A simple, cost-effective stamping or molding in the nanometer range is enabled using a stamping surface or molding face with a surface layer having hollow chambers that have been formed by anodic oxidation.

Stamping tool, casting mold and methods for structuring a surface of a work piece

An antireflection film of the present invention includes a plurality of first raised portions, each of which has a two-dimensional size of not less than 1 μm and less than 100 μm when seen in a direction normal to the film, and a plurality of second raised portions, each of which has a two-dimensional size of not less than 10 nm and less than 500 nm when seen in a direction normal to the film. In at least one embodiment, the antireflection film has a first surface shape or a second surface shape that is inverse to the first surface shape relative to a film surface. In the first surface shape, the second raised portions are provided on the first raised portions and between the plurality of first raised portions, and the elevation angle α of a surface of the first raised portions relative to the film surface is about 90° or more. The antireflection film of the present invention has a more excellent antiglare function than conventional ones.

Antireflection film, optical element comprising antireflection film, stamper, process for producing stamper, and process for producing antireflection film

In this method for producing an anti-reflective film, pores are formed on a surface of a polymer molding material to continuously change a refractive index and then reduce reflectance, in which anodic oxidized porous alumina, in which pores having a tapered shape and whose pore diameter continuously changes, are formed by repeating anodic oxidation at about the same formation voltage and pore diameter enlargement treatment, is used as a mold, or a stamper, which is produced by using the anodic oxidized porous aluminum as a mold, is used as a mold.

Anti-reflective film and production method thereof, and stamper for producing anti-reflective film and production method thereof

The invention provides a method for fabricating a nano-array comprising the following steps. A template with a plurality of nano-holes is provided. A polymer is embossed by the template to integrally form a plurality of nano-protrusions thereon, and demolding to reveal the nano-protrusions. The nano-protrusion has a concave or convex top surface.

Nano-array and fabrication method thereof

PROBLEM TO BE SOLVED: To produce anodically oxidized porous alumina having a pore period of ≤35 nm. SOLUTION: The regular structure of a casting mold having an oxide layer removed of a bare metal Al layer after once being subjected to anodic oxidation or the geometric structure identical to the same is transferred to another Al substrate by the casting mold and is subjected to anodic oxidation with the transferred part as a hole generation point, by which the anodically oxidized porous alumina having the pore period corresponding to half an original pore period is formed or the regular structure of the casting mold having the Al bare metal removed with the oxide layer after once being subjected to the anodic oxidation or the geometric structure identical to the same is transferred to another Al substrate by the casting mold described above and is subjected to the anodic oxidation with the transferred part as the hole generation point, by which the anodically oxidized porous alumina having the pore period corresponding to 1/√3 of the original pore period is formed. COPYRIGHT: (C)2002,JPO

Anodically oxidized porous alumina and method for manufacturing the same

The invention relates to a stamping tool, to a method for producing the same, to a method for structuring a surface of a workpiece and to a use for an anodized surface layer. A surface layer with cavities formed without a model, by anodic oxidation, is used as a die to enable simple, inexpensive stamping in the nanometer range.

Stamping tool, method for structuring a surface of a workpiece and use of an anodized surface layer

Stamping tool (1) has a structured stamping surface (2) with an anodically oxidized surface layer (3) or a covering layer (6) having open hollow chambers (4) produced by anodic oxidation. An Independent claim is also included for a process for the production of the stamping tool. Preferred Features: The hollow chambers have a conical shape. The surface layer or covering layer is made from aluminum oxide, silicon oxide, iron oxide, oxidized steel and/or titanium oxide.

Stamping tool has a structured stamping surface with an anodically oxidized surface layer or a covering layer having open hollow chambers produced by anodic oxidation

PROBLEM TO BE SOLVED: To enable structuring in the nanometer ranges in a simple and cost-effective method. SOLUTION: The stamping tool includes a stamping surface provided with an anodically oxidized covering layer 6 having hollow chambers 4 formed at least on a part of the surface of a support 5 formed from a valve metal, or at least on a part of a surface layer 3 formed from a valve metal and applied to the surface of the support 5, wherein the hollow chambers 4 have openings having an average diameter (D) of 10 to 500 nm, also, the structural width (S) thereof is in the range from 30 to 600 nm, and the surface density of the hollow chambers is partially varied in the stamping surface. COPYRIGHT: (C)2009,JPO&INPIT

Stamping tool and method for structuring surface of workpiece

PROBLEM TO BE SOLVED: To simplify a structure in a nanometer range and to provide cost-effective method. SOLUTION: In a method for production of a stamping tool, the stamping surface of the tool is formed by a process of forming a covering layer 6 having the hollow chambers 4 on the surface layer 3 which is formed of a valve metal provided on the surface of a support 5. The hollow chamber has the openings having the average diameter (D) of 10-500 nm and/or the structure width (S) of 30-600 nm. The process of forming the covering layer includes a step of anodizing at least a part of the surface layer and a step of etching before and after anodization. Finally, the surface layer is completely anodized. COPYRIGHT: (C)2009,JPO&INPIT

Sawitowski Thomas

Papers

Stamping tool, method for structuring a surface of a workpiece and use of an anodized surface layer

Stamping tool has a structured stamping surface with an anodically oxidized surface layer or a covering layer having open hollow chambers produced by anodic oxidation

Stamping tool and method for structuring surface of workpiece

Stamping-tool production method, stamping tool, and reflection-preventive film