Patents by Inventor Atsuo HIRUKAWA

Atsuo HIRUKAWA 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: 20200373053
    Abstract: A multilayer coil component includes a multilayer body formed by stacking a plurality of insulating layers in a length direction and that has a built-in coil, and first and second outer electrodes that are electrically connected to the coil. The coil is formed by a plurality of coil conductors stacked in the length direction being electrically connected to each other. The first and second outer electrodes respectively cover parts of first and second end surfaces and parts of a first main surface. A stacking direction of the multilayer body and an axial direction of the coil are parallel to the first main surface. In a plan view from the stacking direction, a repeating shape of the coil conductors is a non-circular shape, and distances between the first main surface and the parts of the coil conductors that face the first main surface are not constant.
    Type: Application
    Filed: April 21, 2020
    Publication date: November 26, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Atsuo HIRUKAWA
  • Publication number: 20200373071
    Abstract: A multilayer coil component includes a multilayer body formed by stacking a plurality of insulating layers in a length direction and that has a built-in coil, and first and second outer electrodes that are electrically connected to the coil. The coil is formed by a plurality of coil conductors stacked in the length direction being electrically connected to each other. The first and second outer electrodes respectively cover parts of first and second end surfaces and parts of a first main surface. The length of a region in which the coil conductors are arranged in the stacking direction lies in a range from 85% to 95% of the length of the multilayer body. The sum of the numbers of stacked coil conductors that face the parts of the first and second outer electrodes extending along the first main surface is less than or equal to twelve.
    Type: Application
    Filed: May 22, 2020
    Publication date: November 26, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Atsuo HIRUKAWA, Yuki NISHIKAWA
  • Publication number: 20200373065
    Abstract: A multilayer coil component includes a multilayer body, and first and second outer electrodes. The multilayer body is formed by stacking plural insulating layers in a length direction, and includes a coil incorporated therein. The first and second outer electrodes are electrically connected to the coil. The coil is formed by electrically connecting plural coil conductors stacked in the length direction together with the insulating layers. The multilayer body has first and second end surfaces, first and second major surfaces, and first and second lateral surfaces. The first outer electrode has first, second, and third electrode portions. As viewed in plan in the width direction, the third electrode portion is substantially concave toward a vertex where first and second edges meet, the first edge being an edge where the first and third electrode portions meet, the second edge being an edge where the second and third electrode portions meet.
    Type: Application
    Filed: May 22, 2020
    Publication date: November 26, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Atsuo HIRUKAWA
  • Publication number: 20200373060
    Abstract: A sintered material contains Fe in an amount of from 8 mol % to 37 mol % in terms of Fe2O3, Zn in an amount of from 30 mol % to 60 mol % in terms of ZnO, Cu in an amount of from 1 mol % to 7 mol % in terms of CuO, Ni in an amount of from 3 mol % to 17 mol % in terms of NiO, and Si in an amount of from 7 mol % to 28 mol % in terms of SiO2. A mole ratio (SiO2/Fe2O3) of the SiO2 to the Fe2O3 is from 0.2 to 3.5. The sintered material contains B in an amount of from 0.05 mol parts to 0.5 mol parts.
    Type: Application
    Filed: May 22, 2020
    Publication date: November 26, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Yuki NISHIKAWA, Atsuo HIRUKAWA, Kazutoshi SUGII
  • Publication number: 20200373054
    Abstract: A multilayer coil component includes a multilayer body, and first and second outer electrodes. The multilayer body is formed by stacking plural insulating layers in a length direction, and includes a coil incorporated therein. The first and second outer electrodes are electrically connected to the coil. The coil is formed by electrically connecting plural coil conductors. The multilayer body has first and second end surfaces, first and second major surfaces, and first and second lateral surfaces. Each coil conductor has a line portion, and a land portion. As viewed in plan in the stacking direction, the land portion is not located inside the inner periphery of the line portion, and partially overlaps the line portion. As viewed in plan in the stacking direction, the land portion has a diameter of from about 1.05 times to about 1.3 times the line width of the line portion.
