Patents by Inventor Yasuharu Murakami

Yasuharu Murakami 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: 20160357102
    Abstract: In the method for forming a protective coat on an electrode for a touch panel according to the invention, a photosensitive layer comprising a photosensitive resin composition containing a binder polymer having a carboxyl group and an acid value of 30 to 120 mgKOH/g, a photopolymerizable compound having at least three ethylenic unsaturated groups, and a photopolymerization initiator, is formed on a base material having an electrode for a touch panel, prescribed sections of the photosensitive layer are cured by irradiation with active light rays and then the sections other than the prescribed sections are removed, to form a protective coat comprising the cured sections of the photosensitive resin composition covering all or a portion of the electrode.
    Type: Application
    Filed: August 18, 2016
    Publication date: December 8, 2016
    Inventors: Ikuo MUKAI, Yasuharu MURAKAMI, Naoki SASAHARA, Hiroshi YAMAZAKI
  • Patent number: 9488912
    Abstract: In the method for forming a protective coat on an electrode for a touch panel according to the invention, a photosensitive layer comprising a photosensitive resin composition containing a binder polymer having a carboxyl group and an acid value of 30 to 120 mgKOH/g, a photopolymerizable compound having at least three ethylenic unsaturated groups, and a photopolymerization initiator, is formed on a base material having an electrode for a touch panel, prescribed sections of the photosensitive layer are cured by irradiation with active light rays and then the sections other than the prescribed sections are removed, to form a protective coat comprising the cured sections of the photosensitive resin composition covering all or a portion of the electrode.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: November 8, 2016
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Ikuo Mukai, Yasuharu Murakami, Naoki Sasahara, Hiroshi Yamazaki
  • Publication number: 20160238942
    Abstract: The conductive pattern formation method according to the present invention comprises a step of providing a photosensitive conductive film including a conductive layer containing conductive fibers, a photosensitive resin layer containing a photosensitive resin and an inorganic filler, and a support film in this order, and laminating the conductive layer and the photosensitive resin layer on a base material such that the conductive layer side is closely bonded to the base material, and a step of exposing and developing the photosensitive resin layer and the conductive layer on the base material to form a conductive pattern.
    Type: Application
    Filed: August 28, 2014
    Publication date: August 18, 2016
    Inventors: Masahiko EBIHARA, Emiko OOTA, Yasuharu MURAKAMI, Hiroshi YAMAZAKI, Hiroyuki TANAKA
  • Publication number: 20160223906
    Abstract: The method for forming a resin cured film pattern according to the invention comprises a first step in which there is formed on a base material a photosensitive layer composed of a photosensitive resin composition comprising a binder polymer with a carboxyl group having an acid value of 75 mgKOH/g or greater, a photopolymerizable compound and a photopolymerization initiator, and having a thickness of 10 ?m or smaller, a second step in which prescribed sections of the photosensitive layer are cured by irradiation with active light rays, and a third step in which the sections of the photosensitive layer other than the prescribed sections are removed to form a cured film pattern of the prescribed sections of the photosensitive layer, wherein the photosensitive resin composition comprises an oxime ester compound and/or a phosphine oxide compound as the photopolymerization initiator.
    Type: Application
    Filed: March 7, 2016
    Publication date: August 4, 2016
    Inventors: Yasuharu MURAKAMI, Hiroshi YAMAZAKI, Yoshimi IGARASHI, Naoki SASAHARA, Ikuo MUKAI
  • Publication number: 20160216790
    Abstract: A laminate which includes a substrate 230, conductive fibers 221 and a resin layer, wherein, in said laminate, a ratio of increase in resistance after irradiation with light emitted from a xenon lamp at an intensity of 60 W/m2 (integrated value of spectral irradiance at a wavelength of 300 nm to 400 nm) for 300 hours is 20% or less.
    Type: Application
    Filed: October 15, 2014
    Publication date: July 28, 2016
    Inventors: Masahiko EBIHARA, Emiko OOTA, Yasuharu MURAKAMI
  • Publication number: 20160216608
    Abstract: A photosensitive resin composition comprises a component (A): a resin having a phenolic hydroxyl group; a component (B): an aliphatic compound having two or more functional groups, the functional groups being one or more group selected from an acryloyloxy group, a methacryloyloxy group, a glycidyloxy group and a hydroxyl group; a component (C): a photosensitive acid generator; and a component (D): an inorganic filler having an average particle diameter of 100 nm or less.
