Ricoh Company, Ltd.

Kyushu University

Eiko Hibino

Hajime Yuzurihara

Kazunori Ito

Hiroshi Miura

Hiroshi Deguchi

Hiroko Ohkura

Makoto Harigaya

Mikiko Abe

Katsuyuki Yamada

Nobuaki Onagi

Masaru Shinkai

Hiroyoshi Sekiguchi

Masaki Kato

Michiaki Shinotsuka

Yoshiyuki Kageyama

Shinya Narumi

Noriyuki Iwata

Katsuhiko Tani

Michiharu Abe

Takashi Shibaguchi

Miku Mizutani

Satoshi Nakajima

Satoshi Taniguchi

Okitoshi Kimura

Shigeo Takeuchi

Keigo Takauji

Miku Ohkimoto

Tatsumi Ishihara

Hisamitsu Kamezaki

Hiromichi Kuriyama

Takeshi Kibe

Yuki Nakamura

Masahiko Nakayama

Masahiro Masuzawa

Akira Shimofuku

Hideo Yanagita

Mikiko Takada

Hiroyuki Iwasa

Susumu Okada

Toru Ushirogochi

Anna Hirowatari

Yasunori Sugimoto

Hiroko Okura

Katsuyuki; Yamada

Hiroshi; Deguchi

Shinya; Narumi

In accordance with some embodiments of the present invention, an electrode was provided. The electrode includes an electrode composite layer and a porous insulating layer on the electrode composite layer. The electrode composite layer contains an active material. A surface roughness Rz of the electrode composite layer is smaller than an average film thickness of the porous insulating layer.

Electrode, electrode element, electrochemical element, and method for manufacturing electrode

A liquid composition for an electrode composite material is provided. The liquid composition comprises an active material, a dispersion medium, and a polymerizable compound. A viscosity of the liquid composition at 25 degrees C. is a viscosity at which the liquid composition is dischargeable from a liquid discharge head.

Liquid composition for producing electrode composite material, method for producing electrode, and method for producing electrochemical element

To provide a nonaqueous electrolytic storage element, which contains: a positive electrode, which contains a positive electrode material layer including a positive electrode active material capable of reversibly accumulating and releasing anions; a negative electrode, which contains a negative electrode material layer including a negative electrode active material capable of reversibly accumulating and releasing cations; a separator provided between the positive electrode and the negative electrode; and a nonaqueous electrolyte containing an electrolyte salt, wherein a pore volume of the negative electrode material layer per unit area of the negative electrode is larger than a pore volume of the positive electrode material layer per unit area of the positive electrode.

Nonaqueous electrolytic storage element

To provide a nonaqueous electrolytic capacitor element, which contains: a positive electrode containing a positive electrode active material capable of intercalating or deintercalating anions; a negative electrode containing a negative electrode active material; and a nonaqueous electrolyte, which contains a nonaqueous solvent, an electrolyte salt containing a halogen atom, and a compound having a site capable of bonding to an anion containing a halogen atom.

Nonaqueous electrolytic capacitor element

To provide a non-aqueous electrolyte storage element, including: a positive electrode which includes a positive-electrode active material capable of intercalating or deintercalating anions; a negative electrode which includes a negative-electrode active material capable of storing or releasing metallic lithium or lithium ion, or both thereof; a first separator between the positive electrode and the negative electrode; and a non-aqueous electrolyte which includes a non-aqueous solvent and a lithium salt dissolved in the non-aqueous solvent, wherein the non-aqueous electrolyte storage element includes a solid lithium salt at 25&#xb0; C. and a discharge voltage of 4.0 V, wherein the non-aqueous electrolyte storage element includes an ion-exchange membrane between the first separator and the positive electrode, between the first separator and the negative electrode, or between the first separator and the positive electrode and between the first separator and the negative electrode.

