Seiji Takeda
Seiji Takeda, Hokkaido JP
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20100032653 | Carbon Nanotube Electric Field Effect Transistor and Process for Producing the Same - This invention provides a process for producing a carbon nanotube electric field effect transistor that can improve yield in channel preparation. Carbon nanotubes dispersed in a mixed acid composed of sulfuric acid and nitric acid are subjected to radical treatment with aqueous hydrogen peroxide to cut the carbon nanotubes and thus to provide carboxyl-introduced carbon nanotube fragments. The carbon nanotube fragments are attached, through a covalent bond and/or an electrostatic bond, to a site, where a source electrode is to be formed, and a site where a drain electrode is to be formed, in a substrate with a functional group, to be attached to a carboxyl group, introduced thereinto. The carbon nanotube fragments attached to the substrate are attached to carbon nanotubes as channels through n-n interaction to fix the carbon nanotubes as channels to the substrate. | 02-11-2010 |
Seiji Takeda, Fukui City JP
Seiji Takeda, Sapporo JP
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20080283875 | FIELD EFFECT TRANSISTOR, BIOSENSOR PROVIDED WITH IT, AND DETECTING METHOD - A high-sensitivity field effect transistor using as a channel ultrafine fiber elements such as carbon nanotube, and a biosensor using it. The field effect transistor comprises a substrate, a source electrode and a drain electrode arranged on the substrate, a channel for electrically connecting the source electrode with the drain electrode, and a gate electrode causing polarization due to the movement of free electrons in the substrate. For example, the substrate has a support substrate consisting of semiconductor or metal, a first insulating film formed on a first surface of the support substrate, and a second insulating film formed on a second surface of the support substrate, the source electrode, the drain electrode, and the channel arranged on the first insulating film, the gate electrode disposed on the second insulating film. | 11-20-2008 |
Seiji Takeda US
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20110180427 | Method for Sensing a Substance to be Detected in a Sample - A single-electron transistor comprising at least a substrate, a source electrode and a drain electrode formed on top of the substrate opposing to each other, and a channel arranged between the source electrode is disclosed wherein the channel is composed of ultra fine fibers. By having such a constitution, a sensor can have excellent sensitivity. | 07-28-2011 |
Seiji Takeda, Sapporo-Shi JP
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20110183438 | Method for Sensing a Substance to be Detected in a Sample - A single-electron transistor comprising at least a substrate, a source electrode and a drain electrode formed on top of the substrate opposing to each other, and a channel arranged between the source electrode is disclosed wherein the channel is composed of ultra fine fibers. By having such a constitution, a sensor can have excellent sensitivity. | 07-28-2011 |
20110186516 | METHOD OF PRODUCING A CARBON NANOTUBE FRAGMENT - This invention provides a process for producing a carbon nanotube fragment. In particular, this invention provides a method of producing a carbon nanotube fragment by the steps of 1) dispersing a carbon nanotube in a mixed acid of sulfuric acid and nitric acid, and 2) subjecting the dispersed carbon nanotube to an oxidation treatment to obtain a dispersion of carbon nanotube fragment in the mixed acid. Preferably, in the oxidation treatment the dispersed carbon nanotube is oxidized with a hydrogen peroxide added in the mixed acid. | 08-04-2011 |
Seiji Takeda, Fukui JP
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20130015983 | ON-BOARD VEHICLE WARNING SYSTEM AND VEHICLE DRIVER WARNING METHOD - An on-board vehicle warning system includes a location detecting section, a regulation retrieving section, an incoming message receiving section and a potential violation alerting section. The location detecting section detects respective geographic locations of a vehicle and a forthcoming intersection. The regulation retrieving section retrieves, based on the intersection location, a jurisdiction including local intersection regulation information pertaining to a vehicle position with respect to an intersection boundary at the time of a particular phase transition of a traffic light. The incoming message receiving section receives intersection status information of the intersection containing a geographic location of the boundary and phase information including a current phase and a time to the phase transition of a traffic light of the intersection. The potential violation alerting section estimates a future position of the vehicle with respect to the boundary at the occurrence of the phase transition to determine a potential violation. | 01-17-2013 |
Seiji Takeda, Yokohama JP
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20150277041 | OPTICAL DEVICE AND MANUFACTURING METHOD THEREFOR - An optical device includes an SOI substrate, the embedded insulating layer having a thickness of 200 nanometers (nm) or less; an optical waveguide comprising a Group III-V compound semiconductor material formed on top of the SOI substrate; and an optical leakage preventing layer formed inside the SOI substrate on a bottom side of the optical waveguide to prevent leakage of light from inside the optical waveguide towards the SOI substrate. | 10-01-2015 |
20150316719 | OPTICAL DEVICE AND MANUFACTURING METHOD THEREFOR - An optical device includes an SOI substrate, the embedded insulating layer having a thickness of 200 nanometers (nm) or less; an optical waveguide comprising a Group III-V compound semiconductor material formed on top of the SOI substrate; and an optical leakage preventing layer formed inside the SOI substrate on a bottom side of the optical waveguide to prevent leakage of light from inside the optical waveguide towards the SOI substrate. | 11-05-2015 |
Seiji Takeda, Tokyo JP
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20160070405 | PROGRAMMABLE DISPLAY AND CONTROL METHOD - In order to suppress facility cost and improve convenience of input and output of data, a programmable display device includes a cradle section connected to an apparatus to be controlled, and a tablet section attachable and detachable to/from the cradle section. The cradle section and the tablet section transmit and receive information therebetween through short-distance radio communication. | 03-10-2016 |