    Type: Application
    Filed: September 29, 2014
    Publication date: July 28, 2016
    Inventors: Kenichi IWASHITA, Tetsuya KATO, Masahiko EBIHARA, Yasuharu MURAKAMI
  • Patent number: 9348223
    Abstract: The method for forming a resin cured film pattern according to the invention comprises a first step in which there is formed on a base material a photosensitive layer composed of a photosensitive resin composition comprising a binder polymer with a carboxyl group having an acid value of 75 mgKOH/g or greater, a photopolymerizable compound and a photopolymerization initiator, and having a thickness of 10 ?m or smaller, a second step in which prescribed sections of the photosensitive layer are cured by irradiation with active light rays, and a third step in which the sections of the photosensitive layer other than the prescribed sections are removed to form a cured film pattern of the prescribed sections of the photosensitive layer, wherein the photosensitive resin composition comprises an oxime ester compound and/or a phosphine oxide compound as the photopolymerization initiator.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: May 24, 2016
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Yasuharu Murakami, Hiroshi Yamazaki, Yoshimi Igarashi, Naoki Sasahara, Ikuo Mukai
  • Publication number: 20150323867
    Abstract: Provided is a photosensitive resin composition comprising (A) a resin having a phenolic hydroxyl group; (B) an aliphatic or alicyclic epoxy compound having two or more oxirane rings; (C) a photosensitive acid generator; and (D) a solvent; wherein the photosensitive resin composition comprises 20 to 70 parts by mass of the component (B) relative to 100 parts by mass of the component (A).
    Type: Application
    Filed: November 5, 2013
    Publication date: November 12, 2015
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Kenichi IWASHITA, Yasuharu MURAKAMI, Hanako YORI, Tetsuya KATO
  • Publication number: 20140377704
    Abstract: In the method for forming a protective coat on an electrode for a touch panel according to the invention, a photosensitive layer comprising a photosensitive resin composition containing a binder polymer having a carboxyl group and an acid value of 30 to 120 mgKOH/g, a photopolymerizable compound having at least three ethylenic unsaturated groups, and a photopolymerization initiator, is formed on a base material having an electrode for a touch panel, prescribed sections of the photosensitive layer are cured by irradiation with active light rays and then the sections other than the prescribed sections are removed, to form a protective coat comprising the cured sections of the photosensitive resin composition covering all or a portion of the electrode.
    Type: Application
    Filed: December 4, 2012
    Publication date: December 25, 2014
    Inventors: Ikuo Mukai, Yasuharu Murakami, Naoki Sasahara, Hiroshi Yamazaki
  • Publication number: 20140363767
    Abstract: The method for forming a resin cured film pattern according to the invention comprises a first step in which there is formed on a base material a photosensitive layer composed of a photosensitive resin composition comprising a binder polymer with a carboxyl group having an acid value of 75 mgKOH/g or greater, a photopolymerizable compound and a photopolymerization initiator, and having a thickness of 10 ?m or smaller, a second step in which prescribed sections of the photosensitive layer are cured by irradiation with active light rays, and a third step in which the sections of the photosensitive layer other than the prescribed sections are removed to form a cured film pattern of the prescribed sections of the photosensitive layer, wherein the photosensitive resin composition comprises an oxime ester compound and/or a phosphine oxide compound as the photopolymerization initiator.
    Type: Application
    Filed: December 4, 2012
    Publication date: December 11, 2014
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Yasuharu Murakami, Hiroshi Yamazaki, Yoshimi Igarashi, Naoki Sasahara, Ikuo Mukai
  • Publication number: 20140335350
    Abstract: The method for forming a protective coat on an electrode for a touch panel according to the invention comprises a first step in which a photosensitive layer comprising a photosensitive resin composition containing a binder polymer, a photopolymerizable compound and a photopolymerization initiator is provided on a base material having an electrode for a touch panel, a second step in which prescribed sections of the photosensitive layer are cured by irradiation with active light rays, and a third step in which the sections other than the prescribed sections of the photosensitive layer are removed to form a protective coat comprising the cured sections of the photosensitive layer covering all or a portion of the electrode, wherein the hydroxyl value of the photosensitive resin composition is no greater than 40 mgKOH/g.
    Type: Application
    Filed: December 4, 2012
    Publication date: November 13, 2014
    Inventors: Hiroyuki Tanaka, Yasuharu Murakami, Naoki Sasahara, Ikuo Mukai, Yoshimi Igarashi, Masahiko Ebihara, Hiroshi Yamazaki
  • Patent number: 8415081
    Abstract: The present invention discloses a photosensitive resin composition which comprises (A) a compound having a molecule with at least one thiirane ring and a total number of a thiirane ring and/or an epoxy ring of at least 2 in the molecule, and (B) a photo acid generator, said composition having a refractive index of at least 1.6, and a method of obtaining a high refractive index periodical structure which comprises subjecting the photosensitive resin composition to photolithography.
    Type: Grant
    Filed: June 17, 2004
    Date of Patent: April 9, 2013
    Assignees: Cornell Research Foundation, Inc., Hitachi Chemical Co., Ltd.
