Patents by Inventor Jun Urakawa
Jun Urakawa 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: 20230109726Abstract: A glass that contains Si, B, Al, and Zn. The glass has SiO2 at a content of 15% by weight to 65% by weight, B2O3 at a content of 11% by weight to 30% by weight, Al2O3, and ZnO, wherein a weight ratio of the SiO2 to the B2O3 (SiO2/B2O3) is 1.21 or higher, and a weight ratio of the Al2O3 to the ZnO (Al2O3/ZnO) is 0.75 to 1.64, and wherein an alkaline-earth metal is excluded as a material contained in the glass.Type: ApplicationFiled: December 14, 2022Publication date: April 13, 2023Inventors: Taichi WATANABE, Yasutaka SUGIMOTO, Jun URAKAWA
-
Patent number: 10193333Abstract: An ESD protection device is manufactured such that its ESD characteristics are easily adjusted and stabilized. The ESD protection device includes an insulating substrate, a cavity provided in the insulating substrate, at least one pair of discharge electrodes each including a portion exposed in the cavity, the exposed portions being arranged to face each other, and external electrodes provided on a surface of the insulating substrate and connected to the at least one pair of discharge electrodes. A particulate supporting electrode material having conductivity is dispersed between the exposed portions of the at least one pair of discharge electrodes in the cavity.Type: GrantFiled: April 24, 2017Date of Patent: January 29, 2019Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Jun Adachi, Jun Urakawa, Issei Yamamoto
-
Publication number: 20170229859Abstract: An ESD protection device is manufactured such that its ESD characteristics are easily adjusted and stabilized. The ESD protection device includes an insulating substrate, a cavity provided in the insulating substrate, at least one pair of discharge electrodes each including a portion exposed in the cavity, the exposed portions being arranged to face each other, and external electrodes provided on a surface of the insulating substrate and connected to the at least one pair of discharge electrodes.Type: ApplicationFiled: April 24, 2017Publication date: August 10, 2017Inventors: Jun ADACHI, Jun URAKAWA, Issei YAMAMOTO
-
Patent number: 9681593Abstract: An ESD protection device is manufactured such that its ESD characteristics are easily adjusted and stabilized. The ESD protection device includes an insulating substrate, a cavity provided in the insulating substrate, at least one pair of discharge electrodes each including a portion exposed in the cavity, the exposed portions being arranged to face each other, and external electrodes provided on a surface of the insulating substrate and connected to the at least one pair of discharge electrodes. A particulate supporting electrode material having conductivity is dispersed between the exposed portions of the at least one pair of discharge electrodes in the cavity.Type: GrantFiled: January 29, 2015Date of Patent: June 13, 2017Assignee: Murata Manufacturing Co., Ltd.Inventors: Jun Adachi, Jun Urakawa, Issei Yamamoto
-
Patent number: 9148109Abstract: A monolithic ceramic electronic component includes at least two types of stacked ceramic layers having different dielectric constants and also includes internal electrodes partially disposed along boundaries between the ceramic layers having different dielectric constants. The internal electrodes include an additive component common to a component included in at least one of the ceramic layers adjacent to each other with the internal electrodes placed therebetween.Type: GrantFiled: December 20, 2012Date of Patent: September 29, 2015Assignee: Murata Manufacturing Co. Ltd.Inventors: Ai Sasaki, Jun Urakawa
-
Patent number: 9077174Abstract: The ESD protection device includes: opposed electrodes 2 including an opposed electrode 2a on one side and an opposed electrode 2b on the other side, and a discharge auxiliary electrode 3, the discharge auxiliary electrode being placed so as to extend from the opposed electrode on one side to the opposed electrode on the other side, wherein the discharge auxiliary electrode contains metal grains, semiconductor grains and a glass material, the metal grains, the semiconductor grains, and the metal grain and the semiconductor grain are bound together, respectively, via the glass material, the average grain size X of the metal grains is 1.0 ?m or more, and the relationship between the thickness Y of the discharge auxiliary electrode and the average grain size X of the metal grains satisfies the requirement of 0.5?Y/X?3.Type: GrantFiled: March 28, 2013Date of Patent: July 7, 2015Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Kumiko Hiehata, Takahiro Sumi, Jun Adachi, Jun Urakawa, Takayuki Tsukizawa
-
Publication number: 20150140201Abstract: An ESD protection device is manufactured such that its ESD characteristics are easily adjusted and stabilized. The ESD protection device includes an insulating substrate, a cavity provided in the insulating substrate, at least one pair of discharge electrodes each including a portion exposed in the cavity, the exposed portions being arranged to face each other, and external electrodes provided on a surface of the insulating substrate and connected to the at least one pair of discharge electrodes.Type: ApplicationFiled: January 29, 2015Publication date: May 21, 2015Inventors: Jun ADACHI, Jun URAKAWA, Issei YAMAMOTO
-
