Patents by Inventor Masahiko Ando

Masahiko Ando has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7202496
    Abstract: The present method prevents malfunctions in switching caused by a light leakage current in an active matrix type thin film transistor substrate for a liquid crystal display and prevents display failures, by selectively disposing a self assembled monolayer film in a gate electrode-projected region of the surface of an insulator film with high definition, and by selectively improving the orientation order of an organic semiconductor film only in the gate electrode-projected region without improving the order at an irradiated portion with light outside the gate electrode-projected region.
    Type: Grant
    Filed: October 21, 2004
    Date of Patent: April 10, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Masahiko Ando, Masatoshi Wakagi, Hiroshi Sasaki
  • Publication number: 20070058101
    Abstract: It is an object of the present invention to prevent degradation of an organic semiconductor film caused in forming an alignment layer and to inexpensively provide a liquid crystal display device with a high-performance organic thin film transistor. According to the invention, in a liquid crystal display device that includes: a thin film transistor substrate having such members as a thin film transistor composed of a gate electrode, a gate insulating film, source/drain electrodes, and a semiconductor layer, a line, and a pixel electrode; and an opposing substrate supporting a liquid crystal layer between the thin film transistor substrate and the opposing substrate, no alignment layer having a function of controlling alignment of molecules in the liquid crystal layer is interposed between the semiconductor layer and the liquid crystal layer.
    Type: Application
    Filed: August 28, 2006
    Publication date: March 15, 2007
    Inventors: Masahiro Kawasaki, Takeo Shiba, Shuji Imazeki, Masahiko Ando
  • Publication number: 20060275994
    Abstract: The present invention provides a thin film transistor comprising a drain electrode and a source electrode separated by a channel region formed over a contact portion with an amorphous silicon layer and wherein an impurity from the channel region is removed and a remaining impurity is diffused into the contact portion to form a contact layer wherein the contact layer has a second resistance at least lower than the first resistance.
    Type: Application
    Filed: August 14, 2006
    Publication date: December 7, 2006
    Applicant: Hitachi, Ltd.
    Inventors: Masahiko Ando, Masahiro Kawasaki, Masatoshi Wakagi
  • Patent number: 7145176
    Abstract: An active matrix display device using a thin film transistor as a switching element in the displaying portion or driving portion is characterized in that said thin film transistor includes an insulating substrate on which a gate electrode, a gate insulating film, a semiconductor layer, a drain electrode, a source electrode and a passivation film are successively laminated. The thin film transistor is further characterized such that the surface portion of the semiconductor layer on the side of the passivation film is porous, which enables the device to be stably driven with a low off-current even in the case of disposing an organic passivation film and a picture element electrode on the thin film transistor.
    Type: Grant
    Filed: August 29, 2001
    Date of Patent: December 5, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masahiro Kawasaki, Masahiko Ando, Masatoshi Wakagi
  • Publication number: 20060267006
    Abstract: In the present invention, a lower electrode is utilized as a photomask to form a liquid-repellent region having a generally same pattern shape as that of the lower electrode and a liquid-attracting region having a generally reversed pattern shape on an insulating film. A conductive ink is coated and calcined in the liquid-attracting region to form an upper electrode having a generally reversed pattern shape to the lower electrode in a self-aligned manner, eliminating the occurrence of misregistration even when a printing method is used. Consequently, semiconductor devices such as an active matrix thin film transistor substrate can be formed using a printing method.
    Type: Application
    Filed: August 8, 2006
    Publication date: November 30, 2006
    Applicant: Hitachi, Ltd.
    Inventors: Masahiko Ando, Masaya Adachi, Hiroshi Sasaki, Masatoshi Wakagi
  • Publication number: 20060261334
    Abstract: Using a lower electrode as a photomask, a yophobic region having generally the same pattern as that of the lower electrode and a yophibic region having a pattern which is generally the inversion of the lower electrode pattern are formed on an insulating film. A conductive ink is applied to the yophobic region and baked. Thus, an upper electrode having a pattern which is generally the inversion of the lower electrode pattern is formed in a self-alignment manner. Therefore no misalignment occurs even if a printing method is used. Thus, a semiconductor device such as an active-matrix thin-film transistor substrate can be fabricated by using a printing method.
