Hitachi, Ltd.

Other

Hitachi Construction Machinery Co., Ltd.

Riken Corporation

Hitachi Construction Machinery

Sumio Hosaka

Shigeyuki Hosoki

Motoyasu Terao

Hiroki Yamamoto

Ken Takahashi

Fumiyoshi Kirino

Eiji Koyama

Akihiro Takanashi

Yoshio Kawamura

Toshiei Kurosaki

Shinji Kuniyoshi

Hajime Koyanagi

Hiroki Kuramoto

Keiji Takata

Tsuyoshi Hasegawa

Tsuneo Terasawa

Nobuyuki Inaba

Takashi Naitou

Takashi Naito

Toshimichi Shintani

Yukio Honda

Ryo Imura

Tatsuo Harada

Fumio Isshiki

Atsushi Kikukawa

Takeshi Shimano

Kenchi Ito

Atsushi Kikugawa

Kimitoshi Etoh

Takashi Namekawa

Tetsuo Nakazawa

Toshiyuki Aida

Masakazu Sugaya

Kimio Nakamura

Masakazu Ichikawa

Masahiro Yamaoka

Tatsundo Suzuki

Hiromichi Shimizu

Sachiko Okuzaki

Shunji Maeda

Tadashi Ikeda

Takuya Matsumoto

Hitoshi Kubota

Yoshinori Nakayama

Shigeo Moriyama

Akira Shimase

Mikio Ichihashi

Hiroshi Takeuchi

Hifumi Tamura

Satoru Fukuhara

Masahide Okumura

Masatoshi Ohtake

Eiichi Hazaki

Osamu Yamada

Masaru Muranishi

Fumikazu Itoh

Satoshi Haraichi

Masakazu Aono

Takafumi Morimoto

Akira Hashimoto

Tomonobu Nakayama

Ken Murayama

Tsutomu Komoda

Hiroshi Tooyama

Youji Maruyama

Yasushi Nakaizumi

Hironobu Matsui

Masamoto Akeyama

Yoshimasa Kondo

Shiji Okazaki

Kiyosi Nagasawa

Seiya Hashimoto

Yataro Kondo

Keiji Takada

Toshiyuki Morimura

Hitoshi Kondou

A digital probing type atomic force microscope (AFM) for measuring high aspect structures with high precision. A probeis vibrated while moved to the vicinity of an atomic force region on a specimen surface. The position of the probe is measured when a specified atomic force is detected in the atomic force region. The probe is then moved away from the specimen surface. A servo system for maintaining a gap between the probe and specimen surface is stopped. The probe is moved to a measurement point along the specimen surface while kept away from the specimen. The vibration frequency is a frequency slightly offset from the cantilever resonance point. The atomic force is detected based on the vibration amplitude of the cantilever.

Scanning probe microscope and specimen surface structure measuring method

An information recording medium capable of high-density recording and accurate reproduction and also capable of repeated recording and reproduction, an information recording device that employs the information recording medium has a Co&#x2014;Si oxide thin filmconstructed such that columnar crystalsare separated by an intergranular phasewhich contains SiOhaving a lower coefficient of thermal conductivity than the columnar crystals. Therefore, the intergranular phaseprevents heat transfer from one columnar crystalto another. In addition, the intergranular phaseseparates columnar crystalsfrom each other, so that the crystalline structure of each columnar crystalis not affected by its adjacent columnar crystal. The advantage of such construction is that the columnar crystalsdo not undergo phase transformation except for those which were given energy necessary for phase transformation directly from the laser beam, and hence columnar crystalsoverheated by the laser beam do not affect their adjacent columnar crystals. Thus it is possible to accurately form recording pits whose mark length is smaller than the laser beam diameter.

Information recording medium and information recording device

The object of the present invention is to provide an optically functional element having a large change in refractive index with temperature change and a fast change rate in refractive index, a production method for the same and optical switch, temperature sensor and optical information recording medium using the same. The present invention provides a thin film formed directly on a substrate or via other layers, and the film is composed of particles with an average diameter of not larger than 13 nm, observed at film surface. The present invention also provides an optically functional element having an amount of change in refractive index of not less than 2.0&#xd7;10/&#xb0; C. The present invention further provides a production method for said thin film by sputtering under reduced pressure in an inert gas atmosphere containing 3-15% by volume of oxygen, and optical switch, temperature sensor and optical information recording medium using said element.

Optically functional element and production method and application therefor

An absolute accuracy in the range from &#xb1;2 nm to &#xb1;1 nm for a displacement measurement value is provided by a laser interferometer displacement measuring system. A fluctuating error component that appears corresponding to the wave cycle of laser light is detected and subtracted from the measurement value while a stage is moving, thereby providing a high accuracy.

Laser interferometer displacement measuring system, exposure apparatus, and electron beam lithography apparatus

A near-field probe includes a metallic scatterer fabricated on a substrate in a contour of a circular cone, a polygonal pyramid, a planar ellipse, or a triangle and a film of a metal, a dielectric, or a semiconductor formed in a periphery of the scatterer with film thickness equal to height of the scatterer.

