Koa Corporation

Ryusuke Suzuki

Katsuya Miura

Hideki Fujiwara

Tatsuya Kawahara

Takumi Ashikawa

A temperature sensor element has such a structure as, when reinforcing lead wires on internal electrodes with a paste, one side surface of each of the lead wires is covered with a reinforcement paste and the other side surface is not covered with the reinforcement paste without covering the entire lead wires welded and connected to the internal electrodes. This allows elimination of cause of cracks generating, thereby securing sufficient joining strength and reinforcement of conductivity of the internal electrodes and the lead wires, and securing connection strength between the lead wires and the internal electrodes.

Platinum temperature sensor element

Internal electrodes, a protective film, and protective films covering the top parts of internal electrode sides of lead wires are formed on a top surface of a substrate of a temperature sensor element, thereby making the overall shape a quadrangular prism and the transverse cross-section nearly a square even at any portion in the axial direction. A heating part of the temperature sensor element is provided near the center along the length, the height, and the width of the element, thereby preventing deviation of heat generation and stabilizing heat release to the lead wires. This allows the temperature sensor element to suppress fluctuation in detected temperatures due to mounting angle.

Growing community of inventors

Tokyo, Japan

Ryusuke Suzuki