    Type: Application
    Filed: August 18, 2004
    Publication date: November 23, 2006
    Inventors: Masahiko Ando, Masaya Adachi, Hiroshi Sasaki, Masatoshi Wakagi
  • Patent number: 7112500
    Abstract: The present invention provides a thin film transistor comprising a drain electrode and a source electrode separated by a channel region formed over a contact portion with an amorphous silicon layer and wherein an impurity from the channel region is removed and a remaining impurity is diffused into the contact portion to form a contact layer wherein the contact layer has a second resistance at least lower than the first resistance.
    Type: Grant
    Filed: July 11, 2001
    Date of Patent: September 26, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masahiko Ando, Masahiro Kawasaki, Masatoshi Wakagi
  • Patent number: 7102155
    Abstract: In the present invention, a lower electrode is utilized as a photomask to form a liquid-repellent region having a generally same pattern shape as that of the lower electrode and a liquid-attracting region having a generally reversed pattern shape on an insulating film. A conductive ink is coated and calcined in the liquid-attracting region to form an upper electrode having a generally reversed pattern shape to the lower electrode in a self-aligned manner, eliminating the occurrence of misregistration even when a printing method is used. Consequently, semiconductor devices such as an active matrix thin film transistor substrate can be formed using a printing method.
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: September 5, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masahiko Ando, Masaya Adachi, Hiroshi Sasaki, Masatoshi Wakagi
  • Patent number: 7081641
    Abstract: An object of the present invention is to provide a semiconductor device such as a display device, ID tag, sensor or the like at low cost by using a bottom contact type organic TFT as a switching element. In the present invention, the semiconductor layer of the bottom contact type organic TFT is formed of a polycrystalline material, and the taper width of each of the source and drain electrodes of the TFT in the direction of the channel length is smaller than the average particle size of semiconductor crystals grown on the source and drain electrodes. Alternatively, the side on the channel side of each of the source and drain electrodes of the bottom contact type organic TFT is formed so as to be convex upward with respect to the substrate surface.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: July 25, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masahiro Kawasaki, Shuji Imazeki, Masahiko Ando
  • Patent number: 7053422
    Abstract: The present invention provides a solid state light-emissive display apparatus of high brightness and efficiency, high reliability, and of thin type, and method of manufacturing the same at low cost. Said apparatus has the luminous thin film made up by laminating or mixing crystal fine particle coated with insulator (5) of nm size and fluorescent fine particles (7) of nm size, and the lower electrode and the transparent upper electrode sandwiching said luminous thin film, wherein the electrons injected from said lower electrode are accelerated in the crystal fine particle coated with insulator layer (6) not being scattered by phonons to become high energy ballistic electrons, and form excitons (13) by colliding excitation of fluorescent fine particles. Since said fluorescent fine particles are of nm size, the exciton concentration is high, and luminescence intensity by extinction of excitons is also high.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: May 30, 2006
    Assignee: Japan Science and Technology Agency
    Inventors: Masahiko Ando, Toshikazu Shimada, Masatoshi Shiiki, Shunri Oda, Nobuyoshi Koshida
  • Publication number: 20060110847
    Abstract: To provide a method of easily producing TFT in which the orientation of channel molecules or wires is enhanced, compared with conventional type organic TFT at a low price, a lyophilic TFT pattern encircled by a lyophobic area is formed on a substrate, spontaneous movement is made in a droplet containing organic molecules or nanowires dropped in a channel region by characterizing the form of the pattern, and the organic molecules or the nanowires are oriented in the channel region by the movement.
