公开(公告)号：US11170918B2

公开(公告)日：2021-11-09

申请号：US17049486

申请日：2019-04-08

Applicant: KOA CORPORATION

Inventor： Kazuhisa Ushiyama ,  Natsuki Iguchi ,  Yasuhiro Kamijo ,  Hisakazu Nagata

IPC: H01C17/00 ,  H01C17/242

Abstract: A chip resistor is capable of improving surge characteristic while finely adjusting a resistance value with high accuracy. A chip resistor includes a resistor which is print-formed such that a first meandering portion is consecutively connected to a second meandering portion across a rectangular adjustment portion. The adjustment portion is provided with a first trimming groove to lengthen a current path of the resistor, thereby improving the surge characteristic while coarsely adjusting a resistance value of the resistor to bring it close to a target resistance value. Furthermore, a second trimming groove is provided in an area of the second meandering portion where a current distribution is small, thereby finely adjusting the resistance value of the resistor to make it coincide with the target resistance value in accordance with a cutting amount of the second trimming groove.

公开(公告)号：US11164688B2

公开(公告)日：2021-11-02

申请号：US16980539

申请日：2019-03-19

Applicant: KOA CORPORATION

Inventor： Natsuki Iguchi ,  Kazuhisa Ushiyama ,  Yasuhiro Kamijo

IPC: H01C1/084 ,  H01C1/146 ,  H01C17/00 ,  H01C17/242

Abstract: An object is to provide a chip resistor in which hot spots can be dispersed and the adverse effects on performance caused by microcracks can also be reduced. A chip resistor includes an insulating substrate, a resistive element, and electrodes. In the resistive element, a first trimming groove and a second trimming groove are formed. A first vertical groove of the first trimming groove and a second vertical groove of the second trimming groove are formed with a spacing in between in an X1-X2 direction. A first horizontal groove of the first trimming groove and a second horizontal groove of the second trimming groove extend in directions approaching each other, and terminal ends of the first horizontal groove and the second horizontal groove are formed to be separated in the X1-X2 direction such that the first horizontal groove and the second horizontal groove do not overlap in a Y1-Y2 direction.

公开(公告)号：US11136257B2

公开(公告)日：2021-10-05

申请号：US16640441

申请日：2018-08-22

Applicant: KOA CORPORATION

Inventor： Natsuki Iguchi ,  Yuya Iguchi ,  Koichi Urano

IPC: H01K1/00 ,  H01B1/16 ,  C03C3/00 ,  H01B1/02 ,  H01B1/22 ,  H01L27/01 ,  H05K1/09

Abstract: This thick-film resistive element paste is a resistive element paste containing: an electrically conductive metal powder including a copper powder and a manganese powder; a glass powder; and an organic vehicle, and is characterized in that the glass powder contains primarily an alkaline-earth metal.