Patents by Inventor Daisuke Iwanaga
Daisuke Iwanaga 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).
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Patent number: 11615919Abstract: A multi-layer ceramic electronic device includes an element body and terminal electrodes. The terminal electrodes include end electrode parts covering ends of the element body in which internal electrode layers are led and upper electrode parts continuing to the end electrode parts and each partially covering an upper surface of the element body in a lamination direction. The terminal electrodes are not substantially formed on a lower surface of the element body located opposite to the upper surface of the element body in the lamination direction.Type: GrantFiled: October 19, 2021Date of Patent: March 28, 2023Assignee: TDK CORPORATIONInventors: Hirobumi Tanaka, Toshio Sakurai, Keisuke Okai, Daisuke Iwanaga, Hisashi Nakata, Tomoya Shibasaki
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Patent number: 11551896Abstract: A magnetically actuated MEMS switch 100 includes a first magnetic core portion 120, a first signal line 15, a first contact point 16, a second magnetic core portion 220, a second signal line 25, a second contact point 26, and a first coil portion 111 and a second coil portion 211 serving as a magnetic field applying portion that causes a current to flow in conductor coil to apply a magnetic field to the first magnetic core portion 120 and the second magnetic core portion 220. The first contact point 16 is displaced depending on the presence or absence of a magnetic field applied by the magnetic field applying portion. Connection and disconnection between the first contact point 16 and the second contact point 26 are switched in response to displacement of the first contact point 16.Type: GrantFiled: June 22, 2021Date of Patent: January 10, 2023Assignee: TDK CORPORATIONInventors: Akifumi Kamijima, Atsushi Iijima, Kyung-Ku Choi, Katsunori Osanai, Daisuke Iwanaga
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Patent number: 11476049Abstract: A multi-layer ceramic electronic device includes an element body and terminal electrodes. The terminal electrodes include end electrode parts covering ends of the element body in which internal electrode layers are led and upper electrode parts continuing to the end electrode parts and each partially covering an upper surface of the element body in a lamination direction. An upper-surface cover layer covering the upper surface of the element body located between the upper electrode parts has an external surface substantially flush with external surfaces of the upper electrode parts. The terminal electrodes are not substantially formed on a lower surface of the element body located opposite to the upper surface of the element body in the lamination direction.Type: GrantFiled: October 30, 2019Date of Patent: October 18, 2022Assignee: TDK CORPORATIONInventors: Toshio Sakurai, Hirobumi Tanaka, Keisuke Okai, Daisuke Iwanaga, Hisashi Nakata, Tomoya Shibasaki
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Patent number: 11295896Abstract: A multilayer ceramic electronic component includes an element body, a via-hole electrode, and a terminal electrode. The element body includes internal electrode layers and insulation layers alternately laminated in a lamination direction. The via-hole electrode penetrates from an upper surface of the element body thereinto and is connected with at least one of the internal electrode layers. The terminal electrode is formed on the upper surface of the element body and connected with the via-hole electrode. The via-hole electrode is embedded in a via hole formed on the element body so that a predetermined clearance space is formed in the via hole.Type: GrantFiled: October 28, 2019Date of Patent: April 5, 2022Assignee: TDK CORPORATIONInventors: Toshio Sakurai, Hirobumi Tanaka, Keisuke Okai, Daisuke Iwanaga, Hisashi Nakata, Tomoya Shibasaki
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Publication number: 20220044871Abstract: A multi-layer ceramic electronic device includes an element body and terminal electrodes. The terminal electrodes include end electrode parts covering ends of the element body in which internal electrode layers are led and upper electrode parts continuing to the end electrode parts and each partially covering an upper surface of the element body in a lamination direction. The terminal electrodes are not substantially formed on a lower surface of the element body located opposite to the upper surface of the element body in the lamination direction.Type: ApplicationFiled: October 19, 2021Publication date: February 10, 2022Applicant: TDK CORPORATIONInventors: Hirobumi TANAKA, Toshio SAKURAI, Keisuke OKAI, Daisuke IWANAGA, Hisashi NAKATA, Tomoya SHIBASAKI