Near-field optical probe, near-field optical microscope and optical recording/reproducing device with near-field optical probe

An ultra-high density information recording media has an inorganic compound layer on a substrate , and in the inorganic compound layer , an oxide of at least one kind selected from silicon oxide, aluminum oxide, titanium oxide, tantalum oxide, and zinc oxide exists in an amorphous state at a grain boundary of crystal grain of an oxide of at least one kind selected from cobalt oxide, iron oxide, and nickel oxide. The media has a magnetic layer made of an artificial lattice multilayer obtained by alternately laminating a Co layer or an alloy layer consisting of Co as a main phase and a metal element layer of at least one kind selected from Pt and Pd onto the layer . Thus, a distribution of magnetic properties serving as a pinning site of the movement of a magnetic wall in case of recording information to the magnetic layer is formed in the magnetic layer

Information recording media and information recording drive

The magnetic recording medium includes an underlayer formed of an inorganic compound layer, and a magnetic layer formed over the underlayer . The inorganic compound layer as the underlayer has crystal grains and at least one kind of oxide, the crystal grains having as main elements at least one of cobalt oxide, chromium oxide, iron oxide and nickel, the at least one kind of oxide lying as a non-crystalline phase in grain boundaries between the crystal grains and selected from among silicon oxide, aluminum oxide, titanium oxide, tantalum oxide and zinc oxide.

Magnetic recording disk

An information recording medium capable of high-density recording and accurate reproduction and also capable of repeated recording and reproduction, an information recording device that employs the information recording medium has a Co&mdash;Si oxide thin film constructed such that columnar crystals are separated by an intergranular phase which contains SiO having a lower coefficient of thermal conductivity than the columnar crystals . Therefore, the intergranular phase prevents heat transfer from one columnar crystal to another. In addition, the intergranular phase separates columnar crystals from each other, so that the crystalline structure of each columnar crystal is not affected by its adjacent columnar crystal . The advantage of such construction is that the columnar crystals do not undergo phase transformation except for those which were given energy necessary for phase transformation directly from the laser beam, and hence columnar crystals overheated by the laser beam do not affect their adjacent columnar crystals. Thus it is possible to accurately form recording pits whose mark length is smaller than the laser beam diameter.

Information recording medium with recording film with cobalt oxide crystalline particles, and information recording device including the same

An absolute accuracy in the range from &plusmn;2 nm to &plusmn;1 nm for a displacement measurement value is provided by a laser interferometer displacement measuring system. A fluctuating error component that appears corresponding to the wave cycle of laser light is detected and subtracted from the measurement value while a stage is moving, thereby providing a high accuracy.

A magneto-optical storage apparatus including an ultra-high density information recording media having an inorganic compound layer on a substrate and in the inorganic compound layer an oxide of at least one kind selected from silicon oxide, aluminum oxide, titanium oxide, tantalum oxide, and zinc oxide exists in an amorphous state at a grain boundary of crystal grain of an oxide of at least one kind selected from cobalt oxide, iron oxide, and nickel oxide. The media has a magnetic layer made of an artificial lattice multilayer obtained by alternately laminating a Co layer or an alloy layer consisting of Co as a main phase and a metal element layer of at least one kind selected from Pt and Pd onto the layer Thus, a distribution of magnetic properties serving as a pinning site of the movement of a magnetic wall in case of recording information to the magnetic layer is formed in the magnetic layer

The magnetic recording medium includes an underlayer formed of an inorganic compound layer, and a magnetic layer formed over the underlayer . The inorganic compound layer as the underlayer has crystal grains and at least one kind of oxide, the crystal grains having as main elements at least one of cobalt oxide, chromium oxide, iron oxide and nickel oxide, the at least one kind of oxide lying as a non-crystalline phase in grain boundaries between the crystal grains and selected from among silicon oxide, aluminum oxide, titanium oxide, tantalum oxide and zinc oxide.

A magnetic recording medium includes a non-magnetic substrate, an inorganic compound layer that is formed on the substrate and which contains a crystalline first oxide and a second oxide, and a magnetic layer that is formed on the inorganic compound layer. The crystalline first oxide comprises at least one oxide selected from cobalt oxide, chromium oxide, iron oxide and nickel oxide. The second oxide comprises at least one oxide selected from silicon oxide, aluminum oxide, titanium oxide, tantalum oxide and zinc oxide. The second oxide is present at a grain boundary of crystal grains of said first oxide. According to the present invention, magnetic recording media low in noise and diminished in thermal fluctuation and thermal decay can be obtained by making fine the crystal grains of a magnetic layer and controlling the dispersion of the grain size. Thus, magnetic recording apparatuses can be realized which can perform an ultrahigh density magnetic recording of higher than 20 Gb/in .

Magnetic recording disk, method of the magnetic recording disk and magnetic recording apparatus

A recording disk has a surface provided with guide grooves for controlling the position of a recording head, and recording bits formed in the guide grooves for high-density recording. The recording bits have the shape of a tadpole in a plane. The width Ws of the recording bits is greater than the width Wg of the guide grooves. An AFM probe serving as a recording head travels along the guide grooves without running off the guide grooves. When a tip part of the AFM probe coincides with the recording bit, the tip part drops deep into the guide groove, whereby the recording bit is detected.

Recording medium and recording device

A pad for controlling the state of contact or flying of a slider with or to an information-recording medium and a probe for exciting near-field light having a small spot size are mounted on the slider and the pad is near to the probe. Semiconductor laser light focused by an objective lens is converted into near-field light having a small spot size near the top of the probe for exciting near-field light. The slider travels at a height of several tens nm to a recording medium substrate and information is recorded or read out on or from the information-recording medium formed on the recording medium substrate.

Near-field optical head and manufacturing method thereof and optical recording/readout system using near-field optical head

Growing community of inventors

Hinode, Japan

Sumio Hosaka