Patents by Inventor Shuji Imazeki

Shuji Imazeki 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).

  • Publication number: 20160377926
    Abstract: Various layer separation states are generated by the combination of a polyamide acid ester and a polyamide acid and a long residual image characteristic cannot be further improved merely by combining them. A liquid crystal display device comprises a substrate, a liquid crystal layer, and an orientation film placed between the substrate and the liquid crystal layer. The orientation film comprises a polyimide precursor having two or more components. In the polyimide precursor, an octanol-water partition coefficient is defined as log P and the difference in log P (? log P) between the two components having most distant log Ps is set so as to fall within a prescribed range.
    Type: Application
    Filed: September 13, 2016
    Publication date: December 29, 2016
    Inventors: Masaki MATSUMORI, Shuji IMAZEKI, Yasushi TOMIOKA, Noboru KUNIMATSU
  • Patent number: 9470930
    Abstract: Various layer separation states are generated by the combination of a polyamide acid ester and a polyamide acid and a long residual image characteristic cannot be further improved merely by combining them. A liquid crystal display device comprises a substrate, a liquid crystal layer, and an orientation film placed between the substrate and the liquid crystal layer. The orientation film comprises a polyimide precursor having two or more components. In the polyimide precursor, an octanol-water partition coefficient is defined as log P and the difference in log P (? log P) between the two components having most distant log Ps is set so as to fall within a prescribed range.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: October 18, 2016
    Assignee: Japan Display Inc.
    Inventors: Masaki Matsumori, Shuji Imazeki, Yasushi Tomioka, Noboru Kunimatsu
  • Patent number: 8013327
    Abstract: A thin-film transistor includes an insulating substrate, a source electrode, and a drain electrode, disposed over the top of the insulating substrate, a semiconductor layer electrically continuous with the source electrode, and the drain electrode, respectively, a gate dielectric film formed over the top of at least the semiconductor layer; and a gate electrode disposed over the top of the gate dielectric film so as to overlap the semiconductor layer. Further, a first bank insulator is formed so as to overlie the source electrode, a second bank insulator is formed so as to overlie the drain electrode, and the semiconductor layer, the gate dielectric film, and the gate electrode are embedded in a region between the first bank insulator, and the second bank insulator.
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: September 6, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Masahiro Kawasaki, Masaaki Fujimori, Takeo Shiba, Shuji Imazeki, Tadashi Arai
  • Patent number: 7993820
    Abstract: A liquid film applicator means can apply a photosensitive lyophobic film 18 to a substrate 16. An exposure unit 10 is placed on the back side of the substrate and forms the lyophobic film applied on the substrate into a pattern in alignment with gate electrodes 13. A dropping unit 55 drops a test liquid to a surface of the substrate having a pattern of the lyophobic film formed by the exposure means. A measuring means 58 detects the droplet dropped by the dropping unit. A determining means determines whether the pattern of the lyophobic film formed by the exposure means is proper or not based on the droplet detected by the detecting means.
    Type: Grant
    Filed: July 11, 2007
    Date of Patent: August 9, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Tomohiro Inoue, Masahiko Ando, Shuji Imazeki
  • Publication number: 20100090220
    Abstract: The present invention aims at providing a high-performance semiconductor device such as display, IC tag, sensor or the like at a low cost by using an organic thin film transistor most members of which can be formed by printing, as a switching element. The present invention relates to a thin film transistor composed of members on a dielectric substrate, which are a gate electrode, a dielectric film, source/drain electrodes, and a semiconductor layer, wherein on said semiconductor layer there are formed at least two passivation films of a first passivation film capping said semiconductor layer to protect it and a second passivation film covering larger area than that of said first passivation film to protect all of said members.
    Type: Application
    Filed: December 15, 2009
    Publication date: April 15, 2010
    Applicant: HITACHI, LTD.
    Inventors: Masahiro KAWASAKI, Shuji Imazeki, Masahiko Ando, Yoshifumi Sekiguchi, Shoichi Hirota
  • Publication number: 20090294852
    Abstract: A thin-film transistor includes an insulating substrate, a source electrode, and a drain electrode, disposed over the top of the insulating substrate, a semiconductor layer electrically continuous with the source electrode, and the drain electrode, respectively, a gate dielectric film formed over the top of at least the semiconductor layer; and a gate electrode disposed over the top of the gate dielectric film so as to overlap the semiconductor layer. Further, a first bank insulator is formed so as to overlie the source electrode, a second bank insulator is formed so as to overlie the drain electrode, and the semiconductor layer, the gate dielectric film, and the gate electrode are embedded in a region between the first bank insulator, and the second bank insulator.