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Patent number: 11195658Abstract: A multi-layer ceramic electronic device includes an element body and terminal electrodes. The terminal electrodes include end electrode parts covering ends of the element body in which internal electrode layers are led and upper electrode parts continuing to the end electrode parts and each partially covering an upper surface of the element body in a lamination direction. The terminal electrodes are not substantially formed on a lower surface of the element body located opposite to the upper surface of the element body in the lamination direction.Type: GrantFiled: October 30, 2019Date of Patent: December 7, 2021Assignee: TDK CORPORATIONInventors: Hirobumi Tanaka, Toshio Sakurai, Keisuke Okai, Daisuke Iwanaga, Hisashi Nakata, Tomoya Shibasaki
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Publication number: 20210313130Abstract: A magnetically actuated MEMS switch 100 includes a first magnetic core portion 120, a first signal line 15, a first contact point 16, a second magnetic core portion 220, a second signal line 25, a second contact point 26, and a first coil portion 111 and a second coil portion 211 serving as a magnetic field applying portion that causes a current to flow in conductor coil to apply a magnetic field to the first magnetic core portion 120 and the second magnetic core portion 220. The first contact point 16 is displaced depending on the presence or absence of a magnetic field applied by the magnetic field applying portion. Connection and disconnection between the first contact point 16 and the second contact point 26 are switched in response to displacement of the first contact point 16.Type: ApplicationFiled: June 22, 2021Publication date: October 7, 2021Applicant: TDK CORPORATIONInventors: Akifumi KAMIJIMA, Atsushi IIJIMA, Kyung-Ku CHOI, Katsunori OSANAI, Daisuke IWANAGA
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Patent number: 11107632Abstract: A multilayer ceramic electronic component includes an element body and a terminal electrode. The element body includes internal electrode layers and insulation layers alternately laminated in a lamination direction. The terminal electrode is formed on an outer surface of the element body to be contacted and connected with the internal electrode layers. The terminal electrode includes an end-side electrode part and an upper-side electrode part. The end-side electrode part covers a leading end of the element body where the internal electrode layers are led. The upper-side electrode part is formed on a part of an upper surface of the element body and continues to the end-side electrode part. The terminal electrode is not substantially formed on a lower surface of the element body located on the other side of the upper surface along the lamination direction.Type: GrantFiled: July 24, 2019Date of Patent: August 31, 2021Assignee: TDK CORPORATIONInventors: Toshio Sakurai, Hirobumi Tanaka, Keisuke Okai, Daisuke Iwanaga, Hisashi Nakata, Tomoya Sihbasaki
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Patent number: 11075041Abstract: A magnetically actuated MEMS switch 100 includes a first magnetic core portion 120, a first signal line 15, a first contact point 16, a second magnetic core portion 220, a second signal line 25, a second contact point 26, and a first coil portion 111 and a second coil portion 211 serving as a magnetic field applying portion that causes a current to flow in conductor coil to apply a magnetic field to the first magnetic core portion 120 and the second magnetic core portion 220. The first contact point 16 is displaced depending on the presence or absence of a magnetic field applied by the magnetic field applying portion. Connection and disconnection between the first contact point 16 and the second contact point 26 are switched in response to displacement of the first contact point 16.Type: GrantFiled: April 8, 2019Date of Patent: July 27, 2021Assignee: TDK CORPORATIONInventors: Akifumi Kamijima, Atsushi Iijima, Kyung-Ku Choi, Katsunori Osanai, Daisuke Iwanaga
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Publication number: 20200161051Abstract: A multi-layer ceramic electronic device includes an element body and terminal electrodes. The terminal electrodes include end electrode parts covering ends of the element body in which internal electrode layers are led and upper electrode parts continuing to the end electrode parts and each partially covering an upper surface of the element body in a lamination direction. The terminal electrodes are not substantially formed on a lower surface of the element body located opposite to the upper surface of the element body in the lamination direction.Type: ApplicationFiled: October 30, 2019Publication date: May 21, 2020Applicant: TDK CORPORATIONInventors: Hirobumi TANAKA, Toshio SAKURAI, Keisuke OKAI, Daisuke IWANAGA, Hisashi NAKATA, Tomoya SHIBASAKI
