Patents by Inventor Masahiro Murayama

Masahiro Murayama 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: 20190020174
    Abstract: A semiconductor light emitting device includes a substrate a semiconductor light emitting element that is disposed on the substrate and that emits light along a direction substantially parallel to a main surface of the substrate a wavelength conversion element that is disposed on a light emitting side of the semiconductor light emitting element, that absorbs a portion of the light emitted from the semiconductor light emitting element, and that emits light having a wavelength different from that of the absorbed light; and a holding member that is disposed on the substrate and holds the wavelength conversion element.
    Type: Application
    Filed: December 15, 2016
    Publication date: January 17, 2019
    Inventors: HIDEKAZU KAWANISHI, MASAHIRO MURAYAMA
  • Publication number: 20180175389
    Abstract: The present invention provides a positive-electrode active material for non-aqueous secondary battery comprising a sodium transition metal composite oxide represented by Formula: NaxFe1-yMyO2, wherein 0.4?x?0.7, 0.25?y<1.0, and M is at least one element selected from the group consisting of manganese, cobalt and nickel, the sodium transition metal composite oxide having a crystal structure substantially composed of P63/mmc alone.
    Type: Application
    Filed: February 13, 2018
    Publication date: June 21, 2018
    Applicant: NICHIA CORPORATION
    Inventors: Hideaki YOSHIWARA, Tsutomu YAMADA, Masahiro MURAYAMA
  • Patent number: 9356424
    Abstract: There is provided a semiconductor light emitting element that is excellent in reliability and is capable of being driven by a lower voltage and a semiconductor light emitting device that includes the semiconductor light emitting element. The semiconductor light emitting element includes: a semiconductor layer; an electrode layer; a metal layer that contains a hydrogen storage metal; and a plated layer in order.
    Type: Grant
    Filed: July 10, 2014
    Date of Patent: May 31, 2016
    Assignee: SONY CORPORATION
    Inventors: Masahiro Murayama, Yoshinori Ishiai, Yuichiro Kikuchi
  • Publication number: 20150023379
    Abstract: There is provided a semiconductor light emitting element that is excellent in reliability and is capable of being driven by a lower voltage and a semiconductor light emitting device that includes the semiconductor light emitting element. The semiconductor light emitting element includes: a semiconductor layer; an electrode layer; a metal layer that contains a hydrogen storage metal; and a plated layer in order.
    Type: Application
    Filed: July 10, 2014
    Publication date: January 22, 2015
    Inventors: Masahiro Murayama, Yoshinori Ishiai, Yuichiro Kikuchi
  • Publication number: 20150004491
    Abstract: The present invention provides a positive-electrode active material for non-aqueous secondary battery comprising a sodium transition metal composite oxide represented by Formula: NaxFe1-yMyO2, wherein 0.4?x?0.7, 0.25?y<1.0, and M is at least one element selected from the group consisting of manganese, cobalt and nickel, the sodium transition metal composite oxide having a crystal structure substantially composed of P63/mmc alone.
    Type: Application
    Filed: June 27, 2014
    Publication date: January 1, 2015
    Inventors: Hideaki YOSHIWARA, Tsutomu YAMADA, Masahiro MURAYAMA
  • Patent number: 8422527
    Abstract: A nitride based semiconductor device includes: an n-type cladding layer; an n-type GaN based guide layer placed on the n-type cladding layer; an active layer placed on the n-type GaN based guide layer; a p-type GaN based guide layer placed on the active layer; an electron block layer placed on the p-type GaN based guide layer; a stress relaxation layer placed on the electron block layer; and a p-type cladding layer placed on the stress relaxation layer, and the nitride based semiconductor device alleviates the stress occurred under the influence of the electron block layer, does not affect light distribution by the electron block layer, reduces threshold current, can suppress the degradation of reliability, can suppress degradation of the emitting end surface of the laser beam, can improve the far field pattern, and is long lasting, and fabrication method of the device is also provided.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: April 16, 2013
    Assignee: Rohm Co., Ltd.
    Inventors: Daisuke Nakagawa, Yoshinori Tanaka, Masahiro Murayama, Takao Fujimori, Shinichi Kohda
  • Publication number: 20120140785
    Abstract: A nitride based semiconductor device includes: an n-type cladding layer; an n-type GaN based guide layer placed on the n-type cladding layer; an active layer placed on the n-type GaN based guide layer; a p-type GaN based guide layer placed on the active layer; an electron block layer placed on the p-type GaN based guide layer; a stress relaxation layer placed on the electron block layer; and a p-type cladding layer placed on the stress relaxation layer, and the nitride based semiconductor device alleviates the stress occurred under the influence of the electron block layer, does not affect light distribution by the electron block layer, reduces threshold current, can suppress the degradation of reliability, can suppress degradation of the emitting end surface of the laser beam, can improve the far field pattern, and is long lasting, and fabrication method of the device is also provided.