    Type: Application
    Filed: May 22, 2020
    Publication date: November 26, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Atsuo HIRUKAWA
  • Publication number: 20200373070
    Abstract: A multilayer coil component includes a multilayer body that contain a coil. The coil includes coil conductors. A lamination direction of the multilayer body and an axial direction of the coil are parallel to a first main surface. A distance between the coil conductors adjacent to each other in the lamination direction is from 4 ?m to 8 ?m. Each coil conductor includes a line portion and a land portion that is disposed at an end portion of the line portion. The land portions of the coil conductors adjacent to each other in the lamination direction are connected to each other with a via conductor interposed therebetween. A width of the line portion is from 30 ?m to 50 ?m. An inner diameter of each coil conductor is from 50 ?m to 100 ?m.
    Type: Application
    Filed: May 22, 2020
    Publication date: November 26, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Atsuo HIRUKAWA
  • Publication number: 20200373066
    Abstract: A multilayer coil component includes a multilayer body formed by stacking a plurality of insulating layers in a length direction and that has a built-in coil, and a first outer electrode and a second outer electrode that are electrically connected to the coil. The coil is formed by a plurality of coil conductors stacked in the length direction being electrically connected to each other. The first and second outer electrodes respectively cover parts of first and second end surfaces and parts of a first main surface. Two coil conductors are stacked in order to form one turn of the coil. Adjacent land portions of coil conductors in the stacking direction are connected to each other through via conductors. In a plan view from a width direction, the land portions are disposed in an upper half of the multilayer body on the opposite side from the first main surface.
    Type: Application
    Filed: May 22, 2020
    Publication date: November 26, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Atsuo Hirukawa
  • Publication number: 20200373068
    Abstract: A multilayer coil component includes a multilayer body formed by stacking a plurality of insulating layers in a length direction and that has a built-in coil, and a first outer electrode and a second outer electrode that are electrically connected to the coil. The coil is formed by a plurality of coil conductors stacked in the length direction being electrically connected to each other. The first and second outer electrodes respectively cover at least parts of first and second end surfaces. A stacking direction and a coil axis direction are parallel to the first main surface. A length of a region in which the coil conductors are arranged in the stacking direction is from 85% to 95% of a length of the multilayer body. A distance between coil conductors adjacent to each other in the stacking direction lies in a range from 12 ?m to 40 ?m.
    Type: Application
    Filed: May 22, 2020
    Publication date: November 26, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Atsuo HIRUKAWA
  • Publication number: 20200373067
    Abstract: A multilayer coil component includes a multilayer body formed by stacking a plurality of insulating layers in a length direction and that has a built-in coil, and a first outer electrode and a second outer electrode that are electrically connected to the coil. The coil is formed by a plurality of coil conductors stacked in the length direction being electrically connected to each other. The first and second outer electrodes respectively cover parts of first and second end surfaces and parts of a first main surface. The multilayer body includes a low-dielectric-constant portion, which is centrally arranged, and high-dielectric-constant portions, which are arranged at both ends in the stacking direction. The length of a region in which the coil conductors are arranged in the stacking direction lies in a range from 85% to 90% of a length of the multilayer body.
    Type: Application
    Filed: May 22, 2020
    Publication date: November 26, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Atsuo HIRUKAWA, Yuki NISHIKAWA
  • Publication number: 20200373069
    Abstract: A multilayer coil component includes a multilayer body formed by stacking a plurality of insulating layers in a length direction and that has a built-in coil, and first and second outer electrodes that are electrically connected to the coil. The coil is formed by a plurality of coil conductors stacked in the length direction being electrically connected to each other. The first and second outer electrodes respectively extend along and cover at least parts of first and second end surfaces and parts of a first main surface. A stacking direction of the multilayer body and a coil axis direction of the coil are parallel to the first main surface. A low-dielectric-constant layer having a smaller relative dielectric constant than the insulating layers is provided between the multilayer body and the part of the first outer electrode that extends along the first main surface.
