Tdk Corporation

Toyota Jidosha Kabushiki Kaisha

Denso Corporation

Pioneer Corporation

Sharp Kabushiki Kaisha Corporation

Mirise Technologies Corporation

Masaki Aoshima

Hiroyasu Inoue

Koji Mishima

Hideki Hirata

Hajime Utsunomiya

Hitoshi Arai

Tetsuya Iida

Yoshitomo Tanaka

Yasuo Hosoda

Hironori Kakiuchi

Masataka Yamaguchi

Ayumi Mitsumori

Megumi Sato

Tetsuro Mizushima

Shigemi Maeda

Jiro Yoshinari

Yoshihisa Adachi

Takanori Kawashima

Isamu Kuribayashi

Atsushi Etoh

Mitsuo Ishii

Makoto Imai

Shohei Nagai

A semiconductor device includes a substrate main body having a first surface and a second surface, an electric component arranged in the substrate main body, a first internal conductor pattern arranged in a first circuit layer located between the first surface and the electric component, and at least one heat absorbing member. The at least one heat absorbing member is arranged inside the substrate main body and thermally connected to the first internal conductor pattern.

Semiconductor device having electric component built in circuit board

A semiconductor device may include a first conductor plate on which a first semiconductor element, a second semiconductor element and a first circuit board are disposed, and a plurality of first signal terminals. A size of the second semiconductor is smaller than a size of the first semiconductor element. In a plan view along a direction perpendicular to the first conductor plate, the plurality of first signal terminals is located in a first direction with respect to the first semiconductor element. The second semiconductor element and the first circuit board are located between the plurality of first signal terminals and the first semiconductor element and are arranged along a second direction that is perpendicular to the first direction. A signal pad of the first semiconductor element is connected to a corresponding one of the plurality of first signal terminals via a signal transmission path of the first circuit board.

Semiconductor device having a conductor plate and semiconductor elements

A semiconductor module includes a semiconductor device, a first conductive member, a second conductive member, a cylinder, and a cover. The first conductive member is in contact with a first electrode of the semiconductor device. The second conductive member is in contact with a second electrode of the semiconductor device. The cylinder encompasses the semiconductor device and is fixed to the first conductive member, and a first thread groove is formed on the cylinder. A second thread groove is formed on the cover. The cover is fixed to the cylinder by an engagement of the second thread groove with the first thread groove. The semiconductor device and the second conductive member are fixed by being sandwiched between the first conductive member and the cover. The second conductive member includes a portion extending from inside to outside the cylinder by penetrating an outer peripheral wall of the cylinder.

Semiconductor module

In an information recording/reproducing device, a resting period (tm) is set to be constant regardless of a mark length of a recording mark and regardless of the number of divided recording pulses. Consequently, it is possible to provide an information recording device, an information recording method, and an information recording medium, each allowing formation of a recording mark with a uniform width by use of a low laser power and allowing reduction of the number of parameters for determining a recording waveform, when forming a long recording mark.

Recording mark formation method, information recording device, information recording method, and information recording medium

An optical recording medium includes a substrate, a first recording layer formed on the substrate and containing an element selected from the group consisting of Si, Ge, C, Sn, Zn and Cu as a primary component, and a second recording layer located in the vicinity of the first recording layer and containing Al as a primary component, the optical recording medium being constituted to be irradiated by a laser beam projected onto the side opposite from the substrate and the total thickness of the first recording layer and the second recording layer being equal to or thinner than 40 nm. According to the thus constituted optical recording medium, it is possible to decrease a noise level and improve a C/N ratio in a reproduced signal.

Optical recording medium and method for optically recording data in the same

An optical information recording medium which makes it possible to reduce the noise level, improve the C/N ratio and store record data for a long time period. An optical information recording medium has a recording layer formed on a substrate, for having a laser beam irradiated thereto for recording and reproduction of record data. The recording layer includes a first sub-recording film and a second sub-recording film. The first sub-recording film is formed of a first material containing Si as the main component. The second sub-recording film is formed of a second material containing Al as the main component and having Au added thereto, and disposed in the vicinity of the first recording film. The laser beam is irradiated to the recording layer via a light transmitting layer formed in a manner covering the recording layer side.

Optical information recording medium

An optical information recording medium which is capable of performing high-density recording of record data, and storing the recorded data for a long time period such that the recorded data can be normally reproduced during the long time period. An optical information recording medium has a recording layer formed on a substrate, for having a laser beam irradiated thereto for recording and reproduction of record data. The recording layer includes a first sub-recording film and a second sub-recording film. The first sub-recording film is formed of a first material containing Si as the main component. The second sub-recording film is formed of a second material containing Cu as the main component and having Au added thereto, and disposed in the vicinity of the first recording film.

