Jfe Steel Corporation

National Institute of Advanced Industrial Science and Technology

Tokin Corporation

Sunstar Engineering Pte. Ltd.

Jfe Precision Corporation

Raita Wada

Hoshiaki Terao

Naomichi Nakamura

Mineo Muraki

Takuya Takashita

Kimihiro Ozaki

Akiri Urata

Makoto Nakaseko

Yoshinori Shinagawa

Toshinori Tsuda

Kouichi Hashimoto

Tsuyoshi Nakatsuji

Makoto Yamaki

Yu Kanamori

Koichi Okamoto

Shoichi Sato

Provided is a heat sink having a clad structure of Co—Mo composite materials and Cu materials, satisfying high heat-sink properties required of the heat sink for use in a semiconductor package with a frame on which a high-output and small-sized semiconductor is mounted, and preventing, when applied to the semiconductor package with a frame, crack of the frame due to local stress concentration. The heat sink has three or more Cu layers and two or more Cu—Mo composite layers alternately stacked in a thickness direction so that the Cu layers are outermost layers on both sides thereof, the Cu layers as the outermost layers each having a thickness tof 40 μm or more, the heat sink satisfying 0.06≤t/T≤0.27 (where T: heat sink thickness) and t/T≤0.36/[(total number of layers−1)/2] (where t: Cu—Mo composite layer thickness, the total number of layers: sum of numbers of Cu layers and Cu—Mo composite layers).

Heat sink, semiconductor package and semiconductor module

Provided is a method of manufacturing a soft magnetic dust core. The method includes: preparing coated powder including amorphous powder made of an Fe-B-Si-P-C-Cu-based alloy, an Fe-B-P-C-Cu-based alloy, an Fe-B-Si-P-Cu-based alloy, or an Fe-B-P-Cu-based alloy, with a first initial crystallization temperature Tand a second initial crystallization temperature T; and a coating formed on a surface of particles of the amorphous powder; applying a compacting pressure to the coated powder or a mixture of the coated powder and the amorphous powder at a temperature equal to or lower than T−100 K; and heating to a maximum end-point temperature equal to or higher than T−50 K and lower than Twith the compacting pressure being applied.

Method of manufacturing soft magnetic dust core

A sintered friction material for brake having a high friction coefficient, with which reduction of the friction coefficient is prevented at high temperature and stable brake performance is maintained. It comprises: a metal matrix of Ni or Ni+Fe (small amount); a solid lubricant (a); and a friction adjusting material (b) including: metal or alloy particles (b1) having an average particle size of 50 &#x3bc;m or more and containing at least one selected from W, Mo, Cr, and FeW; and inorganic particles (b2) containing at least one selected from oxides, nitrides, carbides, and intermetallic compounds. An average particle size dof b1 and an average particle size dof b2 satisfy d&#x3c;d. Dispersing, in the metal matrix, b1 and b2 satisfying particular conditions as the friction adjusting material can produce a geometrical structure (particle structure with a high filling density) suitable for preventing plastic deformation of the sintered friction material.

Sintered friction material for brake

Growing community of inventors

Niigata, Japan

Raita Wada