Hiroyuki Ota
Hiroyuki Ota, Yokohama JP
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20110006349 | FIELD EFFECT TRANSISTOR HAVING CHANNEL SILICON GERMANIUM - Field effect transistors and methods of making field effect transistors are provided. The field effect transistor can contain a semiconductor substrate containing shallow trench isolations; a silicon germanium layer in a trench at an upper surface of the semiconductor substrate between the shallow trench isolations; a gate feature on the silicon germanium layer; and metal silicides on the upper potions of silicon germanium layer and semiconductor substrate that are not covered by the gate feature. The silicon germanium layer has a bottom surface and a top surface having a (100) plane and side surfaces having two or more planes. | 01-13-2011 |
Hiroyuki Ota, Tsukuba-Shi JP
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20080318442 | Semiconductor device manufacturing method and substrate processing apparatus - The present invention has an object of providing a substrate processing apparatus and a semiconductor device manufacturing method that can prevent adverse effects on electrical characteristics and provide a thinner EOT. | 12-25-2008 |
Hiroyuki Ota, Matumoto-Shi JP
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20120018404 | DIRECT-CURRENT SWITCH - A miniaturized direct-current switch with which power loss is reduced when establishing continuity of a direct-current path is provided. The direct-current switch includes an electronic open/close switch inserted in a direct-current path along which a direct current flows in order to make the direct-current path an open circuit or a closed circuit, a parallel mechanical open/close switch connected in parallel to the electronic open/close switch, and a switch control circuit that controls the opening or closing time difference mutually between the parallel mechanical open/close switch and the electronic open/close switch, wherein the switch control circuit makes the parallel mechanical open/close switch a closed circuit a predetermined time after the electronic open/close switch has been made a closed circuit. | 01-26-2012 |
Hiroyuki Ota, Atsugi JP
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20120062157 | BRUSHLESS MOTOR CONTROL DEVICE AND BRUSHLESS MOTOR SYSTEM - Provided are a brushless motor control device and a brushless motor system capable of preventing impossibility of intended control of a brushless motor resulting from false recognition that the brushless motor is in operation in spite of stoppage of the brushless motor. A brushless motor control unit calculates a voltage instruction, representing voltages to be applied to the brushless motor, according to a control instruction supplied from an upper control device. A position error calculation unit calculates and estimates a position error between d-q-axes and dc-qc-axes as rotational coordinate axes by use of the voltage instruction outputted by the brushless motor control unit, current values acquired by a coordinate transformation unit and revolution speed for control of the brushless motor. A fault detection unit judges whether the brushless motor is faulty or not based on the position error calculated by the position error calculation unit. | 03-15-2012 |
20150236626 | BRUSHLESS MOTOR CONTROL DEVICE AND BRUSHLESS MOTOR SYSTEM - Provided are a brushless motor control device and a brushless motor system capable of preventing impossibility of intended control of a brushless motor resulting from false recognition that the brushless motor is in operation in spite of stoppage of the brushless motor. A brushless motor control unit calculates a voltage instruction, representing voltages to be applied to the brushless motor, according to a control instruction supplied from an upper control device. A position error calculation unit calculates and estimates a position error between d-q-axes and dc-qc-axes as rotational coordinate axes by use of the voltage instruction outputted by the brushless motor control unit, current values acquired by a coordinate transformation unit and revolution speed for control of the brushless motor. A fault detection unit judges whether the brushless motor is faulty or not based on the position error calculated by the position error calculation unit. | 08-20-2015 |
Hiroyuki Ota, Tokyo JP
Patent application number | Description | Published |
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20140027868 | MECHANICAL QUANTITY MEASURING DEVICE - In a mechanical quantity measuring device ( | 01-30-2014 |
20140042566 | MECHANICAL QUANTITY MEASURING DEVICE, SEMICONDUCTOR DEVICE, EXFOLIATION DETECTING DEVICE, AND MODULE - A mechanical quantity measuring device ( | 02-13-2014 |