公开(公告)号：US12146899B2

公开(公告)日：2024-11-19

申请号：US17916641

申请日：2021-04-01

Applicant: KOA CORPORATION

Inventor： Susumu Toyoda ,  Keishi Nakamura ,  Shuhei Matsubara

IPC: G01R1/20 ,  H01C1/142 ,  H01C17/00

Abstract: The mounting area for an electronic component and a resistor for current detection is reduced. A current detection resistor for detecting current includes a plate-like resistive body, and a first electrode and an opposite second electrode which are stacked in a thickness direction of the resistive body and are disposed so as to sandwich the resistive body. The first electrode has a groove portion.

公开(公告)号：US20240282537A1

公开(公告)日：2024-08-22

申请号：US18653678

申请日：2024-05-02

Applicant: KOA CORPORATION

Inventor： Hiroshi ICHIKAWA ,  Tomonori OGUCHI ,  Atsushi KARASAWA

IPC: H01H37/76

CPC classification number: H01H37/761

Abstract: The chip-type current fuse is configured to include a fuse element 5 formed between a first front electrode 3 and a second front electrode 4. The fuse element 5 includes: a first linear portion 5a that has an end connected to the first front electrode 3 and extends in a direction toward the second front electrode 4; a second linear portion 5b that has an end connected to the second front electrode 4 and extends in parallel to the first linear portion 5a in a direction toward the first front electrode 3; and an inclined linear portion 5c that links the first linear portion 5a and the second linear portion 5b to each other. The inclined linear portion 5c is connected at an acute angle to each of the first linear portion 5a and the second linear portion 5b.

公开(公告)号：US20240248119A1

公开(公告)日：2024-07-25

申请号：US18559922

申请日：2022-04-22

Applicant: KOA CORPORATION

Inventor： Ryou Osawa

IPC: G01R1/20 ,  G01R19/00

CPC classification number: G01R1/203 ,  G01R19/0092

Abstract: The present invention relates to a current detection device, in particular a current detection device using a shunt resistor. The current detection device (30) includes a resistive element (5) and a pair of electrodes (6, 7). The electrodes (6, 7) have detection areas (24a, 25a) demarcated by first slits (16, 17), second slits (26, 27), and contact surfaces (6a, 7a) that at least partially contacts the resistive element (5). The electrodes (6, 7) further have voltage detection portions (20, 21) arranged in the detection areas (24a, 25a).

公开(公告)号：US20240210342A1

公开(公告)日：2024-06-27

申请号：US18579171

申请日：2022-06-16

Applicant: Nagaoka University of Technology ,  KOA Corporation

Inventor： Tomoichiro Okamoto ,  Kenichi Iguchi ,  Yukiko Ota ,  Ryosuke Komatsu ,  Zoku Ko ,  Tetsuro Tanaka

IPC: G01N27/12

CPC classification number: G01N27/125 ,  G01N27/123

Abstract: In a resistive oxygen gas sensor, an oxygen gas detection member for detecting oxygen gas contains, as a main component, a semiconductor material having a composition formula represented by RE(Ba2-x, REx)Cu3O, (wherein, RE is a rare earth element, x is 0≤x≤ 1.2, and y is 6.0≤y≤7.5).

公开(公告)号：US20240105559A1

公开(公告)日：2024-03-28

申请号：US18371150

申请日：2023-09-21

Applicant: KOA CORPORATION

Inventor： Hirofumi KUBOTA ,  Tomonori OGUCHI

IPC: H01L23/495 ,  H01L23/00

CPC classification number: H01L23/49541 ,  H01L23/4951 ,  H01L24/48 ,  H01L2224/48245 ,  H01L2924/182

Abstract: An electronic component according to an embodiment of the present invention includes: a chip; a die pad to which the chip is secured; a suspension terminal extending from the die pad; a lead terminal electrically connected to the chip; and a dummy terminal, in which the suspension terminal is disposed closer to the dummy terminal than the lead terminal.