    Type: Application
    Filed: May 22, 2020
    Publication date: November 26, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Atsuo HIRUKAWA
  • Publication number: 20200286676
    Abstract: A multilayer coil component includes a multilayer body formed by stacking a plurality of insulating layers on top of one another and that has a coil built thereinto, and a first outer electrode and a second outer electrode that are electrically connected to the coil. The coil is formed by electrically connecting a plurality of coil conductors. A first main surface of the multilayer body is a mounting surface. A stacking direction of the multilayer body is parallel to the mounting surface. The multilayer coil component includes first and second connection conductors. The first and second connection conductors overlap the coil conductors in a plan view from the stacking direction and are located closer to the mounting surface than a center axis of the coil. Distances between adjacent coil conductors are not constant in a side view from a direction perpendicular to the stacking direction.
    Type: Application
    Filed: March 2, 2020
    Publication date: September 10, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Atsuo HIRUKAWA
  • Publication number: 20200286663
    Abstract: A multilayer coil component includes a multilayer body that is formed by stacking a plurality of insulating layers on top of one another and that has a coil built into the inside thereof; and a first outer electrode and a second outer electrode that are electrically connected to the coil. The coil is formed by electrically connecting a plurality of coil conductors, which are stacked together with insulating layers, to one another. When a coil axis is assumed that is parallel to the length direction and penetrates from the first end surface to the second end surface of the multilayer body, all the coil conductors are arranged so that circles centered on center points of the coil conductors and having diameters that are less than or equal to around 20% of a coil diameter overlap a circumference of a virtual circle centered on the coil axis.
    Type: Application
    Filed: March 2, 2020
    Publication date: September 10, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Atsuo HIRUKAWA
  • Publication number: 20200286666
    Abstract: A multilayer coil component that includes a multilayer body formed by stacking a plurality of insulating layers on top of one another and that has a coil built into the inside thereof; and a first outer electrode and a second outer electrode that are electrically connected to the coil. The coil is formed by electrically connecting a plurality of coil conductors, which are stacked together with insulating layers, to one another. A first main surface of the multilayer body is a mounting surface. A stacking direction of the multilayer body and an axial direction of the coil are parallel to the mounting surface. At least one of the coil conductors is provided with an expanded region that has a line width that is larger than a coil line width in a plan view from the stacking direction.
    Type: Application
    Filed: March 2, 2020
    Publication date: September 10, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Atsuo HIRUKAWA
  • Publication number: 20200286665
    Abstract: A multilayer coil component includes a multilayer body formed by stacking a plurality of insulating layers on top of one another and that has a coil built thereinto, and a first outer electrode and a second outer electrode that are electrically connected to the coil. The coil is formed by electrically connecting a plurality of coil conductors to one another. A first main surface of the multilayer body is a mounting surface. A stacking direction of the multilayer body and an axial direction of the coil are parallel to the mounting surface. The insulating layers between the coil conductors are composed of a material containing at least one out of a magnetic material and a non-magnetic material. A content percentage of the non-magnetic material in the insulating layers changes in a direction from a first end surface toward a second end surface of the multilayer body.
    Type: Application
    Filed: March 2, 2020
    Publication date: September 10, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Atsuo HIRUKAWA
  • Publication number: 20200286664
    Abstract: A multilayer coil component includes a multilayer body that is formed by stacking a plurality of insulating layers on top of one another and that has a coil built into the inside thereof; and a first outer electrode and a second outer electrode that are electrically connected to the coil. The coil is formed by electrically connecting a plurality of coil conductors, which are stacked together with insulating layers, to one another. A first main surface of the multilayer body is a mounting surface. A stacking direction of the multilayer body and an axial direction of the coil are parallel to the mounting surface. The coil includes a plurality of different coil conductors having different coil diameters, and shortest distances from the first main surface to the coil conductors are identical for all of the plurality of different coil conductors.
