Patent ID: 6316150
Filing Date: 2001-11-13
Classification: B82Y,G03F

Abstract:
A reflective reticle for extreme ultraviolet lithography comprising:a substrate having an active region on a first surface of the substrate wherein the active region comprises (1) a radiation reflective material that is coated on the first surface of the substrate and (2) a pattern comprising a radiation absorbing material formed on the radiation reflective material wherein the pattern of radiation absorbing material partially covers the radiation reflective material wherein the active region defines an outer perimeter situated within the substrate perimeter; andat least one non-active region on a second surface of the substrate wherein the at least one non-active region is characterized by having a surface that is formed of material that has an emissivity that is higher than that of the radiation reflective material of the active region surface wherein the at least one non-active region is positioned along the outer perimeter of the active region and wherein the at least one non-active region has a collective surface area that is at least 25% of the collective surface area of the first and second surfaces of the substrate.