Ricoh Company, Ltd.

Kyushu University

Hisamitsu Kamezaki

Yoshitaka Hayashi

Nobuaki Onagi

Eiko Hibino

Noboru Sasa

Toshishige Fujii

Atsuyuki Watada

Okitoshi Kimura

Kawori Tanaka

Hirotaka Komoda

Tsutomu Sato

Hiroshi Miura

Tatsuya Tomura

Takeshi Miki

Mikiko Takada

Yasuo Sawada

Tatsumi Ishihara

Ippei Ogawa

Yasuhide Fujiwara

Anna Hirowatari

Yasunori Sugimoto

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

A two-photon absorption material represented by the following General Formula (I): 

Two-photon absorption material and application thereof

An object of the invention is to provide an optical-recording medium in which problems such as cross-write, i.e., signals are recorded wrongly on adjacent tracks, and cross-erase i.e., recording signals on adjacent tracks are erased wrongly, can be solved, and which enables high-density recording; a method for producing the optical-recording medium; and a method for recording and reproducing an optical-recording medium. To achieve this object, the optical-recording medium includes a substrate, an optical-absorption layer which absorbs light and generates heat on or above the substrate, a recording layer, and record-blocking portions which block recording on the recording layer, in which the record-blocking portions are disposed between the recording layer and the optical-absorption layer, and between adjacent tracks, and recording marks are formed on the recording layer by the optical absorption function of the optical-absorption layer.

Optical-recording medium, method for producing the same, and method for recording and reproducing optical-recording

For recording information at high density even at blue-laser wavelengths, a write-once-read-many optical recording medium includes a first inorganic thin film and at least one of a second inorganic thin film and an organic thin film, in which the first inorganic thin film contains at least 'R' and 'O,' wherein &#x201c;R&#x201d; is at least one selected from Y, Bi, In, Mo, V and lanthanum series elements; and &#x201c;O&#x201d; is oxygen atom, and the second inorganic thin film and the organic thin film are capable of suppressing at least one of deformation and breakage of the first inorganic thin film and receiving the change of state of the first inorganic thin film.

Write-once-read-many optical recording media and process for recording and reproducing information on the media

An information recording medium includes a transparent substrate and a recording layer or a metal layer provided on the transparent substrate directly or via a ground layer. The information recording medium has a RAM area on which information is recorded, reproduced or erased, and a ROM area from which only reproduction is made, and an average thickness of the recording layer of said RAM area is larger than that of the recording layer or metal layer of the ROM area.

Information recording medium and manufacturing method thereof

An information recording medium including a transparent substrate, and a recording layer or a metallic layer formed on the transparent substrate directly or through an undercoat layer, with an amplitude attenuation time of 1 second or less and/or a vibration frequency attenuation time of 3 seconds or less, when vibrated in the direction perpendicular to the flat surface of said information recording medium, or wherein when the information recording medium is in-plane vibrated in the direction perpendicular to the extending direction of information recording, reproducing and/or deleting tracks, a maximum in-plane deviation of a recording, reproducing or deleting position in the tracks in the perpendicular direction from a correct recording, reproducing or deleting position in the tracks is 12.5&#xd7;d or less wherein d is an average distance between the adjoining tracks measured in the direction perpendicular to the extending direction of the tracks, and an acceleration of the information recording medium in the perpendicular direction is 0.25 m/sor less.

Information recording medium

Growing community of inventors

Kanagawa, Japan

Hisamitsu Kamezaki