Hitachi Maxell, Limited

Hitachi Maxwell, Ltd.

Hitachi Maxell Energy, Ltd.

Minoru Ichijo

Kunio Wakai

Fumio Kokai

Tsunemi Ohiwa

Tetsuo Mizumura

Seiichi Matsushima

Kiyoshi Sato

Yoshitane Tuburaya

Takashi Kubota

Yoshihisa Hirose

Hiromi Tamakoshi

Ken-ichirou Nakao

Hisanori Sugahara

A button-type alkaline battery in which an anodecontaining an anode active material and an alkaline electrolyte is disposed in a sealed space formed by sealing a cathode housingwith an anode sealing member, with a gasketbeing interposed between the cathode housingand the anode sealing member. The anode active material includes mercury-free zinc or a mercury-free zinc alloy. The button-type alkaline battery includes a metal layerthat is disposed between and in contact with the anode sealing memberand the anode. The metal layerincludes a base material containing zinc, and at least one metal M selected from the group consisting of indium, bismuth, and tin, with the metal M having segregated in the base material.

Button-type alkaline battery and method of manufacturing the same

There is disclosed an optical information recording medium comprising forming at least a recording or reflecting film on one surface of a substrate, wherein an plasma-polymerized film of a halogen-containing resin is formed on at least one of the surface of the substrate or the outer surface of the recording or reflecting film. The medium may further include an additional UV-curing film which is formed on any of the surface of the substrate or plasma-polymerized film of halogen-containing resin on the surface of the substrate, the recording or reflecting film, or the peripheries of the substrate and protective film.

Optical information recording medium and its production

A magnetic recording medium which comprises a substrate, a magnetic layer on the substrate and a protective layer which is formed directly on the magnetic layer or on an undercoat layer formed on the magnetic layer, the protective layer comprising a carbonaceous material essentially consisting of carbon, hydrogen and oxygen, which has improved traveling properties and abrasion resistance.

Magnetic recording medium and production of the same

A magnetic recording medium comprising a substrate, a magnetic layer and a protective layer which consists of an organic polymeric material comprising carbon atoms, hydrogen atoms and oxygen atoms, the content of the oxygen atoms increasing towards the outer surface of the protective layer, which has improved durability and corrosion resistance.

Magnetic recording medium and production thereof

Growing community of inventors

Ibaraki, Japan

Minoru Ichijo