Patent number: 8975099Abstract: An ESD protection device is manufactured such that its ESD characteristics are easily adjusted and stabilized. The ESD protection device includes an insulating substrate, a cavity provided in the insulating substrate, at least one pair of discharge electrodes each including a portion exposed in the cavity, the exposed portions being arranged to face each other, and external electrodes provided on a surface of the insulating substrate and connected to the at least one pair of discharge electrodes. A particulate supporting electrode material having conductivity is dispersed between the exposed portions of the at least one pair of discharge electrodes in the cavity.Type: GrantFiled: June 3, 2014Date of Patent: March 10, 2015Assignee: Murata Manufacturing Co., Ltd.Inventors: Jun Adachi, Jun Urakawa, Issei Yamamoto
-
Publication number: 20140261969Abstract: An ESD protection device is manufactured such that its ESD characteristics are easily adjusted and stabilized. The ESD protection device includes an insulating substrate, a cavity provided in the insulating substrate, at least one pair of discharge electrodes each including a portion exposed in the cavity, the exposed portions being arranged to face each other, and external electrodes provided on a surface of the insulating substrate and connected to the at least one pair of discharge electrodes.Type: ApplicationFiled: June 3, 2014Publication date: September 18, 2014Applicant: MURATA MANUFACTURING CO., LTD.Inventors: Jun ADACHI, Jun URAKAWA, Issei YAMAMOTO
-
Patent number: 8779466Abstract: An ESD protection device is manufactured such that its ESD characteristics are easily adjusted and stabilized. The ESD protection device includes an insulating substrate, a cavity provided in the insulating substrate, at least one pair of discharge electrodes each including a portion exposed in the cavity, the exposed portions being arranged to face each other, and external electrodes provided on a surface of the insulating substrate and connected to the at least one pair of discharge electrodes. A particulate supporting electrode material having conductivity is dispersed between the exposed portions of the at least one pair of discharge electrodes in the cavity.Type: GrantFiled: February 13, 2013Date of Patent: July 15, 2014Assignee: Murata Manufacturing Co., Ltd.Inventors: Jun Adachi, Jun Urakawa, Issei Yamamoto
-
Patent number: 8693157Abstract: A substrate including an ESD protection function includes an insulating substrate, at least one of circuit elements or a wiring pattern and an ESD protection portion. In the ESD protection portion, facing portions of at least one pair of discharge electrodes are disposed in a cavity provided in the insulating substrate so that the ends face each other. The discharge electrodes are electrically connected to the circuit elements and or the wiring pattern.Type: GrantFiled: October 29, 2010Date of Patent: April 8, 2014Assignee: Murata Manufacturing Co., Ltd.Inventors: Takashi Noma, Jun Urakawa
-
Patent number: 8455918Abstract: An ESD protection device is manufactured such that its ESD characteristics are easily adjusted and stabilized. The ESD protection device includes an insulating substrate, a cavity provided in the insulating substrate, at least one pair of discharge electrodes each including an exposed portion that is exposed in the cavity, and external electrodes provided on a surface of the insulating substrate and connected to the discharge electrodes. Supporting electrodes obtained by dispersing conductive powder in an insulating material defining the insulating substrate are provided along a bottom surface and a top surface that define the cavity between the exposed portions of the at least one pair of discharge electrodes.Type: GrantFiled: May 25, 2011Date of Patent: June 4, 2013Assignee: Murata Manufacturing Co., Ltd.Inventors: Jun Adachi, Jun Urakawa
-
Patent number: 8432653Abstract: An ESD protection device includes a ceramic multilayer substrate, at least one pair of discharge electrodes provided in the ceramic multilayer substrate and facing each other with a space formed therebetween, external electrodes provided on a surface of the ceramic multilayer substrate and connected to the discharge electrodes. The ESD protection device includes a supporting electrode obtained by dispersing a metal material and a semiconductor material and being arranged in a region that connects the pair of discharge electrodes to each other.Type: GrantFiled: June 6, 2011Date of Patent: April 30, 2013Assignee: Murata Manufacturing Co., Ltd.Inventors: Jun Adachi, Jun Urakawa, Takahiro Sumi, Takahiro Kitadume
-
Patent number: 8426889Abstract: An ESD protection device is manufactured such that its ESD characteristics are easily adjusted and stabilized. The ESD protection device includes an insulating substrate, a cavity provided in the insulating substrate, at least one pair of discharge electrodes each including a portion exposed in the cavity, the exposed portions being arranged to face each other, and external electrodes provided on a surface of the insulating substrate and connected to the at least one pair of discharge electrodes. A particulate supporting electrode material having conductivity is dispersed between the exposed portions of the at least one pair of discharge electrodes in the cavity.Type: GrantFiled: May 23, 2011Date of Patent: April 23, 2013Assignee: Murata Manufacturing Co., Ltd.Inventors: Jun Adachi, Jun Urakawa, Issei Yamamoto
-