    Type: Application
    Filed: August 2, 2005
    Publication date: May 25, 2006
    Inventors: Masaaki Fujimori, Tomihiro Hashizume, Masahiko Ando
  • Patent number: 7045816
    Abstract: The present invention provides a thin film transistor, wherein the semiconductor channel region is patterned. Gate electrodes 102, gate insulating film 103, source electrodes 104, and drain electrodes 105 are formed on a glass substrate 101. A patterned insulating film is formed thereon, and a part of the film in the region 110 on the gate electrode is removed. An organic semiconductor film is formed thereon by vapor deposition. The organic semiconductor film 107 in the region 110, where the patterned insulating film is removed, becomes a channel region, and is separated from the organic semiconductor film 108 on the patterned insulating film 106. Therefore, the organic semiconductor channel region is patterned to have the same size as the gate electrode. In accordance with the present invention, a thin film transistor, wherein the semiconductor region is patterned precisely, becomes available.
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: May 16, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Shingo Ishihara, Masatoshi Wakagi, Masahiko Ando
  • Publication number: 20060057368
    Abstract: An object of the present invention is to provide a pressure-sensitive adhesive composition which is excellent in antistatic property of a non-electrification-prevented adherend (a subject to be protected) upon peeling, and has reduced stainability in an adherend and is excellent in adhesion reliance, and electrification preventing pressure-sensitive adhesive sheets and surface protecting films using the same. There is provided a pressure-sensitive adhesive composition, which comprises a (meth)acryl-based polymer containing, as a monomer component, 5 to 100% by weight of a (meth)acrylic acid alkylene oxide adduct, 0 to 95% by weight of a (meth)acryl-based monomer having an alkyl group of a carbon number of 1 to 14 other than the adduct, and 0 to 95% by weight of other polymerizable monomer, and an alkali metal salt, wherein an acid value of the (meth)acryl-based polymer is 10 or lower.
    Type: Application
    Filed: September 15, 2005
    Publication date: March 16, 2006
    Inventors: Natsuki Kobayashi, Tatsumi Amano, Masahiko Ando
  • Publication number: 20060057371
    Abstract: An object of the present invention is to provide a pressure-sensitive adhesive composition which is excellent in antistatic property of a non-electrification-prevented adherend (a subject to be protected) upon peeling, and has reduced stainability in an adherend and is excellent in adhesion reliance, and electrification preventing pressure-sensitive adhesive sheets and surface protecting films using the same. There is provided a pressure-sensitive adhesive composition, which comprises a (meth)acryl-based polymer containing, as a main component, a (meth)acryl-based monomer having an alkyl group of a carbon number of 6 to 14, wherein the pressure-sensitive adhesive composition contains an ethylene oxide group-containing compound and an alkali metal salt, and the alkali metal salt is contained at an amount of less than 1 part by weight relative to 100 parts by weight of the (meth)acryl-based polymer.
    Type: Application
    Filed: September 15, 2005
    Publication date: March 16, 2006
    Inventors: Natsuki Kobayashi, Tatsumi Amano, Masahiko Ando
  • Publication number: 20060058937
    Abstract: If oil temperature is equal to or higher than a predetermined temperature and if accelerator opening change rate is equal to or higher than a predetermined change rate upon detection of a downshift instruction, an ECT-ECU sets modes corresponding to conditions for determination period calculation processings, hydraulic-pressure temporal change rate calculation processings, and torque adjustment amount calculation processings, respectively. By performing downshift on the basis of a determination period, a hydraulic-pressure temporal change rate, and a torque adjustment amount corresponding to a set mode, the ECT-ECU improves gear-shift responsive characteristics and restrains the occurrence of a gear-shift shock.
    Type: Application
    Filed: November 8, 2005
    Publication date: March 16, 2006
    Inventors: Noritaka Takebayashi, Yoji Takanami, Yasushi Kobiki, Masahiko Ando
  • Publication number: 20060051920
    Abstract: An information memory device capable of reading and writing of information by mechanical operation of a floating gate layer, in which a gate insulation film has a cavity (6), and a floating gate layer (5) having two stable deflection states in the cavity (6), the state stabilized by deflecting toward the channel side of transistor, and the state stabilized by deflecting toward the gate (7) side, writing and reading of information can be made by changing the stable deflection state of the floating gate layer (5) by Coulomb interactive force between the electrons (or positive holes 8) accumulated in the floating gate layer (5) and external electric field, and by reading the channel current change based on the state of the floating gate layer (5).