    Type: Application
    Filed: February 13, 2012
    Publication date: June 7, 2012
    Inventors: Daisuke NAKAGAWA, Yoshinori TANAKA, Masahiro Murayama, Takao FUJIMORI, Shinichi KOHDA
  • Patent number: 8144743
    Abstract: A nitride based semiconductor device includes: an n-type cladding layer; an n-type GaN based guide layer placed on the n-type cladding layer; an active layer placed on the n-type GaN based guide layer; a p-type GaN based guide layer placed on the active layer; an electron block layer placed on the p-type GaN based guide layer; a stress relaxation layer placed on the electron block layer; and a p-type cladding layer placed on the stress relaxation layer, and the nitride based semiconductor device alleviates the stress occurred under the influence of the electron block layer, does not affect light distribution by the electron block layer, reduces threshold current, can suppress the degradation of reliability, can suppress degradation of the emitting end surface of the laser beam, can improve the far field pattern, and is long lasting, and fabrication method of the device is also provided.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: March 27, 2012
    Assignee: Rohm Co., Ltd.
    Inventors: Daisuke Nakagawa, Yoshinori Tanaka, Masahiro Murayama, Takao Fujimori, Shinichi Kohda
  • Publication number: 20100008391
    Abstract: A nitride based semiconductor device includes: an n-type cladding layer; an n-type GaN based guide layer placed on the n-type cladding layer; an active layer placed on the n-type GaN based guide layer; a p-type GaN based guide layer placed on the active layer; an electron block layer placed on the p-type GaN based guide layer; a stress relaxation layer placed on the electron block layer; and a p-type cladding layer placed on the stress relaxation layer, and the nitride based semiconductor device alleviates the stress occurred under the influence of the electron block layer, does not affect light distribution by the electron block layer, reduces threshold current, can suppress the degradation of reliability, can suppress degradation of the emitting end surface of the laser beam, can improve the far field pattern, and is long lasting, and fabrication method of the device is also provided.
    Type: Application
    Filed: March 4, 2009
    Publication date: January 14, 2010
    Applicant: ROHM CO., LTD.
    Inventors: Daisuke Nakagawa, Yoshinori Tanaka, Masahiro Murayama, Takao Fujimori, Shinichi Kohda
  • Publication number: 20090122822
    Abstract: A method for manufacturing a semiconductor device includes setting cut lines in parallel to a normal direction of a (1-100) plane orthogonal to the principal plane and in parallel to a normal direction of a (11-20) plane orthogonal to the (1-100) plane; forming, along the cut line parallel to the normal direction of the (1-100) plane, a trench from the principal plane of the semiconductor layer to a midpoint of a boundary plane between the semiconductor layer and the substrate; and cutting the wafer along the cut lines to divide the wafer into the plurality of semiconductor device where four side faces which are nonpolar planes orthogonal to the principal plane are set adjacent to the principal plane.
    Type: Application
    Filed: September 12, 2008
    Publication date: May 14, 2009
    Applicant: ROHM CO., LTD.
    Inventor: Masahiro Murayama
  • Publication number: 20090090923
    Abstract: A semiconductor light-emitting device and method for manufacturing the semiconductor light-emitting device includes a mask layer etching process on first and second mask layers provided on a Group-III nitride-based compound semiconductor substrate, the mask layer with a higher etching rate being closer to the p-type semiconductor layer; a semiconductor layer etching process; a side-etching process that selectively etches the side of the mask layer with the high etching rate to define a groove portion with a portion of the p-type semiconductor layer exposed; a ZrO2 film forming process that forms a ZrO2 film so as to cover the exposed p-type semiconductor layer; an Al2O3 film forming process that forms an Al2O3 film so as to cover the ZrO2 film; a mask layer removing process; and an electrode layer forming process.
    Type: Application
    Filed: December 5, 2008
    Publication date: April 9, 2009
    Applicant: ROHM CO., LTD.
    Inventor: Masahiro MURAYAMA
  • Patent number: 7476903
    Abstract: A semiconductor light-emitting device and method for manufacturing the semiconductor light-emitting device includes a mask layer etching process on first and second mask layers provided on a Group-III nitride-based compound semiconductor substrate, the mask layer with a higher etching rate being closer to the p-type semiconductor layer; a semiconductor layer etching process; a side-etching process that selectively etches the side of the mask layer with the high etching rate to define a groove portion with a portion of the p-type semiconductor layer exposed; a ZrO2 film forming process that forms a ZrO2 film so as to cover the exposed p-type semiconductor layer; an Al2O3 film forming process that forms an Al2O3 film so as to cover the ZrO2 film; a mask layer removing process; and an electrode layer forming process.
    Type: Grant
    Filed: August 11, 2006
    Date of Patent: January 13, 2009
    Assignee: Rohm Co., Ltd.
    Inventor: Masahiro Murayama
  • Publication number: 20070232084
    Abstract: A manufacturing method for a semiconductor device according to the present invention includes the steps of: growing a p-type contact layer formed of a p-type GaN layer; forming an insulating film on a surface of the p-type contact layer, on which a p-side electrode is to be formed, by coating an insulating film material on the surface and thereafter baking the insulating film material; and annealing the p-type semiconductor layer in a state where the insulating film is formed on the p-type contact layer.
