Koa Corporation

Hitoshi Amemiya

Takanori Kikuchi

Koichi Hirasawa

Satoshi Chiku

Hiromu Sakai

Atsunori Hayashi

Provided is a jumper or current detection resistor element having suppressed occurrence of connection defects resulting from the electromigration. The element () of the invention comprises a main body () consisting of a metal plate-shaped body, and terminal sections () provided at both ends of the main body; the terminal sections protruding from the main body, and both terminal sections provided with a mounting surface; and curved or cut surfaces (A, B, C, D, E) formed at periphery of the mounting surface. Both terminal sections are further provided with opposing surfaces at inside in direction of disposition of both terminal sections, and thickness of the opposing surfaces decreases from the mounting surface () to the main body ().

Jumper or current detection resistor element

To provide manufacturing method for resistor that uses metal plate as resistance body, which can obtain desired accurate resistance value without trimming resistance body even if product becomes small. The method comprises; in method for manufacturing an unit resistor that has a pair of electrodes separated by insulation film, from resistor material that is provided with a metal plate consisting of resistance material, an insulation film pattern formed on the metal plate, and an electrode region formed besides area where insulation film pattern has been formed, by piercing predetermined piercing area, wherein length E of insulation film pattern is longer than width w of piercing area, wherein width L of insulation film pattern extends or narrows along direction of length E of insulation film pattern, and wherein position X of piercing area is adjusted in extent and in direction of length E of insulation film pattern.

Method for manufacturing a resistor

The resistor device is provided with a resistive plate () of metal plate material, which is used as a resistance body; a radiative plate () of metal plate material, which is spaced from the resistive plate and intercrossed on the resistive plate; a molded resin body (), which encloses an intercrossing portion of the resistive plate and the radiative plate; terminal portions of the resistive plate (), which comprises so that both ends of the resistive plate extending from the molded resin body are bent along an end face and a bottom face of the molded resin body; and terminal portions of the radiative plate (), which comprises so that both ends of the radiative plate extending from the molded resin body are bent along an end face and a bottom face of the molded resin body. Accordingly, the surface-mountable resin-sealed metal plate resistor device is enabled to increase the power capacity drastically and to improve the reliability without changing most of the size.

Growing community of inventors

Ina, Japan

Hitoshi Amemiya