Matsushita Electric Industrial Co., Ltd.

Mitsubishi Chemical Corporation

Youji Arita

Hiroyuki Ikeda

Yuzo Seo

Masahiro Kawashima

Tooru Fuse

Masao Miyake

Yukihiro Miyamoto

Takeshi Kuriwada

Tomohiro Satou

Etsuko Miyake, Legal Representative

A negative electrode material for a nonaqueous electrolyte rechargeable battery that can stably and efficiently realize a high-performance nonaqueous electrolyte rechargeable battery in which a high discharge capacity, high charge/discharge efficiency at an initial stage and during charge/discharge cycles, and excellent charge/discharge cycle properties are provided as well as electrode expansion in volume after charge/discharge cycles is suppressed. The negative electrode material for a nonaqueous electrolyte rechargeable battery in the form of particles having, at least on the surface thereof, a compound of the phase in which an element Z is present in Si in a non-equilibrium state. The compound is expressed by the general formula SiZM, where Z represents C and/or N, M represents an element other than C and N, and when the concentration of the element Z in a compound SiZ, where each of a and p is an integer, having a composition closest to that of Si and present in an equilibrium state is presumed to be 100 atomic percent, the concentration of the element Z in the compound SiZMis in the range of 10 to 95 atomic percent, and y is in the range of 0 to 0.5.

Nonaqueous electrolyte rechargeable battery, and negative electrode and material thereof

A method for forming a magnetic pattern in a magnetic recording medium, which includes irradiating energy beams to a magnetic recording medium having a magnetic layer on a substrate via a photomask having a transmitting portion and a nontransmitting portion to heat locally an irradiated portion of the magnetic layer. The method also includes applying an external magnetic field to the magnetic layer. The transmitting portion and the non-transmitting portion of the photomask each has a reflectivity of energy beam of 30% or less in at least one surface facing the magnetic recording medium. By using techniques of heating a local portion and applying an external magnetic field in combination, a fine magnetic pattern can be effectively and accurately formed while the production of an interference fringe is suppressed.

Method for forming a magnetic pattern in a magnetic recording medium, magnetic recording medium magnetic recording device and photomask

Method for forming a magnetic pattern in a magnetic recording medium, a magnetic pattern forming device, a magnetic recording medium and a magnetic recording device

A method and device for forming a magnetic pattern in a magnetic recording medium, a magnetic recording medium formed thereby and a magnetic recording device that includes a magnetic recording medium formed by this method and/or device. The magnetic recording medium has a magnetic layer, a protective layer, and a lubricant layer formed on a substrate in this order, and the magnetic pattern is formed by locally heating the magnetic layer and applying an external magnetic field to the magnetic layer.

METHOD FOR FORMING A MAGNETIC PATTERN IN A MAGNETIC RECORDING MEDIUM, METHOD FOR PRODUCING A MAGNETIC RECORDING MEDIUM, MAGNETIC PATTERN FORMING DEVICE, MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING DEVICE

Growing community of inventors

Kanagawa, Japan

Youji Arita