公开(公告)号：US20210249164A1

公开(公告)日：2021-08-12

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：US20210005361A1

公开(公告)日：2021-01-07

申请号：US16980539

申请日：2019-03-19

Applicant: KOA CORPORATION

Inventor： Natsuki IGUCHI ,  Kazuhisa USHIYAMA ,  Yasuhiro KAMIJO

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

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：US20210142932A1

公开(公告)日：2021-05-13

申请号：US16611875

申请日：2018-03-13

Applicant: KOA Corporation

Inventor： Kentaro MATSUMOTO ,  Natsuki IGUCHI

IPC: H01C17/242 ,  H01C17/00

Abstract: Regarding a chip resistor including a resistor provided with a first trimming groove for coarse adjustment and a second trimming groove for fine adjustment, the steps of setting the length of a first lateral direction cut part of the first trimming groove after L-shaped direction turning to be a certain length, setting coordinates of a trimming start point of the second trimming groove at a position which is constantly separated from a first vertical direction cut part of the first trimming groove only by a certain distance, and irradiating with a laser light from the coordinates toward a direction orthogonal to a direction between the electrodes are performed to form the second trimming groove which faces the first trimming groove and is oriented in the direction opposite to the orientation of the first trimming groove.