    Type: Application
    Filed: March 2, 2020
    Publication date: September 10, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Atsuo HIRUKAWA
  • Publication number: 20190304667
    Abstract: A multilayer coil component includes a multilayer body formed by stacking a plurality of insulating layers and including a coil built therein, and first and second outer electrodes electrically connected to the coil. The coil is formed by electrically connecting a plurality of coil conductors stacked together with the insulating layers. The multilayer coil component further includes, inside the multilayer body, first and second connecting conductors. The first connecting conductor connects between a portion of the first outer electrode covering the first end face, and a coil conductor facing the portion. The second connecting conductor connects between a portion of the second outer electrode covering the second end face, and a coil conductor facing the portion. With respect to the length direction, the coil has a length from about 85.0% to about 94.0% of the length of the multilayer body.
    Type: Application
    Filed: March 29, 2019
    Publication date: October 3, 2019
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Atsuo HIRUKAWA
  • Publication number: 20190304656
    Abstract: A multilayer coil component includes a multilayer body formed by stacking a plurality of insulating layers and including a coil built in the multilayer body, and first and second outer electrodes electrically connected to the coil. The coil is formed by electrically connecting a plurality of coil conductors stacked together with the insulating layers. The multilayer coil component further includes, inside the multilayer body, first and second connecting conductors. The first connecting conductor connects between a portion of the first outer electrode covering the first end face, and a coil conductor facing the portion. The second connecting conductor connects between a portion of the second outer electrode covering the second end face, and a coil conductor facing the portion. The multilayer coil component has a transmission coefficient S21 at 40 GHz of from about ?1.0 dB to about 0 dB.
    Type: Application
    Filed: March 29, 2019
    Publication date: October 3, 2019
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Atsuo HIRUKAWA
  • Publication number: 20190304655
    Abstract: A multilayer coil component includes a multilayer body formed by stacking a plurality of insulating layers and including a coil built therein, and first and second outer electrodes electrically connected to the coil. The coil is formed by electrically connecting a plurality of coil conductors stacked together with the insulating layers. The multilayer coil component further includes, inside the multilayer body, first and second connecting conductors. The first connecting conductor connects between a portion of the first outer electrode covering the first end face, and a coil conductor facing the portion. The second connecting conductor connects between a portion of the second outer electrode covering the second end face, and a coil conductor facing the portion. Concerning the length direction, the first and second connecting conductors each have a length from about 2.5% to about 7.5% of the length of the multilayer body.
    Type: Application
    Filed: March 29, 2019
    Publication date: October 3, 2019
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Atsuo HIRUKAWA
  • Publication number: 20190164684
    Abstract: A multilayer coil component includes a multilayer body that is formed of laminated insulating layers and that contains a coil, and a first outer electrode and a second outer electrode that are electrically connected to the coil. The coil is formed of coil conductors. The first outer electrode covers a part of a first end surface of the multilayer body, extends from the first end surface, and covers a part of a first main surface thereof. The second outer electrode covers a part of a second end surface of the multilayer body, extends from the second end surface, and covers a part of the first main surface. A lamination direction of the multilayer body and an axial direction of the coil are parallel to a mounting surface. Determination marks are formed on surfaces of the multilayer body at locations at which the first and second outer electrodes are formed.
    Type: Application
    Filed: November 20, 2018
    Publication date: May 30, 2019
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Atsuo Hirukawa
  • Publication number: 20190164685
    Abstract: A multilayer coil component includes a multilayer body that is formed of laminated insulating layers and that contains a coil, and a first outer electrode and a second outer electrode that are electrically connected to the coil. The coil is formed of coil conductors. A first connection conductor linearly connects a part of the first outer electrode that covers the first end surface and one of the coil conductors that faces the part of the first outer electrode to each other. A second connection conductor linearly connects a part of the second outer electrode that covers the second end surface and another of the coil conductors that faces the part of the second outer electrode to each other. The first and second connection conductors overlap the coil conductors in a plan view from the lamination direction and are nearer than a central axis of the coil to a mounting surface.
    Type: Application
    Filed: November 20, 2018
    Publication date: May 30, 2019
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Atsuo HIRUKAWA