Murata Manufacturing Co., Ltd.

Tetsuya Kawamoto

Minoru Shimada

Asami Wakabayashi

Kingo Ohmura

Hiroyuki Kobayashi

Hideki Yamada

Yoshiyuki Yamashita

Tatsuya Yoshimura

Temperature sensors are produced by first producing temperature sensing elements each having electrodes on its mutually oppositely facing main surfaces, next forming a lead frame comprising a linearly elongated base part and a plurality of pairs of planar lead parts extending perpendicularly from said base part, twisting each of these planar lead parts such that each of the pairs has top end parts which face each other with a gap therebetween, inserting one of the temperature sensing elements between the mutually facing top end parts of each pair in the corresponding gap and electrically connecting the electrodes on the inserted temperature sensing element individually to the top end parts of the corresponding pair, and cutting each of the planar lead parts from said base part to form lead terminals of specified lengths for the temperature sensors. Each of the planar lead parts is provided with a semicircular kinked part distal from the top end part such that the kinked parts of each of the pairs of planar lead parts are bent in a same direction with respect to each other and in a side-by-side relationship.

Method of producing temperature sensor and mounting same to a circuit board

A temperature sensor has lead lines made of an elastic material each attached to a corresponding one of electrodes on a temperature sensing element such as an NTC thermistor element. The lead lines may each have a non-straight part where they are bent or deformed into a semi-circular shape such that, when these lead lines are inserted into throughholes prepared through a circuit board, the non-straight parts are hooked at the throughholes and the portions of the lead lines above the circuit board will stand up obliquely. Instead of lead lines, a pair of elongated planar lead terminals each with a twisted top end part may be connected to the electrodes such that the top end parts of the pair of lead terminals face each other and can support the temperature sensing element more securely in between.

Temperature sensor

An electronic device of a kind having an electronic element with a main body, terminal electrodes on the main body and lead terminals electrically connected individually to the terminal electrodes has at least a portion of the outer surfaces of the lead terminals covered with a coating resin composition containing as its resin component a saturated copolymerized polyester resin which can be dissolved in an organic solvent such that the mechanical strength of the lead terminals is improved and the insulation of the device is not compromised during its manufacture or mounting.

Electronic device having lead terminals coated with resin

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Shiga, Japan

Tetsuya Kawamoto