    Inventors: Christopher K. Ober, Yasuharu Murakami
  • Patent number: 7638254
    Abstract: Provided is a positive photosensitive resin composition which is advantageous not only in excellent sensitivity, resolution and adhesion, but also in excellent heat resistance even when the composition is cured by a low-temperature process at equal to or lower than 280° C., as well as low water absorption and capability to give a pattern with favorable configuration. The positive photosensitive resin composition contains: (a) alkaline aqueous solution-soluble polyamide having a polyoxazole precursor structure; (b) an o-quinonediazide compound; and (c) a latent acid generator which generates acid upon heating. The composition optionally further contains (d) a compound having a phenolic hydroxyl group or (e) a solvent.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: December 29, 2009
    Assignee: Hitachi Chemical Dupont Microsystems Ltd
    Inventors: Takashi Hattori, Yasuharu Murakami, Hiroshi Matsutani, Masayuki Ooe, Hajime Nakano
  • Publication number: 20090011364
    Abstract: Provided is a positive photosensitive resin composition which is advantageous not only in excellent sensitivity, resolution and adhesion, but also in excellent heat resistance even when the composition is cured by a low-temperature process at equal to or lower than 280° C., as well as low water absorption and capability to give a pattern with favorable configuration. The positive photosensitive resin composition contains: (a) alkaline aqueous solution-soluble polyamide having a polyoxazole precursor structure; (b) an o-quinonediazide compound; and (c) a latent acid generator which generates acid upon heating. The composition optionally further contains (d) a compound having a phenolic hydroxyl group or (e) a solvent.
    Type: Application
    Filed: September 10, 2008
    Publication date: January 8, 2009
    Inventors: Takashi HATTORI, Yasuharu Murakami, Hiroshi Matsutani, Masayuki Ooe, Hajime Nakano
  • Patent number: 7435525
    Abstract: Provided is a positive photosensitive resin composition which is advantageous not only in excellent sensitivity, resolution and adhesion, but also in excellent heat resistance even when the composition is cured by a low-temperature process at equal to or lower than 280° C., as well as low water absorption and capability to give a pattern with favorable configuration. The positive photosensitive resin composition contains: (a) alkaline aqueous solution-soluble polyamide having a polyoxazole precursor structure; (b) an o-quinonediazide compound; and (c) a latent acid generator which generates acid upon heating. The composition optionally further contains (d) a compound having a phenolic hydroxyl group or (e) a solvent.
    Type: Grant
    Filed: March 11, 2005
    Date of Patent: October 14, 2008
    Assignee: Hitachi Chemical Dupont Microsystems Ltd.
    Inventors: Takashi Hattori, Yasuharu Murakami, Hiroshi Matsutani, Masayuki Ooe, Hajime Nakano
  • Publication number: 20080038665
    Abstract: The present invention discloses a photosensitive resin composition which comprises (A) a compound having a molecule with at least one thiirane ring and a total number of a thiirane ring and/or an epoxy ring of at least 2 in the molecule, and (B) a photo acid generator, said composition having a refractive index of at least 1.6, and a method of obtaining a high refractive index periodical structure which comprises subjecting the photosensitive resin composition to photolithography.
    Type: Application
    Filed: June 17, 2004
    Publication date: February 14, 2008
    Inventors: Christopher K. Ober, Yasuharu Murakami
  • Patent number: 7220533
    Abstract: The present invention provides a photosensitive resin composition for laser scanning exposure, which satisfies the following formula (1): - 25 ? E 1 - E 0 E 0 × 100 ? 25 ( 1 ) wherein E0 represents an exposure amount in mJ/cm2 at which the photosensitive resin composition is cured at the 21st step of the density 1.00 of a 41-step step tablet having a density range from 0.00 to 2.00, a density step of 0.05, a tablet size of 20 mm×187 mm and a step size of 3 mm×12 mm, by irradiation with a full wavelength active light of a high pressure mercury lamp and E1 represents an exposure amount in mJ/cm2 at which the photosensitive resin composition after being left for 2 hours under 40 W non-ultraviolet white lamp is cured at the 21st step of the 41-step step tablet by irradiation with a full wavelength active light from a high pressure mercury lamp.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: May 22, 2007
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Yasuharu Murakami, Takahiro Hidaka
  • Publication number: 20050164124
    Abstract: The present invention provides a photosensitive resin composition for laser scanning exposure, which satisfies the following formula (1): - 25 ? E 1 - E 0 E 0 × 100 ? 25 ( 1 ) wherein E0 represents an exposure amount in mJ/cm2 at which the photosensitive resin composition is cured at the 21st step of the density 1.00 of a 41-step step tablet having a density range from 0.00 to 2.00, a density step of 0.05, a tablet size of 20 mm×187 mm and a step size of 3 mm×12 mm, by irradiation with a full wavelength active light of a high pressure mercury lamp and E1 represents an exposure amount in mJ/cm2 at which the photosensitive resin composition after being left for 2 hours under 40 W non-ultraviolet white lamp is cured at the 21st step of the 41-step step tablet by irradiation with a full wavelength active light from a high pressure mercury lamp.
    Type: Application
    Filed: March 21, 2005
    Publication date: July 28, 2005
    Applicant: Hitachi Chemical Co., Ltd.
    Inventors: Yasuharu Murakami, Takahiro Hidaka
  • Publication number: 20040038149
    Abstract: The present invention provides a photosensitive resin composition for laser scanning exposure, which satisfies the following formula (1): 1 - 25 ≦ E 1 - E 0 E 0 × 100 ≦ 25 ( 1 )
    Type: Application
    Filed: January 2, 2003
    Publication date: February 26, 2004
    Inventors: Yasuharu Murakami, Takahiro Hidaka