公开(公告)号：US20230335317A1

公开(公告)日：2023-10-19

申请号：US18126517

申请日：2023-03-27

Applicant: KOA CORPORATION

Inventor： Taro KIMURA

IPC: H01C1/142

CPC classification number: H01C1/142

Abstract: A chip resistor 10 comprises: a insulating substrate 1; a pair of upper surface electrodes 2; a resistor 3; a pair of lower surface electrodes 5; a pair of resin electrode layers 6 made of synthetic resin materials containing conductive particles and laminated on the pair of lower surface electrodes 5; a pair of end face electrodes 7; and a pair of external electrodes 8, wherein the pair of the lower surface electrodes 5 is made of metal thin film layers formed as thin films on a mounting surface of the insulating substrate 1, respectively, and includes exposed portions 5a exposed from the resin electrode layers 6, respectively, and the pair of external electrodes 8 is in contact with the exposed portions 5a of the lower surface electrodes 5 and entire surfaces of the resin electrode layers 6, respectively. [Selected drawing] FIG. 1

公开(公告)号：US20230333143A1

公开(公告)日：2023-10-19

申请号：US18028610

申请日：2021-08-11

Applicant: KOA CORPORATION

Inventor： Koichi HIRASAWA ,  Shuhei MATSUBARA ,  Katsuhide NISHIZAWA ,  Keishi NAKAMURA

IPC: G01R1/20 ,  G01R15/14

CPC classification number: G01R1/203 ,  G01R15/146

Abstract: The present invention relates to a jumper element, a shunt resistor apparatus, and a method of adjusting characteristic of a shunt resistor apparatus for current detection. The jumper element (10) for constituting the shunt resistor apparatus for current detection is made of conductive metal material. The jumper element (10) includes: a body structure (11) that can be coupled to a resistance element (5) constituting a part of the shunt resistor apparatus; and a protrusion (12) formed on a side portion of the body structure (11), wherein the protrusion (12) is located so as not to overlap the resistor element (5).

公开(公告)号：US20230326631A1

公开(公告)日：2023-10-12

申请号：US18022926

申请日：2021-07-16

Applicant: KOA CORPORATION

Inventor： Yoshitaka KUMEDA ,  Tadahiko YOSHIOKA

IPC: H01C1/00 ,  H01C7/13 ,  C22C9/05 ,  C22F1/08 ,  C22F1/02

CPC classification number: H01C1/00 ,  H01C7/13 ,  C22C9/05 ,  C22F1/08 ,  C22F1/02

Abstract: Provided is a current detection resistor, such as a shunt resistor, wherein a. low specific resistance and a small thermal electromotive force with respect to copper are achieved, while maintaining a low TCR. A resistance alloy for use in a current detection shunt resistor includes 4.5 to 5.5 mass % of manganese, 0.05 to 0.30 mass % of silicon, 0.10 to 0.30 mass % of iron, and a balance being copper, and has a specific resistance of 15 to 25 μΩ·m.

公开(公告)号：US11742116B2

公开(公告)日：2023-08-29

申请号：US17741568

申请日：2022-05-11

Applicant: KOA CORPORATION

Inventor： Kazuhisa Ushiyama ,  Yuta Watanabe

IPC: H01C7/22

CPC classification number: H01C7/22

Abstract: The resistor 5 is a print-formed body including a meandering shaped first region 8 connected to the first front electrode 3 and a second region 9 connected to the first region 8 via a linking portion 10 and connected to the second front electrode 4. The first region 8 is provided with an I-cut shaped first trimming groove 11 and the second region 9 is provided with an L-cut shaped second trimming groove 12, and the side of the second region 9 positioned in the direction toward which a turn portion 12b of the second trimming groove 12 extends is an oblique side 9a that inclines to approach the second front electrode 4 as it approaches the connecting portion 7.

公开(公告)号：US20230187105A1

公开(公告)日：2023-06-15

申请号：US18079245

申请日：2022-12-12

Applicant: KOA CORPORATION

Inventor： Ryou Osawa

IPC: H01C1/14 ,  G01R19/00 ,  G01R1/20 ,  H01C1/014

CPC classification number: H01C1/14 ,  G01R19/0092 ,  G01R1/203 ,  H01C1/014

Abstract: A shunt resistor capable of reducing an absolute value of a temperature coefficient of resistance is disclosed. The shunt resistor includes: a base structure including a resistance element and a pair of electrodes; a bridge structure configured to bridge the pair of electrodes and made of a conductor; and connections configured to couple the pair of electrodes to the bridge structure. The bridge structure has a higher resistance than a resistance of the base structure at the connections.