Denso Corporation

Tetsuto Yamagishi

Yasutomi Asai

Norihisa Imaizumi

Tohru Nomura

Masayuki Takenaka

Shinji Hiramitsu

Toshihiro Nagaya

Yuki Inaba

Ryoichi Kaizu

Yoshitsugu Sakamoto

Kengo Oka

Takumi Nomura

Hiroki Yoshikawa

A semiconductor device includes a semiconductor chip having first and second main electrodes disposed on opposite surfaces of a silicon carbide substrate, first and second heat dissipation members disposed so as to sandwich the semiconductor chip, and joining members disposed between the first main electrode and the first heat dissipation member and between the second main electrode and the second heat dissipation member. At least one of the joining members is made of a lead-free solder having an alloy composition that contains 3.2 to 3.8 mass % Ag, 0.6 to 0.8 mass % Cu, 0.01 to 0.2 mass % Ni, x mass % Sb, y mass % Bi, 0.001 to 0.3 mass % Co, 0.001 to 0.2 mass % P, and a balance of Sn, where x and y satisfy relational expressions of x+2y≤11 mass %, x+14y≤42 mass %, and x≥5.1 mass %.

Semiconductor device

A semiconductor device includes a semiconductor chip made of a SiC substrate and having main electrodes on one surface and a rear surface, first and second heat sinks, respectively, disposed adjacent to the one surface and the rear surface, a terminal member interposed between the second heat sink and the semiconductor chip, and a plurality of bonding members disposed between the main electrodes, the first and second heat sinks, and the terminal member. The terminal member includes plural types of metal layers symmetrically layered in the plate thickness direction. The terminal member as a whole has a coefficient of linear expansion at least in a direction orthogonal to the plate thickness direction in a range larger than that of the semiconductor chip and smaller than that of the second heat sink.

Terminal member made of plurality of metal layers between two heat sinks

An electronic device includes: a resin substrate that includes insulation resin on which wiring made of conductive material is provided; a heat-generation element that is a circuit element mounted on a first surface of the resin substrate, and is operated to generate heat; and a sealing resin that is provided on the first surface, and seals the heat-generation element. An opposite surface of the sealing resin opposite to a surface of the sealing resin in contact with the first surface is thermally connected to a heat radiation member and mounted on the heat radiation member. Each of the resin substrate and the sealing resin has a bend shape convex toward the opposite surface when each of surrounding temperatures is a normal temperature and has a linear expansion coefficient for maintaining a bend shape convex toward the opposite surface when each of the surrounding temperatures is a high temperature.

Electronic device having sealed heat-generation element

A manufacturing method of an electronic device, including: a circuit board with a substrate through hole; a circuit element; and a resin mold with a mold through hole, using a first mold, a second mold having a cavity, and a pressing member protruding from a bottom of the cavity includes: fixing the circuit board to the first mold; fixing the second mold to the first mold to cover an opening of the substrate through hole by the pressing member; and forming the resin mold while covering the circuit element with the constituent material in the cavity. The circuit board is deformed by press-contacting the pressing member to the circuit board in a state where a part of the pressing member is inserted into the substrate through hole so that an opening area of the substrate through hole decreases toward a reverse surface from the one surface.

Method for manufacturing electronic device, and electronic device

A mold package being a half-mold type includes: a substrate includes a first face and a second face; an electronic component that is mounted on the first face; and a mold resin that is provided on the first face and seals the first face with the electronic component. The second face is exposed from the mold resin. The mold resin is disposed on the first face so as to seal a sealed portion and to expose a remaining part of the first face as an exposure portion. One side face is provided by an end side face. One side face is provided by a boundary side face. At least a site on a lower end of the boundary side face is provided by an inclined face. In the boundary side face, a site on an upper end side is provided by an other inclined face having a second inclination angle.

Half-mold type mold package

An electronic device includes: a substrate having first and second surfaces, wherein the first surface is opposite to the second surface; a first electronic element mounted on the first surface of the substrate; a second electronic element mounted on the second surface of the substrate; and a resin mold sealing the first electronic element and the first surface of the substrate. The resin mold further seals the second electronic element on the second surface of the substrate. The second surface of the substrate has a portion, which is exposed from the resin mold. The second electronic element is not disposed on the portion of the second surface.

Growing community of inventors

Kariya, Japan

Tetsuto Yamagishi