Patent number: 8421582Abstract: An ESD protection device includes opposed electrodes in a ceramic base material and a discharge auxiliary electrode in contact with each of the opposed electrodes which is arranged so as to provide a bridge from the opposed electrode on one side to the opposed electrode on the other side, the discharge auxiliary electrode includes metallic particles, semiconductor particles, and a vitreous material, and bonding is provided through the vitreous material between the metallic particles, between the semiconductor particles, and between the metallic particles and the semiconductor particles. The metallic particles have an average particle diameter X of about 1.0 ?m or more, and the relationship between the thickness Y of the discharge auxiliary electrode and the average particle diameter X of the metallic particles satisfies about 0.5?Y/X? about 3.Type: GrantFiled: February 29, 2012Date of Patent: April 16, 2013Assignee: Murata Manufacturing Co., Ltd.Inventors: Kumiko Hiehata, Takahiro Sumi, Jun Adachi, Jun Urakawa, Takayuki Tsukizawa
-
Patent number: 8361918Abstract: To provide a ceramic composition not only having little compositional variation after burning, but a high flexural strength of the sintered body, and a high Q value in a microwave band, a ceramic composition used for forming a ceramic layer of a multi-layer ceramic substrate contains 47.0 to 67.0 wt. % of SiO2, 21.0 to 41.0 wt. % of BaO, and 10.0 to 18.0 wt. % of Al2O3, and contains as a first additive, 1.0 to 5.0 parts by weight of CeO2, relative to a total of 100 parts of SiO2, BaO and Al2O3, and as a second additive, 2.5 to 5.5 parts by weight of MnO, relative to a total of 100 parts by weight of SiO2, BaO, Al2O3 and CeO2, and is substantially free of Cr. As a third additive, at least one of Zr, Ti, Zn, Nb, Mg and Fe, and as a fourth additive, a Co component and/or a V component, may be contained.Type: GrantFiled: February 16, 2010Date of Patent: January 29, 2013Assignee: Murata Manufacturing Co., Ltd.Inventors: Machiko Motoya, Tsutomu Tatekawa, Jun Urakawa, Tsuyoshi Katsube, Yoichi Moriya
-
Patent number: 8238069Abstract: An ESD protection device has a structure that allows ESD characteristics to be easily adjusted and stabilized. The ESD protection device includes a ceramic multilayer substrate, at least a pair of discharge electrodes located in the ceramic multilayer substrate and facing each other with a space disposed therebetween, and external electrodes located on a surface of the ceramic multilayer substrate and connected to the discharge electrodes. The ESD protection device includes a supporting electrode disposed in a region that connects the pair of discharge electrodes. The supporting electrode is made of a conductive material coated with an inorganic material having no conductivity.Type: GrantFiled: July 30, 2010Date of Patent: August 7, 2012Assignee: Murata Manufacturing Co., Ltd.Inventors: Jun Adachi, Jun Urakawa, Takahiro Sumi, Takahiro Kitazume
-
Publication number: 20120169452Abstract: An ESD protection device includes opposed electrodes in a ceramic base material and a discharge auxiliary electrode in contact with each of the opposed electrodes which is arranged so as to provide a bridge from the opposed electrode on one side to the opposed electrode on the other side, the discharge auxiliary electrode includes metallic particles, semiconductor particles, and a vitreous material, and bonding is provided through the vitreous material between the metallic particles, between the semiconductor particles, and between the metallic particles and the semiconductor particles. The metallic particles have an average particle diameter X of about 1.0 ?m or more, and the relationship between the thickness Y of the discharge auxiliary electrode and the average particle diameter X of the metallic particles satisfies about 0.5?Y/X? about 3.Type: ApplicationFiled: February 29, 2012Publication date: July 5, 2012Applicant: MURATA MANUFACTURING CO., LTD.Inventors: Kumiko HIEHATA, Takahiro SUMI, Jun ADACHI, Jun URAKAWA, Takayuki TSUKIZAWA
-
Publication number: 20110227196Abstract: An ESD protection device includes a ceramic multilayer substrate, at least one pair of discharge electrodes provided in the ceramic multilayer substrate and facing each other with a space formed therebetween, external electrodes provided on a surface of the ceramic multilayer substrate and connected to the discharge electrodes. The ESD protection device includes a supporting electrode obtained by dispersing a metal material and a semiconductor material and being arranged in a region that connects the pair of discharge electrodes to each other.Type: ApplicationFiled: June 6, 2011Publication date: September 22, 2011Applicant: MURATA MANUFACTURING CO., LTD.Inventors: Jun ADACHI, Jun URAKAWA, Takahiro SUMI, Takahiro KITADUME
-
Publication number: 20110222203Abstract: An ESD protection device is manufactured such that its ESD characteristics are easily adjusted and stabilized. The ESD protection device includes an insulating substrate, a cavity provided in the insulating substrate, at least one pair of discharge electrodes each including an exposed portion that is exposed in the cavity, and external electrodes provided on a surface of the insulating substrate and connected to the discharge electrodes. Supporting electrodes obtained by dispersing conductive powder in an insulating material defining the insulating substrate are provided along a bottom surface and a top surface that define the cavity between the exposed portions of the at least one pair of discharge electrodes.Type: ApplicationFiled: May 25, 2011Publication date: September 15, 2011Applicant: MURATA MANUFACTURING CO., LTD.Inventors: Jun ADACHI, Jun URAKAWA