公开(公告)号：US12243667B2

公开(公告)日：2025-03-04

申请号：US17759487

申请日：2020-12-25

Applicant: KOA Corporation

Inventor： Yohei Tokiwa ,  Kohji Eto ,  Tomofumi Noguchi ,  Reina Kaneko

IPC: H01C1/14 ,  H01C17/00

Abstract: A manufacturing method of a resistor contains: a step of forming a resistor base material by stacking an electrode material, a resistive material, and an electrode material in this order and by bonding the electrode material, the resistive material, and the electrode material by applying pressure in the stacked direction; a step of passing the resistor base material through a die, the die being formed with an opening portion having a dimension smaller than an outer dimension of the resistor base material; and a step of obtaining an individual resistor from the resistor base material passed through the die.

公开(公告)号：US12241852B2

公开(公告)日：2025-03-04

申请号：US17754126

申请日：2020-08-26

Applicant: National Institute of Technology ,  KOA Corporation

Inventor： Shigenori Matsushima ,  Kenji Obata ,  Kenichi Iguchi ,  Yukiko Ota ,  Hisakazu Nagata ,  Koichi Urano

IPC: G01N27/12 ,  C01G49/00

Abstract: The gas sensor is provided with: a base material; a first electrode and a second electrode arranged on the base material; and a gas detection member connected to the first electrode and the second electrode, wherein the gas detection member contains flaky particles of alkaline earth ferrite.

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.