    Type: Application
    Filed: April 24, 2009
    Publication date: December 3, 2009
    Inventors: Masahiro Kawasaki, Masaaki Fujimori, Takeo Shiba, Shuji Imazeki, Tadashi Arai
  • Publication number: 20080036698
    Abstract: A display arranged with, in a matrix way, signal lines for providing brightness information to each of pixels, and scanning lines for selecting, in a predetermined cycle, pixels to be provided with brightness information; intake of the brightness information to each of the pixels being executed by intake of signal voltage of the signal lines via thin-film transistors in each of said pixels, in selecting the scanning lines connected with each of the pixels; and having pixels of n-lines and m-rows, by which the brightness information taken into each of the pixels is retained by capacity thereof, even after the scanning lines connected with each of the pixels become a non-selection state, wherein each of the pixels of each line is provided with at least one semiconductor layer that is common between each of the pixels, and the semiconductor layer is formed in parallel to said signal lines.
    Type: Application
    Filed: August 7, 2007
    Publication date: February 14, 2008
    Inventors: Masahiro Kawasaki, Masahiko Ando, Takeo Shiba, Shuji Imazeki, Masaaki Fujimori, Hideyuki Matsuoka
  • Publication number: 20080012013
    Abstract: A liquid film applicator means can apply a photosensitive lyophobic film 18 to a substrate 16. An exposure unit 10 is placed on the back side of the substrate and forms the lyophobic film applied on the substrate into a pattern in alignment with gate electrodes 13. A dropping unit 55 drops a test liquid to a surface of the substrate having a pattern of the lyophobic film formed by the exposure means. A measuring means 58 detects the droplet dropped by the dropping unit. A determining means determines whether the pattern of the lyophobic film formed by the exposure means is proper or not based on the droplet detected by the detecting means.
    Type: Application
    Filed: July 11, 2007
    Publication date: January 17, 2008
    Inventors: Tomohiro Inoue, Masahiko Ando, Shuji Imazeki
  • 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
  • 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
  • Publication number: 20050211975
    Abstract: The present invention aims at providing a high-performance semiconductor device such as display, IC tag, sensor or the like at a low cost by using an organic thin film transistor most members of which can be formed by printing, as a switching element. The present invention relates to a thin film transistor composed of members on a dielectric substrate, which are a gate electrode, a dielectric film, source/drain electrodes, and a semiconductor layer, wherein on said semiconductor layer there are formed at least two passivation films of a first passivation film capping said semiconductor layer to protect it and a second passivation film covering larger area than that of said first passivation film to protect all of said members.
    Type: Application
    Filed: February 15, 2005
    Publication date: September 29, 2005
    Inventors: Masahiro Kawasaki, Shuji Imazeki, Masahiko Ando, Yoshifumi Sekiguchi, Shoichi Hirota
  • Publication number: 20050056897
    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: Application
    Filed: February 26, 2004
    Publication date: March 17, 2005
    Inventors: Masahiro Kawasaki, Shuji Imazeki, Masahiko Ando
  • Patent number: 6328426
    Abstract: A printer device includes a plurality of discharge electrodes provided in a slit to which ink containing charged pigment particles is supplied, a plurality of opposing electrodes opposing the plurality of discharge electrodes, a pulse electric field applicator for forming a pulse electric field between the plurality of discharge electrodes and the plurality of opposing electrodes, and auxiliary electrodes. The auxiliary electrodes are provided at both sides of respective ones of the plurality of discharge electrodes, and a high or low potential is applied to the auxiliary electrodes so as to cancel out an electric interaction between respective ones of the plurality of discharge electrodes.
    Type: Grant
    Filed: October 27, 1999
    Date of Patent: December 11, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Lee Chahn, Hideki Shinohara, Shigetaka Fujiwara, Shuji Imazeki, Seiji Yonekura, Yoshiharu Nagae
  • Patent number: 6296917
    Abstract: A lubricating film is provided for a magnetic disk having a data region and a CSS region formed on its surface. The lubricating film ensures low stiction and good resistance to contact sliding in the data region and also ensures good CSS durability in the CSS region. Therefore, it is possible to provide a magnetic disk and a magnetic recording/reproducing device which do not cause problems with sliding between the magnetic head and the magnetic disk while the apparatus is running normally and even when the apparatus stops accidentally. The lubricating film formed in the data region of the magnetic disk is firmly fixed to the surface of the magnetic disk and is hardly liable to stiction. In addition, it is thick enough to ensure good durability even in the case of contact sliding.
    Type: Grant
    Filed: April 17, 1998
    Date of Patent: October 2, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Takayuki Nakakawaji, Mitsuyoshi Shouji, Tomoe Takamura, Hiroshi Sasaki, Shuji Imazeki, Yutaka Ito
  • Patent number: 5985403
    Abstract: A magnetic recording medium comprising a non-magnetic substrate and a magnetic layer and a protective layer which are formed on the non-magnetic substrate in that order, wherein a substance(s) as a single component or a plurality of components, which constitute a liquid continuously supplied to the surface of said protective layer, are adsorbed on or react with the surface of said protective layer to form a lubricating film having low frictional properties and low wearing-out properties. The present invention can realize negligible friction and wear resistance even in severe sliding at a very slightly kept-off or completely contacted state by continuous supply of a liquid lubricant prepared by adding a fluoro compound and an extreme pressure agent or an oiliness agent to a solvent to the surface of a disc, and can provide a magnetic recording reproducer having excellent sliding-resistant characteristics.
