction and intersecting the first set of struts, the first pitch being lower than the second pitch and the struts being attached to the first major surface of the membrane and partitioning the membrane into multiple rectangular fields each comprising a respective portion of the membrane extending between respective intersecting struts, each field having a width and defining features of a respective portion of the pattern; and(c) the second struts being flanked by boundary regions on the membrane, the boundary regions each having a width larger than 1/5 of the width of the respective field.