Method for manufacturing light-absorbing substrate and method for manufacturing mold for making same
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United States of America Patent
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Aug 18, 2015
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Jul 19, 2011
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Jul 26, 2010
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Abstract
A method for manufacturing a light-absorbing substrate having a surface with depressions and projections comprises a first step of irradiating a substrate with a laser light so as to form a plurality of modified regions arranged two-dimensionally along a surface of the substrate within the substrate and cause at least one of each modified region and a fracture generated from the modified region to reach the surface of the substrate and a second step of etching the surface of the substrate after the first step so as to form depressions and projections on the surface of the substrate.
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