Non-aqueous electrolyte storage element

A multilayer optical recording medium including at least multiple information layers each having at least a phase change recording layer capable of recording information by laser irradiation and a reflection layer, wherein each information layer other than the innermost information layer as seen from a side of the laser irradiation has at least a lower protection layer, the phase change recording layer, an upper protection layer, the reflection layer and an optical transmission layer, the upper protection layer and the optical transmission layer in each information layer other than the innermost information layer as seen from the side of the laser irradiation are composed of an Sn oxide-containing material and a thickness of the upper protection layer in each information layer other than the innermost information layer as seen from the side of the laser irradiation is 2 nm to 15 nm is provided.

Multilayer optical recording medium and optical recording method

An optical recording medium having first protective layer, recording layer, second protective layer, and reflective layer, wherein the recording layer contains a phase-change material represented by Formula (1&#x2033;1), Formula (1-2), or Formula (1-3); the second protective layer contains one selected from zinc oxides, indium oxides, tin oxides, mixtures thereof, and materials Formula (2), and materials Formula (3). Formula (1&#x2033;1): InSbX1(X1: Ge, Te, Zn, Mn, or mixture thereof, 0.10&#x2266;&#x3b1;1&#x2266;0.25, 0.65&#x2266;&#x3b2;1&#x2266;0.80, and 0.04&#x2266;&#x3b3;1&#x2266;0.15) Formula (1-2): GaSbSnGeX2(X2: Te, Zn, Mn, In, or mixture thereof, 0.04&#x2266;&#x3b1;2&#x2266;0.09, 0.56&#x2266;62&#x2266;0.79, 0.05&#x2266;&#x3b3;2&#x3c;0.30, 0.03&#x2266;&#x3b4;2&#x2266;0.19, and 0&#x2266;&#x2208;2&#x2266;0.09) Formula (1-3): MnSbSnGeX3(X3: Te, In, Zn, Bi, or mixture thereof, 0.04&#x2266;&#x3b1;3&#x2266;0.09, 0.56&#x2266;63&#x2266;0.79, 0.05&#x2266;&#x3b3;3&#x2266;0.29, 0.03&#x2266;&#x3b4;3&#x2266;0.23, and 0&#x2266;&#x2208;3&#x2266;0.09) Formula (2): ZnO&#x2014;Al&#x2014;Y [(100&#x2212;&#x3b1;4&#x2212;64):&#x3b1;4:&#x3b2;4] (Y: Mn, Ge, Ti, or mixture thereof, 0.5&#x2266;&#x3b1;4&#x2266;10.0, and 0&#x2266;B4&#x2266;25.0) Formula (3): ZnO&#x2014;AlO&#x2014;Z [(100&#x2212;&#x3b1;5&#x2212;65):&#x3b1;5:&#x3b2;5] (Z: Mn oxide, Ge oxide, Ti oxide, or mixture thereof, 0.5&#x2266;&#x3b1;5&#x2266;10.0, and 0&#x2266;65&#x2266;30.0).

Optical recording medium

To provide an optical recording medium in which error-causing short marks are produced in numbers small enough excellent high-recording characteristics and in which amorphous marks are uniform in shape. The optical recording medium includes: a first protective layer; a recording layer containing Sb as a main ingredient; a second protective layer; and a reflective layer, the first protective layer, the recording layer, the second protective layer and the reflective layer being provided in the order in which light passes through the medium for recording and reproduction of information, wherein the first protective layer and/or the second protective layer, both of which are in contact with the recording layer, are/is formed of a crystalline oxide.

A dual-layer structure phase-change type optical recording medium includes a substrate (), a reflective layer (), a first protective layer (), a first recording layer (), a second protective layer (), a resin intermediate layer (), a third protective layer (), a heat release layer () made of Cu or a Cu alloy, a fourth protective layer (), a second recording layer (), a fifth protective layer () and a cover substrate (). A product of a reflectance of a high-reflection part and a modulation after recording is a value equal to or higher than a lower limit value for reproduction.