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Publication number: 20200152382Abstract: A multi-layer ceramic electronic device includes an element body and terminal electrodes. The terminal electrodes include end electrode parts covering ends of the element body in which internal electrode layers are led and upper electrode parts continuing to the end electrode parts and each partially covering an upper surface of the element body in a lamination direction. An upper-surface cover layer covering the upper surface of the element body located between the upper electrode parts has an external surface substantially flush with external surfaces of the upper electrode parts. The terminal electrodes are not substantially formed on a lower surface of the element body located opposite to the upper surface of the element body in the lamination direction.Type: ApplicationFiled: October 30, 2019Publication date: May 14, 2020Applicant: TDK CORPORATIONInventors: Toshio SAKURAI, Hirobumi TANAKA, Keisuke OKAI, Daisuke IWANAGA, Hisashi NAKATA, Tomoya SHIBASAKI
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Publication number: 20200135400Abstract: A multilayer ceramic electronic component includes an element body, a via-hole electrode, and a terminal electrode. The element body includes internal electrode layers and insulation layers alternately laminated in a lamination direction. The via-hole electrode penetrates from an upper surface of the element body thereinto and is connected with at least one of the internal electrode layers. The terminal electrode is formed on the upper surface of the element body and connected with the via-hole electrode. The via-hole electrode is embedded in a via hole formed on the element body so that a predetermined clearance space is formed in the via hole.Type: ApplicationFiled: October 28, 2019Publication date: April 30, 2020Applicant: TDK CORPORATIONInventors: Toshio SAKURAI, Hirobumi TANAKA, Keisuke OKAI, Daisuke IWANAGA, Hisashi NAKATA, Tomoya SHIBASAKI
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Publication number: 20200035417Abstract: A multilayer ceramic electronic component includes an element body and a terminal electrode. The element body includes internal electrode layers and insulation layers alternately laminated in a lamination direction. The terminal electrode is formed on an outer surface of the element body to be contacted and connected with the internal electrode layers. The terminal electrode includes an end-side electrode part and an upper-side electrode part. The end-side electrode part covers a leading end of the element body where the internal electrode layers are led. The upper-side electrode part is formed on a part of an upper surface of the element body and continues to the end-side electrode part. The terminal electrode is not substantially formed on a lower surface of the element body located on the other side of the upper surface along the lamination direction.Type: ApplicationFiled: July 24, 2019Publication date: January 30, 2020Applicant: TDK CORPORATIONInventors: Toshio SAKURAI, Hirobumi TANAKA, Keisuke OKAI, Daisuke IWANAGA, Hisashi NAKATA, Tomoya SIHBASAKI
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Publication number: 20190318893Abstract: A magnetically actuated MEMS switch 100 includes a first magnetic core portion 120, a first signal line 15, a first contact point 16, a second magnetic core portion 220, a second signal line 25, a second contact point 26, and a first coil portion 111 and a second coil portion 211 serving as a magnetic field applying portion that causes a current to flow in conductor coil to apply a magnetic field to the first magnetic core portion 120 and the second magnetic core portion 220. The first contact point 16 is displaced depending on the presence or absence of a magnetic field applied by the magnetic field applying portion. Connection and disconnection between the first contact point 16 and the second contact point 26 are switched in response to displacement of the first contact point 16.Type: ApplicationFiled: April 8, 2019Publication date: October 17, 2019Applicant: TDK CORPORATIONInventors: Akifumi KAMIJIMA, Atsushi IIJIMA, Kyung-Ku CHOI, Katsunori OSANAI, Daisuke IWANAGA