    Type: Grant
    Filed: March 18, 1994
    Date of Patent: November 16, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Takayuki Nakakawaji, Mitsuyoshi Shoji, Tomoe Takamura, Shuji Imazeki, Yutaka Ito, Hisashi Morooka, Yuko Murakami, Juichi Arai
  • Patent number: 5835305
    Abstract: A magnetic storage apparatus includes a substantially non-flexible magnetic recording medium, a magnetic head slider having a reading/writing element mounted therein and liquid lubricant provided on the surface of the magnetic recording medium. The liquid lubricant is a liquid in a Newtonian range having a viscosity which is substantially constant irrespective of a shear rate or a liquid having the property that the actual viscosity is increased with increase of the shear rate. The magnetic head slider maintains a gap between the slider and the magnetic recording medium to perform reading and writing while being moved on the liquid lubricant intermittently or continuously in a contact manner with the liquid lubricant. There is provided a device for maintaining a constant flying height even if a movement speed is varied, which flying height is represented by the size of the gap.
    Type: Grant
    Filed: December 6, 1994
    Date of Patent: November 10, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Tetsuya Hamaguchi, Yoshihiro Shiroishi, Yukio Kato, Masaaki Matsumoto, Hiromitsu Tokisue, Takayuki Nakakawaji, Shuji Imazeki
  • Patent number: 5820964
    Abstract: The present invention is aimed at providing a magnetic disk and a magnetic disk apparatus both of which have a high performance lubricating film which makes continuous sliding endurance and low adhesiveness compatible, and a lubricating film having a self repairing function which makes it possible to recombine scratched off lubricating agent from the magnetic disk surface by sliding with a head onto the magnetic disk surface. The lubricating film comprises at least two kinds of lubricating agents each of which forms an individual layer, the layers being laminated. An adhesion enhancing layer is formed between a magnetic film and a lubricating agent at the surface of the magnetic disk, and the adhesion enhancing layer is fixed onto the magnetic film surface. Then, the adhesion enhancing layer and the lubricating agent are combined.
    Type: Grant
    Filed: November 7, 1995
    Date of Patent: October 13, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Takayuki Nakakawaji, Shuji Imazeki, Yutaka Ito, Yuko Morita, Mitsuyoshi Shouji, Hisashi Morooka, Heigo Ishihara, Hiroyuki Matsumoto, Tetsuya Hamaguchi, Hiroshi Sasaki, Tomoyuki Hamada
  • Patent number: 5414072
    Abstract: The invention relates to a monoclonal antibody which binds to octopus rhodopsin and octopus metarhodopsin wherein said monoclonal antibody binds with higher affinity to metarhodopsin than to rhodopsin and does not inhibit rhodopsin-metarhodopsin interconversion upon exposure to blue or red light. The monoclonal antibody binds to a peptide having the sequence Val-Ile-Gly-Arg-Pro-Met-Ala-Ala-Ser-Lys-Lys-Met-Ser. The photochemical reaction of rhodopsin thin layers may be detected using the anti-rhodopsin monoclonal antibodies of the invention.
    Type: Grant
    Filed: September 27, 1990
    Date of Patent: May 9, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Tadashi Ishibashi, Hiroaki Kezuka, Saeko Yoshino, Norio Shimizu, Motoyuki Tsuda, Shuji Imazeki
  • Patent number: 5357357
    Abstract: An organic thin film obtained by spreading an organic substance comprising a polymer on a liquid surface, and compressing the spread substance unidirectionally or in two directions facing each other, in which organic thin film the principal chain of said polymer in the surface of the film has been oriented perpendicularly to the direction of the compression, and a method for producing the same. A liquid crystal display device comprising substrates, a polarizer, electrodes at least one of which is transparent, if necessary semiconductor substrates at least one of which is transparent, an orientation-controlling film and a liquid crystal layer, among which at least one of the polarizer, electrode, semiconductor substrate, orientation-controlling film and liquid crystal layer comprises an organic thin film. The orientation-controlling film may be an organic thin film in which the film-forming molecules have been uniformly oriented in a particular direction in the surface of the film.
    Type: Grant
    Filed: September 19, 1990
    Date of Patent: October 18, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Shuji Imazeki, Yasushi Tomioka, Naoki Tanaka, Yoshio Taniguchi, Hideaki Kawakami, Katsumi Kondo, Masami Yamasaki
  • Patent number: 5293567
    Abstract: In an optical recording method which utilizes hole burning, a plurality of sorts of light absorption centers having different properties are caused to coexist or to exist in the form of layers, thereby to remove the problem that, although the multiplicity of recording is high, the spacial recording density is low, so the overall recording density is low. Accordingly, the present invention can provide an optical recording method of very high recording density.
    Type: Grant
    Filed: September 24, 1992
    Date of Patent: March 8, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Motoyasu Terao, Masahiro Ojima, Yoshio Taniguchi, Yasushi Tomioka, Shuji Imazeki