Patents by Inventor Yuji Ukuma

Yuji Ukuma 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: 7804677
    Abstract: An electronic component is provided which includes external electrodes having a multilayer structure of first and second sintered electrode layers that are densely sintered and have less possibility of causing poor appearance and decreased reliability in electrical connection. The external electrodes include a first sintered electrode layer and a second sintered electrode layer containing different metals. The first and second sintered electrode layers contain a borosilicate glass containing an alkali metal.
    Type: Grant
    Filed: June 2, 2009
    Date of Patent: September 28, 2010
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Yuji Ukuma
  • Publication number: 20090239096
    Abstract: An electronic component is provided which includes external electrodes having a multilayer structure of first and second sintered electrode layers that are densely sintered and have less possibility of causing poor appearance and decreased reliability in electrical connection. The external electrodes include a first sintered electrode layer and a second sintered electrode layer containing different metals. The first and second sintered electrode layers contain a borosilicate glass containing an alkali metal.
    Type: Application
    Filed: June 2, 2009
    Publication date: September 24, 2009
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventor: Yuji Ukuma
  • Patent number: 7558047
    Abstract: An electronic component is provided which includes external electrodes having a multilayer structure of first and second sintered electrode layers that are densely sintered and have less possibility of causing poor appearance and decreased reliability in electrical connection. Each external electrode includes a first sintered electrode layer and a second sintered electrode layer. The first sintered electrode layer contains a first borosilicate glass containing an alkali metal in which there is 85% to 95% by weight of silicon and 0.5% to 1.5% by weight of the alkali metal based on 100% by weight of all contained elements other than boron. The second sintered electrode layer contains a second borosilicate glass containing an alkali metal in which there is 65% to 80% by weight of silicon and 3.5% to 8.0% by weight of the alkali metal based on 100% by weight of all contained elements other than boron.
    Type: Grant
    Filed: February 14, 2005
    Date of Patent: July 7, 2009
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Yuji Ukuma
  • Patent number: 7510673
    Abstract: For mounting on a substrate by using an electroconductive adhesive, an electroconductive paste for forming an external electrode which has improved moisture resistance and which is resistant to occurrence of external-electrode peeling, as well as a ceramic electronic component including the electroconductive paste are provided. The electroconductive paste includes a base-metal electroconductive powder, first glass frit, and an organic vehicle, wherein the first glass frit has a B2O3 content of 10 to 20 percent by mole, a SiO2 content of 50 to 65 percent by mole, an alkali metal oxide content of 10 to 20 percent by mole, a ZnO content of 1 to 5 percent by mole, a TiO2 content of 1 to 5 percent by mole, a ZrO2 content of 1 to 5 percent by mole, and an Al2O3 content of 1 to 5 percent by mole.
    Type: Grant
    Filed: November 15, 2006
    Date of Patent: March 31, 2009
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Akira Ohtani, Yuji Ukuma
  • Publication number: 20090052114
    Abstract: A multilayer electronic component includes a base body, internal electrodes disposed inside the base body and extending to exterior surfaces thereof, and terminal electrodes provided on the exterior surfaces of the base body and connected to the internal electrodes. The terminal electrodes include first electrode layers defined by plating layers, and preferably electroplating layer, and second electrode layers made of a conductive resin and provided on the first electrode layers.
    Type: Application
    Filed: November 3, 2008
    Publication date: February 26, 2009
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Akihiro MOTOKI, Makoto OGAWA, Yuji UKUMA
  • Publication number: 20080063877
    Abstract: An electronic component is provided which includes external electrodes having a multilayer structure of first and second sintered electrode layers that are densely sintered and have less possibility of causing poor appearance and decreased reliability in electrical connection. Each external electrode includes a first sintered electrode layer and a second sintered electrode layer. The first sintered electrode layer contains a first borosilicate glass containing an alkali metal in which there is 85% to 95% by weight of silicon and 0.5% to 1.5% by weight of the alkali metal based on 100% by weight of all contained elements other than boron. The second sintered electrode layer contains a second borosilicate glass containing an alkali metal in which there is 65% to 80% by weight of silicon and 3.5% to 8.0% by weight of the alkali metal based on 100% by weight of all contained elements other than boron.
    Type: Application
    Filed: February 14, 2005
    Publication date: March 13, 2008
    Inventor: Yuji Ukuma
  • Publication number: 20070057237
    Abstract: For mounting on a substrate by using an electroconductive adhesive, an electroconductive paste for forming an external electrode which has improved moisture resistance and which is resistant to occurrence of external-electrode peeling, as well as a ceramic electronic component including the electroconductive paste are provided. The electroconductive paste includes a base-metal electroconductive powder, first glass frit, and an organic vehicle, wherein the first glass frit has a B2O3 content of 10 to 20 percent by mole, a SiO2 content of 50 to 65 percent by mole, an alkali metal oxide content of 10 to 20 percent by mole, a ZnO content of 1 to 5 percent by mole, a TiO2 content of 1 to 5 percent by mole, a ZrO2 content of 1 to 5 percent by mole, and an Al2O3 content of 1 to 5 percent by mole.
    Type: Application
    Filed: November 15, 2006
    Publication date: March 15, 2007
    Inventors: Akira Ohtani, Yuji Ukuma