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Publication number: 20120162854Abstract: The present invention relates to a multilayer ceramic capacitor which is superior in stability of temperature characteristic of specific permittivity and has a high specific permittivity and a high reliability. Said multilayer ceramic capacitor is characterized in that the dielectric layers include BTZ based dielectric ceramic composition, in which Ti is substituted by 1 to 8 mol % of Zr with respect to Ti, as a main component, dielectric particles constituting the BTZ based dielectric ceramic composition substantially do not have shell structures, and Curie temperature of the BTZ based dielectric ceramic composition is higher than a temperature range of the multilayer ceramic capacitor used.Type: ApplicationFiled: December 27, 2011Publication date: June 28, 2012Applicant: TDK CORPORATIONInventor: Daisuke IWANAGA
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Patent number: 7538057Abstract: A ceramic electronic device having a dielectric layer, wherein the dielectric layer includes a main component containing a (Ba, Ca (Ti, Zr)O3 based material and a subcomponent containing an oxide of Si; and a content of the Si oxide is 0 to 0.4 wt % (note that 0 is not included) with respect to the entire dielectric layer; and preferably the dielectric layer has a segregation phase; and the segregation phase contains an oxide of Si and substantially not containing an oxide of Li; by which it is possible to provide a ceramic electronic device, such as a multilayer ceramic capacitor, having a low IR defect rate (initial insulation resistance defect rate), excellent high temperature load lifetime and high reliability.Type: GrantFiled: June 13, 2005Date of Patent: May 26, 2009Assignee: TDK CorporationInventors: Kazushige Ito, Daisuke Iwanaga, Akira Sato
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Patent number: 7335329Abstract: A method of producing a multilayer ceramic capacitor having internal electrode layers and dielectric layers with dielectric particles is disclosed. An average particle diameter of the dielectric particles, when measured parallel with the direction of the internal electrode layers, is larger than a thickness of the dielectric layer. A ratio (R/d) between the average particle diameter (R) and the thickness (d) of the dielectric layer is 1<R/d<3.Type: GrantFiled: August 5, 2003Date of Patent: February 26, 2008Assignee: TDK CorporationInventors: Yukie Nakano, Shunichi Yuri, Mari Miyauchi, Daisuke Iwanaga
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Patent number: 7304830Abstract: A laminated ceramic capacitor including a capacitor body where internal electrodes and a dielectric layer are alternately laminated, and external electrodes are provided on the end faces thereof. In this capacitor body, high resistance layers are provided between the internal electrodes and dielectric layer. These high resistance layers contain a ceramic material, an element including at least one selected from Mn, Cr, Co, Fe, Cu, Ni, Mo and V, and/or a rare earth element.Type: GrantFiled: July 29, 2005Date of Patent: December 4, 2007Assignee: TDK CorporationInventor: Daisuke Iwanaga
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Patent number: 7259957Abstract: The capacitor 10 (laminated ceramic capacitor) of the invention comprises a capacitor body 11 wherein internal electrodes 12 (electrodes) and a dielectric layer 14 are alternately laminated, and external electrodes 15 are provided on the end faces thereof. The dielectric layer 14 has a site containing particles of a dielectric material which is formed of only one of these particles in its thickness direction. Regions 24 comprising at least one element selected from a group comprising Si, Li and B are scattered between the internal electrodes 12 and dielectric layer 14.Type: GrantFiled: July 29, 2005Date of Patent: August 21, 2007Assignee: TDK CorporationInventor: Daisuke Iwanaga
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Publication number: 20060177678Abstract: The capacitor 10 (laminated ceramic capacitor) of the invention comprises a capacitor body 11 wherein internal electrodes 12 (electrodes) and a dielectric layer 14 are alternately laminated, and external electrodes 15 are provided on the end faces thereof. The dielectric layer 14 has a site containing particles of a dielectric material which is formed of only one of these particles in its thickness direction. Regions 24 comprising at least one element selected from a group comprising Si, Li and B are scattered between the internal electrodes 12 and dielectric layer 14.Type: ApplicationFiled: July 29, 2005Publication date: August 10, 2006Applicant: TDK CorporationInventor: Daisuke Iwanaga