Nissan Motor Company Limited

Shuuji Adachi

Kimio Nishimura

Kiyoshi Hasegawa

Mitsuo Uchiyama

Takahiro Iwasaki

Yoshirou Noguchi

Fumiyuki Komiyama

Shuuji Kobayashi

Kiyoshi Haseagawa

A boring cutter body () is inserted into a circular hole () and is rotated and moved in an axial direction, whereby screw-shaped groove parts () are formed by using a tool bit () provided on a tip end of an outer peripheral portion, and broken surfaces () are formed by breaking tips of ridge parts generated by formation of the groove parts (). Moreover, the groove parts () are processed through electric discharge machining using a wire electrode () provided to the boring cutter body () behind the tool bit () in the rotating direction, thereby forming finely roughened portions () having more finely roughened shapes than the broken surfaces ().

Prespray processing method

A semiconductor module includes a plurality of semiconductor elements, a first tabular electrode coupled to one face side of the plurality of semiconductor elements, a second tabular electrode coupled to the other face side of the plurality of semiconductor elements, and a molding material that encapsulates the plurality of semiconductor elements between the first electrode and the second electrode. A protrusion extending toward the second electrode is provided in a circumferential edge portion of the first electrode, and the protrusion surrounds the molding material.

Semiconductor module, molding apparatus, and molding method

There are provided a process of forming a recess groove having a depth shallower than and a width larger than the notch groove for fracturing at a portion of fracturing and splitting in the permanent magnet; a process of forming the notch groove for fracturing the permanent magnet in a groove bottom of the recess groove formed in the recess-groove forming process; and a process of fracturing and splitting the permanent magnet along the notch groove so as to obtain magnet pieces.

Manufacturing method of a permanent magnet dispoded in a rotating electrical machine

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Tokyo, Japan

Shuuji Adachi