Patent ID: 7427371

Claim:
An antiglare film producing method of film production by surface embossing to polymer film, in which said polymer film includes a support and an anti-reflection layer overlaid thereon, in which an embosser is used for surface embossing to a surface of said anti-reflection layer or a back surface of said support, said antiglare film producing method comprising: producing said embosser according to electrically negative electrodischarge machining in which liquid with kerosene is used, wherein said liquid includes particles having an average grain diameter equal to or more than 1 micron and equal to or less than 10 microns at an amount equal to or more than 1 gram per liter and equal to or less than 20 grams per liter; wherein a surface of said embosser has an arithmetic average roughness Ra equal to or more than 0.3 micron and equal to or less than 1.0 micron, and has a protruding and retreating pattern with an average cycle length RSm equal to or more than 5 microns and equal to or less than 30 microns; and wherein said polymer film has a hardcoat layer having a thickness in the range of 0.05 to 5 microns.