An optical information recording medium which makes it possible to reduce the noise level and improve the C/N ratio. An optical information recording medium has a recording layer formed on a substrate, for having a laser beam irradiated thereto for recording and reproduction of record data. The recording layer includes a first sub-recording film and a second sub-recording film. The first sub-recording film is formed of a first material containing Si as the main component. The second sub-recording film is formed of a second material containing Zn as the main component and having Cu added thereto, and disposed in the vicinity of the first recording film. The laser beam is irradiated to the recording layer via a light transmitting layer formed in a manner covering the recording layer side.

An optical recording medium includes a substrate, a light transmission layer and a plurality of recording layers between the substrate and the light transmission layer and capable of recording data in the plurality of recording layers and reproducing data recorded in the plurality of recording layers by projecting a laser beam via the light transmission layer onto the plurality of recording layers, at least one recording layer other than a farthest recording layer from the light transmission layer including a reflective film containing Ag as a primary component and C as an additive. In the thus constituted optical recording medium, recording characteristics and reproducing characteristic of the respective recording layers can be improved.

Optical recording medium

An optical recording medium includes a substrate, a light transmission layer and a plurality of recording layers between the substrate and the light transmission layer and capable of recording data in the plurality of recording layers and reproducing data recorded in the plurality of recording layers by projecting a laser beam via the light transmission layer onto the plurality of recording layers, at least one recording layer other than a farthest recording layer from the light transmission layer among the plurality of recording layers including a first recording film containing Si as a primary component and a second recording film located in the vicinity of the first recording film and containing Cu as a primary component. In the thus constituted optical recording medium, it is possible to record data in a farthest recording layer from the light transmission layer and reproduce data from the farthest recording layer in a desired manner.

Optical recording medium and method for recording and reproducing data

A high-speed, write-once type optical recording medium, which utilizes laser light that is either blue or an even shorter wavelength, as well as an optical recording method and an optical recording apparatus for recording onto this optical recording medium. A high-speed, write-once type optical recording mediumhaving a recording layerand a light transmission layerformed sequentially on top of a support substrate, wherein the recording layeris formed by laminating first and second vice-recording layersA,B which include Al and Sb respectively as primary components, and irradiation of a laser light of blue wavelength from a laser light source, through the light transmission layerand onto the recording layer, causes diffusion and mixing of the Al and Sb contained within the first and second vice-recording layersA,B, and this mixing enables the formation of a recording mark based on an irreversible change in reflectance. The thickness of the recording layeris set to enable recording at a recording transfer rate of at least 35 Mbps.

An optical recording medium includes a substrate, a first recording layer formed on the substrate and containing an element selected from the group consisting of Si, Sn and Ge as a primary component, and a second recording layer located in the vicinity of the first recording layer and containing Ag as a primary component, the optical recording medium being constituted to be irradiated by a laser beam projected onto the side opposite from the substrate. According to the thus constituted optical recording medium, it is possible to decrease a noise level and improve a C/N ratio in a reproduced signal.

An optical information recording medium which makes it possible to reduce the noise level and improve the C/N ratio. An optical information recording medium has a recording layer formed on a substrate, for having a laser beam irradiated thereto for recording and reproducing record data. The recording layer includes a first sub-recording film and a second sub-recording film. The first sub-recording film is formed of a first material containing Si as a main component. The second sub-recording film is formed of a second material containing Zn as a main component and having Al added thereto, and disposed in the vicinity of the first recording film. The laser beam is irradiated to the recording layer via a light transmitting layer formed in a manner covering the recording layer.

An optical information recording medium which makes it possible to reduce the noise level, improve the C/N ratio and store record data for a long time period. An optical information recording medium has a recording layer formed on a substrate, for having a laser beam irradiated thereto for recording and reproduction of record data. The recording layer includes a first sub-recording film and a second sub-recording film. The first sub-recording film is formed of a first material containing Si as the main component. The second sub-recording film is formed of a second material containing Al as the main component and having Cu added thereto, and disposed in the vicinity of the first recording film. The laser beam is irradiated to the recording layer via a light transmitting layer formed in a manner covering the recording layer side.

An optical information recording medium which makes it possible to reduce the noise level, improve the C/N ratio and store record data for a long time period. An optical information recording medium has a recording layer formed on a substrate, for having a laser beam irradiated thereto for recording and reproduction of record data. The recording layer includes a first sub-recording film and a second sub-recording film. The first sub-recording film is formed of a first material containing Si as the main component. The second sub-recording film is formed of a second material containing Al as the main component and having Ti added thereto, and disposed in the vicinity of the first recording film. The laser beam is irradiated to the recording layer via a light transmitting layer formed in a manner covering the recording layer side.

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Tokyo, Japan

Masaki Aoshima