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US08962224B2 Methods for controlling defects for extreme ultraviolet lithography (EUVL) photomask substrate 有权
用于控制极紫外光刻(EUVL)光掩模基板的缺陷的方法

Methods for controlling defects for extreme ultraviolet lithography (EUVL) photomask substrate
Abstract:
Methods for providing a silicon layer on a photomask substrate surface with minimum defeats for fabricating film stack thereon for EUVL applications are provided. In one embodiment, a method for forming a silicon layer on a photomask substrate includes performing an oxidation process to form a silicon oxide layer on a surface of a first substrate wherein the first substrate comprises a crystalline silicon material, performing an ion implantation process to define a cleavage plane in the first substrate, and bonding the silicon oxide layer to a surface of a second substrate, wherein the second substrate is a quartz photomask.
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