Taiyo Yuden Co., Ltd.

Shinichi Kojo

Atsuo Shimizu

Tomoo Kashiwa

Fuyuki Miyazawa

Fumi Hara

Takuo Kodaira

Takeshi Otsu

Motomitsu Hagiwara

Kazunobu Takeguchi

Syunichi Ohno

Akihisa Endo

According to one or more embodiments of the present invention, a coil element includes a base body, an internal conductor provided within the base body, a first external electrode electrically connected to one of ends of the internal conductor, and a second external electrode electrically connected to the other end of the internal conductor. The base body contains a plurality of metal magnetic particles, a resin portion between the metal magnetic particles and a void. The base body includes a first region and a second region surrounding the first region, and a second area void ratio of the second region is higher than a first area void ratio of the first region. The internal conductor is provided in the first region of the base body.

Coil component

An object of the present invention is to provide a recordable optical recording medium whose characteristics do not deteriorate when recording is conducted in a high-temperature environment. The present invention provides a recordable optical recording medium comprising a substrate as well as at least a reflection layer, recording layer, and light transmission layer provided on the substrate, wherein the recording layer of said optical recording medium contains (a) an azo metal complex dye and (b) another dye whose decomposition temperature is 240&#xb0; C. to 360&#xb0; C.

Optical recording medium

An optical information recording medium includes an optical disk body including a light-transmitting substrate, a recording layer provided on a main surface of the light-transmitting substrate over a region in which pre-grooves are formed and a portion of a region in which dummy grooves are formed, and a reflecting layer provided over the recording layer and a region of the light-transmitting substrate in which the recording layer is not provided; and an ink receiving layer provided on the label surface side of the optical disc body. The dummy grooves provided in at least a portion of the region in which the dye material is not applied have a pitch larger than that of the pre-grooves, are shallower than that of the pre-grooves, or have half-width less than that of the pre-grooves.

Optical information recording medium

Provided is an optical information recording medium that can be recorded with data with only a special recording apparatus and the recorded data can be read out with a general recording/reproducing apparatus. The optical information recording medium includes a disc-like light-transmissive substrate having a surface provided with a spiral groove WB having a wobble and a land LN between adjacent segments of the groove WB, a light-absorbing layer disposed on the surface of the light-transmissive substrate, and a light reflection layer disposed on the light-absorbing layer. The groove WB has a depth Ds of about 140 nm&#x2266;Ds&#x2266;155 nm, the light-absorbing layer has a recess with a depth Dd of about 95 nm&#x2266;Dd&#x2266;105 nm in the groove, and a push-pull signal before recording has a value of about 0.3 or less. The optical information recording medium may include an anti-illegal copy measure.

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Gunma, Japan

Shinichi Kojo