Toyota Jidosha Kabushiki Kaisha

Masaru Nagao

Masahiro Sugimoto

Narumasa Soejima

Hidefumi Takaya

Kazumi Chida

Hidemi Senda

Masato Hashimoto

Keiko Neki

Norihisa Okayama

A semiconductor substrate of a semiconductor device includes a first conductive body region that is formed in the element region; a second conductive drift region that is formed in the element region; a gate electrode that is formed in the element region, that is arranged in a gate trench, and that faces the body region; an insulating body that is formed in the element region and is arranged between the gate electrode and an inside wall of the gate trench; a first conductive floating region that is formed in the element region and that is surrounded by the drift region; a first voltage-resistance retaining structure that is formed in the peripheral region and that surrounds the element region; and a gate pad that is formed in the peripheral region, and is electrically connected to the gate electrode in a position on the element region-side of the first voltage-resistance retaining structure.

Semiconductor device

A sensing device, such as an angular speed detecting device, includes a vibrator for improving detection precision. The vibrator is displaceably supported on a substrate and is vibrated in the direction of an X-axis by driving electrodes. Detecting electrodes detect vibrations of the vibrator in the direction of a Y-axis caused by a Coriolis' force resulting from the angular speed occurring about a Z-axis. Each of the driving and detecting electrodes includes a movable electrode that is connected to the vibrator and that is displaced together therewith on the substrate and a fixed electrode fixed onto the substrate in such a manner as to face the movable electrode. By equalizing conductors connected to fixed electrodes of the driving electrodes and conductors connected to fixed electrodes of the detecting electrodes in length, width, and thickness, respectively, one electrical characteristic is set for those of the wiring portions which function in the same manner.

Sensing device and sensor apparatus

An oscillator,and main frames,-,and,-,, coupled to one another by beams,-,through,-,, float above the upper face of a substrate,. The main frames,-,and,-,are divided into a plurality of sections along a Y-axis. Drive electrode portions,1-,through,-,drive the main frames,-,and,-,and the oscillator,in the direction of an X-axis. Due to an angular rate around a Z-axis perpendicular to the X and Y axes, the oscillator,oscillates in the direction of the Y-axis. The oscillation in the direction of the Y-axis is measured using a high-frequency signal applied to detection electrode portions,-,through,-,, whereby the angular rate is detected. The main frame,-,is provided with drive electrode portions,-,and,-,, while the main frame,-,is provided with drive electrode portions,-,and,-,. Drive signals independent from one another are supplied to the drive electrode portions,-,through,-,, whereby the main frames,-,and,-,are caused to oscillate precisely in the direction of the X-axis.

Angular rate detecting device

A bus drive source circuit, for use in communications, having a twisted-pair cable for communication among controllers mounted in a vehicle. In order to suppress the occurrence of radio frequency noise, a current mirror circuit is employed for causing the inflow of a current having a predetermined value over one wire of the twisted-pair cable as well as the outflow of a current having the same value as the current with the predetermined value along the other wire of the twisted-pair cable, thereby securing the symmetric property of the current.

Growing community of inventors

Yatomi, Japan

Masaru Nagao