997 patents
Page 34 of 50
Utility
Semiconductor device
2 Nov 20
Provided is a semiconductor device including a buffer region.
Yasunori Agata, Takashi Yoshimura, Hiroshi Takishita
Filed: 20 Dec 18
Utility
Semiconductor device
2 Nov 20
A semiconductor device is provided comprising a semiconductor substrate of a first conductivity type and a dummy trench portion having a main body portion and one or more branch portions, the main body portion formed in a front surface of the semiconductor substrate and extending in a predetermined extending direction, the branch portions extending from the main body portion in directions different from the extending direction.
Tatsuya Naito
Filed: 23 Jun 19
Utility
Method of manufacturing silicon carbide semiconductor device, and method of manufacturing silicon carbide substrate
26 Oct 20
A plurality of trenches are formed so as to reach a prescribed depth from the surface of an n-type epitaxial layer.
Yasuyuki Kawada
Filed: 6 Jan 19
Utility
Insulated-gate bipolar transistor (IGBT) including a branched gate trench
26 Oct 20
At a portion at which a gate trench is branched, the trench is formed at a deeper position than at portions of the gate trench having a linear shape.
Tatsuya Naito
Filed: 28 Nov 17
Utility
Semiconductor device and semiconductor circuit device
26 Oct 20
In a transistor region of an active region, trench-gate MOS gates for a vertical MOSFET are formed on the front surface side of a semiconductor substrate.
Keishirou Kumada, Yasuyuki Hoshi, Yoshihisa Suzuki, Yuichi Hashizume
Filed: 4 Jul 19
Utility
Gate driver and power converter
26 Oct 20
A gate driver includes: a gate drive unit configured to drive a gate of a switching element in accordance with an input signal that commands to turn on or to turn off the switching element; a timing determination unit configured to measure an on-time width from when the input signal is switched to an on-command to when the input signal is switched to an off-command, and configured to determine, based on the measured on-time width, an intermediate timing that is before switch-off surge voltage of the switching element reaches a peak; and a driving condition changing unit configured to change a gate driving condition of the switching element at the intermediate timing determined by the timing determination unit.
Tsuyoshi Nagano, Kunio Matsubara
Filed: 24 Feb 20
Utility
Isolated DC/DC converter, control unit for isolated DC/DC converter, and DC/AC converter
26 Oct 20
An isolated DC/DC converter includes: DC/AC converter; an isolation transformer; a rectifier circuit; and a control unit.
Takashi Iida, Yukihiro Nishikawa
Filed: 18 Feb 19
Utility
Current detection circuit and current detection method of semiconductor element
19 Oct 20
A current detection circuit includes: a current detection unit configured to detect a potential difference between both ends of a first current detection resistor interposed between a control terminal and a drive circuit of a voltage-controlled semiconductor element including a current detection terminal; a voltage detection unit configured to detect a voltage at one of the both ends of the first current detection resistor; a voltage determination unit configured to determine whether or not a detection voltage of the voltage detection unit is not less than a threshold voltage; a voltage level adjustment unit configured to adjust a voltage level of a current detection voltage of the current detection terminal by a logical product signal of a current detection signal and a voltage determination signal; and an overcurrent detection unit configured to output an overcurrent detection signal when the adjusted current detection voltage is not less than a threshold voltage.
Masashi Akahane
Filed: 24 Oct 18
Utility
Power supply system and power supply apparatus
19 Oct 20
A power supply system, including: a plurality of power supply apparatuses; and an acquisition unit to acquire a load parameter representing load state of the plurality of power supply apparatuses as a whole, wherein each power supply apparatus has a control unit to control, depending on the load parameter, output by said power supply apparatus according to a reference condition different from at least the other one of the plurality of power supply apparatuses, will be provided.
Ryuji Yamada
Filed: 22 Apr 18
Utility
Power conversion device
19 Oct 20
A power conversion device including an alternating current (AC) source, a plurality of switching units connected in series between positive and negative terminals of the AC source, each including a semiconductor switching element and having a load connected thereto, each switching unit outputting, to the load connected thereto, an input current from the AC source and a direct current (DC) output voltage that is generated through ON/OFF control of the semiconductor switching elements, a capacitor connected in parallel with the AC source and with the switching units, an inductor inserted between the capacitor and the switching units, and between the AC source and the switching units, a current measurement unit that measures a value of a current flowing from the AC source to the capacitor, and a control device that performs the ON/OFF control on the semiconductor switching elements on the basis of the measured current value.
