Patents by Inventor Yuzuru Chika

Yuzuru Chika 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: 20050094547
    Abstract: In Two-dimensional optical Compensation Exposure method, Beam 1, which has an intensity not less than a sensitivity of a photoresist layer and has a predetermined irradiation timing of exposed patterns, is radiated onto a predetermined area of the photoresist, and Beam 2, which has an intensity less than the sensitivity of the photoresist layer and has an irradiation timing of exposed patterns opposite to the predetermined timing, is radiated onto an area different from the predetermined area. Beam 2, which has the intensity less than the sensitivity of the photoresist layer, is radiated onto both sides P/P (2 T) in a disk radial direction of an area in which a shortest mark P22 is formed. The pit width is uniform irrelevant to the pit length. Further, it is possible to form the pit having a width shorter than a pit length. Therefore, it is possible to realize a high density.
    Type: Application
    Filed: October 22, 2004
    Publication date: May 5, 2005
    Applicant: HITACHI MAXELL, LTD.
    Inventors: Toshinori Sugiyama, Terufumi Yoshioka, Yuzuru Chika, Katsunori Miyata
  • Patent number: 6048653
    Abstract: The present invention provides a polymerizable composition for a color filter, which comprises a (meth)acrylate copolymer containing alicyclic (meth)acryloyl groups in its side chains, a compound having at least one ethylenically unsaturated double bond, a photopolymerization initiator and a colorant, a color filter obtained by coating the composition on a glass substrate, followed by exposure and development; and a method for producing a color filter, which comprises coating the composition on a glass substrate, followed by exposure and development.The polymerizable composition of the present invention is highly sensitive and excellent in chemical resistance. Accordingly, according to the present invention, it is possible to produce a color filter of a high quality without a protective layer such as an oxygen-shielding film.
    Type: Grant
    Filed: January 21, 1998
    Date of Patent: April 11, 2000
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Tameichi Ochiai, Ryuichiro Takasaki, Noriko Endou, Yuzuru Chika
  • Patent number: 5916713
    Abstract: The present invention provides a polymerizable composition for a color filter, which comprises a (meth)acrylate copolymer containing alicyclic (meth)acryloyl groups in its side chains, a compound having at least one ethylenically unsaturated double bond, a photopolymerization initiator and a colorant, a color filter obtained by coating the composition on a glass substrate, followed by exposure and development; and a method for producing a color filter, which comprises coating the composition on a glass substrate, followed by exposure and development.The polymerizable composition of the present invention is highly sensitive and excellent in chemical resistance. Accordingly, according to the present invention, it is possible to produce a color filter of a high quality without a protective layer such as an oxygen-shielding film.
    Type: Grant
    Filed: September 25, 1996
    Date of Patent: June 29, 1999
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Tameichi Ochiai, Ryuichiro Takasaki, Noriko Endou, Yuzuru Chika
  • Patent number: 5800952
    Abstract: A photopolymerizable composition for a color filter, which comprises a photopolymerization initiator system, a compound having at least one ethylenically unsaturated double bond, a colorant, and a phosphoric (meth)acrylate compound and/or an organic carboxylic anhydride having a molecular weight of at most 800, wherein the content of the colorant is from 20 to 90 wt % based on the total solid content.
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: September 1, 1998
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Toshiyuki Urano, Ryuichiro Takasaki, Jiro Kamimura, Shingo Ikeda, Noriko Endo, Yuzuru Chika, Tameichi Ochiai