Hitachi Power Semiconductor Device, Ltd.

Yujiro Takeuchi

Mutsuhiro Mori

Tomoyuki Miyoshi

Masaki Shiraishi

Tomoyasu Furukawa

So Watanabe

Yusuke Hotta

A semiconductor device having a high cutoff resistance capable of suppressing local current/electric field concentration and current concentration at a chip termination portion due to an electric field variation between IGBT cells due to a shape variation and impurity variation during manufacturing. The semiconductor device is characterized by including an emitter electrode formed on a front surface of a semiconductor substrate via an interlayer insulating film, a collector electrode formed on a back surface of the semiconductor substrate, a first semiconductor layer of a first conductivity type in contact with the collector electrode, a second semiconductor layer of a second conductivity type, a central area cell, and an outer peripheral area cell located outside the central area cell.

Semiconductor device and power conversion device

A current switching semiconductor device to be used in a power conversion device achieves both a low conduction loss and a low switching loss. The semiconductor device includes the IGBT in which only Gc gates are provided and an impurity concentration of the p type collector layer is high, and the IGBT in which the Gs gates and the Gc gates are provided and an impurity concentration of the p type collector layer is low. When the semiconductor device is turned off, the semiconductor device transitions from a state in which a voltage lower than a threshold voltage is applied to both the Gs gates and the Gc gates to a state in which a voltage equal to or higher than the threshold voltage is applied to the Gc gates prior to the Gs gates.

To provide a semiconductor device in which an IGBT having two gate terminals is driven by one control signal, and a continuous ON state and an ON state twice for one on-pulse signal are avoided. A semiconductor device includes: a control signal input terminal; an IGBT having a first gate terminal and a second gate terminal; a delay unit configured to delay an input signal for a delay time; and a logical product unit configured to calculate a logical product of a first input terminal and a second input terminal. The control signal input terminal is connected to an input terminal of the delay unit and a second input terminal of the logical product unit. An output terminal of the delay unit is connected to the first gate terminal of the IGBT and a first input terminal of the logical product unit. An output terminal of the logical product unit is connected to the second gate terminal of the IGBT.

Semiconductor device, method for controlling semiconductor device, and control circuit for semiconductor device

An electric power converter () which is provided with a switching element () and a rectifying element () that is connected in series to the switching element (). This electric power converter () has a configuration wherein an external electrical load () is connected to the connection point of the switching element () and the rectifying element (). The switching element () is composed of an insulating gate type semiconductor element that has a first gate terminal () and a second gate terminal (). The rectifying element () is composed of a diode that has a Schottky junction which uses silicon carbide as a semiconductor base. Different driving signals are applied to the first gate terminal () and the second gate terminal (), respectively.

Growing community of inventors

Tokyo, Japan

Yujiro Takeuchi