Satoru Fujita, Ryuji Yamada
Filed: 25 Jun 18
Utility
Wastewater treatment method and wastewater treatment system
12 Oct 20
System and method for treating scrubber and ballast wastewater at the same time.
Yosuke Hanai, Eiju Nakada, Yasuzo Sakai
Filed: 27 Jun 18
Utility
Permanent magnet type rotating electric machine and manufacturing method of the same
12 Oct 20
A rotor core (21) in a permanent magnet type rotating electric machine (1) is formed by laminating a plurality of plate materials (21A), (21B), (21C), and (21D) and includes one or a plurality of center bridges (26) formed between adjacent magnet slots (23) to couple an outer peripheral edge (24) and a core portion (25) together in one magnetic pole.
Toshikazu Kubo, Satoshi Imamori
Filed: 26 Feb 18
Utility
Drive circuit
12 Oct 20
A drive circuit of a power device, including an internal power supply, a set-side pulse generation circuit and a reset-side pulse generation circuit that are connected to the internal power supply, for generating a set signal and a reset signal respectively upon detecting that a logic input signal changes from a first logic level to a second logic level, or changes from the second logic level to the first logic level, a set-side level shift circuit and a reset-side level shift circuit that respectively level-shift the set signal and the reset signal, a control circuit that turns on and off the power device respectively responsive to the level-shifted set signal and the level-shifted reset signal, and an ensuring circuit that ensures a first state and a second state, in which the power device is respectively off and on, when the logic input signal is at the first logic level and the second logic level.
Masashi Akahane
Filed: 27 Jan 20
Utility
Silicon carbide semiconductor substrate, method of manufacturing silicon carbide semiconductor substrate, semiconductor device, and method of manufacturing semiconductor device
5 Oct 20
A silicon carbide semiconductor substrate includes a silicon carbide substrate of a first conductivity type, an epitaxial layer of the first conductivity type provided on a front surface of the silicon carbide substrate, an impurity concentration of the epitaxial layer being 1×1017/cm3 to 1×1018/cm3, and a film thickness of the epitaxial layer being 1 μm to 5 μm.
Takeshi Tawara
Filed: 19 Apr 20
Utility
Semiconductor device
5 Oct 20
An accumulation layer has a function of reducing an ON voltage (Von), which is a voltage between the collector and the emitter when turning on the IGBT, by accumulating carrier.
Tatsuya Naito
Filed: 25 Nov 18
Utility
Uninterruptible power supply
5 Oct 20
An uninterruptible power supply includes a power converter, a detector that detects a voltage value or a current value, and a controller that controls the power converter based on the detected voltage value or current value and generates one or more command values.
Yasuhiro Tamai
Filed: 28 Jan 19
Utility
Integrated circuit device
5 Oct 20
An integrated circuit device includes a circuit device main body which is configured to execute a predetermined processing function, a communication control circuit which is configured to perform data communication with an external control device and an operation mode determination unit which is configured to selectively determine a normal mode for executing the processing function or a debug mode for setting an execution condition of the processing function as an operation mode of the circuit device main body.
Masashi Akahane
Filed: 27 Sep 18
Utility
Semiconductor device, semiconductor package, semiconductor module, and semiconductor circuit device
5 Oct 20
A semiconductor device that can detect temperature appropriately is provided.
Kenichiro Sato
Filed: 23 Jan 19
Utility
Semiconductor device and method of manufacturing same
28 Sep 20
A semiconductor device includes a first barrier film covering the main surface of the active region and the insulating film layer, the first barrier film having an ohmic contact hole that exposes a contact portion of the ohmic contact formation region within the window of the insulating film layer; a base contact layer filled into the ohmic contact hole and making ohmic contact with the contact portion of the ohmic contact formation region; a second barrier film made of titanium, covering the base contact layer and the first barrier film; and a third barrier film made of titanium oxide and titanium nitride, covering a surface of the second barrier film.
Makoto Utsumi, Yoshiyuki Sakai
Filed: 5 Sep 18
Utility
Uninterruptible power supply system and uninterruptible power supply
28 Sep 20
A plurality of uninterruptible power supplies of an uninterruptible power supply system controls start or stop of shared current supply from power converters to a load based on shared current commands, which indicate command values for determining a value of shared current to be supplied from the power converters of the plurality of uninterruptible power supplies to the load.
Kazuyoshi Umezawa
Filed: 28 Jan 19