Phase-change type optical recording medium and reproduction method and apparatus for such a recording medium

A method of recording information using a laser on a multilayer optical disk having a plurality of recording layers is provided. The plurality of recording layers include a first recording layer and a second recording layer adjacent the first recording layer. The first recording layer is provided with a first test writing area to be used for calibration of write power, and the second recording layer is provided with a second test writing area to be used for calibration of write power. The disk is arranged so that a first region of the first test writing area is superposed with a second region of the second test writing area when considered in the direction in which the laser is arranged to irradiate. The method comprises, if the second region of the second test writing area is unrecorded, recording data in the second region of the second test writing area, thereby converting the second region of the second test writing area into a recorded state; and once the second region of the second test writing area has been converted into a recorded state, performing test writing in the first region of the first test writing area.

Optical disk, recording method, recording medium, and optical disk unit, for recording information on multilayer optical disk

A power determining method is disclosed for determining the light emitting power of a light source upon recording information on an optical disk having plural rewritable recording layers, the method involving obtaining an optimum erasing power with respect to an optimum recording power by recording test data on the optical disk.

Power determining method, single-sided multilayer optical disk, recording method, computer program product, computer-readable medium, and optical disk apparatus

The present invention relates to an recording method for a multi-layered optical recording medium including M phase change recording layers, with M&#x2267;2. The method comprises recording a mark in a Kth one of said recording layers by using a laser to irradiate the Kth recording layer using a recording pulse train including a plurality of laser beam pulses. The recording pulse train for the Kth recording layer has a cycle of t[T], the 1st recording layer is the recording layer closest the laser beam, and the Mth recording layer is the recording layer furthest from the laser beam, T is a clock cycle. The following relationship is satisfied: t&#x3c;t, and the cycle of recording pulse train does not decrease from one recording layer to the next recording layer in the direction in which the laser beam irradiates.

Optical recording medium, multi-layered optical recording medium, and optical recording method and recording apparatus using the same

The phase-change optical recording medium having a substrate, and at least a first protective layer, a recording layer composed of a phase-change material, a second protective layer and a reflective layer disposed on the substrate in this sequence has a maximum recording linear velocity Vof 20 m/s to 60 m/s, a range of linear velocity recordable even when the recording linear velocity is continuously changed of 0.3Vto 1.0V, and no occurrence of crystals causing a reproduction error in recorded marks.

Phase-change optical recording medium and recording and reproducing method thereof

An optical disc having a transition linear velocity of 8-11 m/s when irradiating continuous light with 11&#xb1;1 mW and a wavelength of 660&#xb1;10 nm using a pickup head with a numerical aperture (NA) of 0.65, and satisfying the following condition:&#x394;|&#x2266;3%where Rb is a reflectance of an unrecorded area, and Ra is a reflectance of the top of an eye pattern after ten cycles of recording. In one recording mode therefor, the disc is rotated at a constant angular velocity so as to have a linear velocity of 3-4 m/s on an innermost track and a linear velocity of 8-9 m/s on an outermost track. In another mode, the disc is rotated at a constant angular velocity so as to have a linear velocity of 5-6 m/s on an innermost track and a linear velocity of 13-14 m/s on an outermost track.

The object is to provide an optical recording method improving the recording characteristics and uniformity in a CAV recording on a phase-change optical recording medium, particularly a high-speed rewritable DVD medium, and a phase-change optical recording medium and an optical recording apparatus used by the method. Regarding a recording method for recording on the phase-change optical recording medium where a recording light comprises a pulse string of heating and cooling pulses, and a light for erasing, an irradiation power is controlled by peak power (Pp), bottom power (Pb) and erase power (Pe), at least any one of Pe/Pp, Pp, Pb and Pe is variable from the minimum to maximum recording linear velocities allowed for the medium, and further the irradiation time of each pulse is varied proportionally with clock T corresponding to a recording linear velocity, the present invention provides an optical recording method which performs a recording by varying at least Pe/Pp from a specific recording linear velocity lower than a peculiar recording linear velocity at which the recording linear velocity degrades abruptly showing a local maximum value, and an optical recording medium and an optical recording apparatus used by the method.

Optical recording method of a phase-change optical recording medium having improved recording characteristics and uniformity and optical recording medium and optical recorder used by the method

Growing community of inventors

Kanagawa, Japan

Eiko Hibino