    Type: Application
    Filed: March 22, 2007
    Publication date: October 4, 2007
    Inventor: Masahiro Murayama
  • Publication number: 20070037305
    Abstract: A semiconductor light-emitting device and method for manufacturing the semiconductor light-emitting device includes a mask layer etching process on first and second mask layers provided on a Group-III nitride-based compound semiconductor substrate, the mask layer with a higher etching rate being closer to the p-type semiconductor layer; a semiconductor layer etching process; a side-etching process that selectively etches the side of the mask layer with the high etching rate to define a groove portion with a portion of the p-type semiconductor layer exposed; a ZrO2 film forming process that forms a ZrO2 film so as to cover the exposed p-type semiconductor layer; an Al2O3 film forming process that forms an Al2O3 film so as to cover the ZrO2 film; a mask layer removing process; and an electrode layer forming process.
    Type: Application
    Filed: August 11, 2006
    Publication date: February 15, 2007
    Applicant: ROHM CO., LTD.
    Inventor: Masahiro MURAYAMA
  • Publication number: 20070026550
    Abstract: A method of manufacturing a semiconductor light emitting apparatus according to the invention includes: the mask layer forming step of forming two mask layers in descending order of etching rates from a side near a p-type semiconductor layer; the mask layer etching step; the semiconductor layer etching step; the side etching step of selectively etching a side surface of a mask layer having a high etching rate to form a groove portion in the p-type semiconductor layer; the insulating film forming step of forming an insulating film so as to cover the p-type semiconductor layer; the mask layer removing step; and the electrode layer forming step. A semiconductor light emitting apparatus according to the invention includes: a substrate; an n-type semiconductor layer; an active layer; a p-type semiconductor layer on which a mesa portion projecting above the active layer is formed; an insulating film which covers the mesa portion to expose an upper surface of the mesa portion; and an electrode layer.
    Type: Application
    Filed: July 6, 2006
    Publication date: February 1, 2007
    Inventors: Masahiro Murayama, Daisuke Nakagawa, Shinichi Kohda, Toshio Nishida
  • Patent number: 6563961
    Abstract: The size and orientation of a document are detected by determining the length in the horizontal scanning direction and the length in the vertical scanning direction of the document to be read through a reader. According to the detection result, it is determined whether the image of the document needs to be rotated or not so as to satisfy a condition where a shortest dimension among the transmittable widths in the horizontal scanning direction, at which no part of the image is missing, occurs and the dimension in the vertical scanning direction is minimized. According to the determination result, the document image which has been read through the reader is registered in an image memory and the registered image data is read out to transmit it to a receiver through a telephone line.
    Type: Grant
    Filed: February 24, 1999
    Date of Patent: May 13, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masahiro Murayama
  • Patent number: 6433893
    Abstract: A document terminated by error due to communication error during the reception is retransmitted starting from the error page to complete the document. The received document is stored in a memory. Each document is assigned with a sending station ID and a document ID which are stored in a RAM. When the reception is terminated by error, the data received so far is stored for a predetermined time and if the retransmission is made within the predetermined time, it is linked to the previously stored received data.
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: August 13, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masahiro Murayama
  • Patent number: 5937106
    Abstract: The size and orientation of a document are detected by determining the length in the horizontal scanning direction and the length in the vertical scanning direction of the document to be read through a reader. According to the detection result, it is determined whether the image of the document needs to be rotated or not so as to satisfy a condition where a shortest dimension among the transmittable widths in the horizontal scanning direction, at which no part of the image is missing, occurs and the dimension in the vertical scanning direction is minimized. According to the determination result, the document image which has been read through the reader is registered in an image memory and the registered image data is read out to transmit it to a receiver through a telephone line.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: August 10, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masahiro Murayama
  • Patent number: 5519508
    Abstract: A communication apparatus detects an incoming-call during communication and rejects the incoming-call. If the apparatus detects the incoming-call during communication and rejects the incoming-call, delays calling for next transmission for a predetermined period after the current communication. If the apparatus detects the incoming-call within the predetermined period, it accepts the incoming-call. Thus, the apparatus can ensure an opportunity to accept an incoming-call without prolonging the entire communication time.
    Type: Grant
    Filed: November 2, 1994
    Date of Patent: May 21, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masahiro Murayama
  • Patent number: 5488483
    Abstract: An apparatus having the G4 method and the JPEG method allows for the selection of standard resolution (200 dpi.times.200 dp) or precision resolution (400 dpi.times.400 dpi) by using a resolution selection key of operation unit 26 in order to improve the operativity and extend the breadth of selection of image quality. For each selection of standard resolution or precision resolution, the resolution and code information for designating quantization table for use with JPEG are stored in RAM 16, with its memory area being backed up by a battery.
    Type: Grant
    Filed: September 27, 1994
    Date of Patent: January 30, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masahiro Murayama