Nippon Steel Sumitomo Metal Corporation

Sumitomo Metal Industries, Inc.

Futoshi Katsuki

Kazutaka Asabe

Kunihiro Fukui

Hayato Kita

Atsuhiko Kuroda

Osamu Kanda

Disclosed are a titanium material having excellent surface characteristics and a method for readily producing a titanium material having excellent surface characteristics. More specifically, provided is a titanium material including a surface film having a multilayer structure provided with at least two layers, namely a surface layer and an inner layer in contact with the inner side of the surface layer, wherein the surface layer is formed of titanium oxide with a hardness of 5 GPa to 20 GPa, and the inner layer contains at least one of titanium carbide and titanium nitride.

Titanium material and method for producing titanium material

A preparing method for a substrate for a stamper where the entirety of the metal rolled plate can be used as the material for the substrate so that a high yield in the preparation can be maintained is provided. A metal is rolled so as to generate a metal rolled plate, the metal rolled plate that is generated is cut to a predetermined size, and metal plating is operated on the front surface or the rear surface, or both the front and rear surfaces, of the metal rolled plate that has been cut to a predetermined size, and then, a polishing process is operated. A target plate thickness that is set when the metal rolled plate is rolled is smaller than the plate thickness that is required at the time of completion of the polishing process.

Substrate for a stamper

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Osaka, Japan

Futoshi Katsuki