    Type: Application
    Filed: November 28, 2003
    Publication date: March 9, 2006
    Inventors: Shinya Yamaguchi, Masahiko Ando, Toshikazu Shimada, Natsuki Yokoyama, Shunri Oda, Nobuyoshi Koshida
  • Publication number: 20060032720
    Abstract: A hydraulic power transmission is provided with a frictional engagement element as a lock-up clutch between a hydraulic power transmission chamber, housing a pump impeller and a turbine runner, and a servo oil chamber of the lock-up clutch. A lock-up oil passage that supplies lock-up hydraulic pressure to the servo oil chamber is connected to a hydraulic pressure supply circuit that is used in common with a circulation oil passage that supplies hydraulic pressure for circulation to the hydraulic power transmission chamber. An orifice is disposed in the circulation oil passage. It is thus possible to perform lock-up with different supply pressures. A common oil supply for the lock-up oil passage and the circulation oil passage is provided, for example, by disposing a converting circuit that adapts an oil passage connection to hydraulic transmissions with different types of lock-up clutches.
    Type: Application
    Filed: August 10, 2005
    Publication date: February 16, 2006
    Applicant: AISIN AW CO., LTD.
    Inventors: Masahiko Ando, Hideyuki Aoki, Hiroyuki Tsukamoto, Akira Fukatsu, Atsushi Mori, Akira Matsuo, Hideaki Furuta
  • Publication number: 20060024494
    Abstract: An object of the present invention is to provide a pressure-sensitive adhesive composition which is excellent in antistatic property of a non-electrification-prevented adherend (subject to be protected) upon peeling, and has reduced stainability in an adherend and is excellent in adhesion reliance, and electrification preventing pressure-sensitive adhesive sheets using the same. There is provided a pressure-sensitive composition comprising an ionic liquid, and a (meth)acryl-based polymer containing, as a monomer component, 0.1 to 100% by weight of a (meth)acrylic acid alkylene oxide. In addition, there is provided a pressure-sensitive composition comprising an ionic liquid, and a polymer containing, as a monomer component, 0.5 to 30% by weight of a nitrogen-containing monomer and having a glass transition temperature Tg of no higher than 0° C. Furthermore, there is provided a pressure-sensitive composition comprising an ionic liquid, and a (meth)acryl-based polymer containing, as a monomer component, 0.
    Type: Application
    Filed: July 25, 2005
    Publication date: February 2, 2006
    Inventors: Tatsumi Amano, Natsuki Kobayashi, Masahiko Ando
  • Publication number: 20050266238
    Abstract: The present invention provides a pressure-sensitive adhesive which can prevent electrification of a non-electrification-prevented adherend upon peeling, suppresses occurrence of peeling off even with time or via treatment under a high temperature, and is excellent in adhesion reliance, as well as an antistatic pressure-sensitive adhesive sheet, and surface protecting film using this. The pressure-sensitive adhesive composition of the present invention contains an ionic liquid, and a polymer having a glass transition temperature of Tg of 0° C. or lower as a base polymer, as well as an ethylene oxide group-containing compound and/or a surfactant.
    Type: Application
    Filed: May 31, 2005
    Publication date: December 1, 2005
    Inventors: Tatsumi Amano, Natsuki Kobayashi, Masahiko Ando, Kazuhito Okumura
  • Publication number: 20050256251
    Abstract: An object of the present invention is to provide a surface protecting film which reduces staining on an adherend (subject to be protected) when applied to a surface protecting film of plastic products, and prevents electrification on an adherend (subject to be protected) which has not been electrification-prevented when a surface protecting film is peeled. There is provided a pressure-sensitive adhesive composition, which comprises a (meth)acryl-based polymer containing, as a main component, a (meth)acryl-based monomer having an alkyl group of a carbon number of 6 to 14, a polyether polyol compound and an alkali metal salt, wherein an acid value of the (meth)acryl-based polymer is 1.0 or lower, and the alkali metal is contained at an amount of less than 0.1 part by weight relative to 100 parts by weight of the (meth)acryl-based polymer.
    Type: Application
    Filed: May 13, 2005
    Publication date: November 17, 2005
    Inventors: Tatsumi Amano, Masahiko Ando