Hitachi Astemo Ltd.

Mizuki Ijuin

Takayuki Yogo

Hiroyuki Abe

Binti Haridan Fatin Farhanah

Akira Uenodan

Nozomi Yatsumonji

The objective of the present invention is to obtain a flow rate measurement device capable of reducing variations in the flow rate detection accuracy by suppressing the inclination of a chip package relative to a circuit board. A flow rate measurement deviceof the present invention includes a chip packagehaving a flow rate sensorand a passage wallformed therein, and a circuit boardon which the chip packageis mounted, in which the chip packageis mounted such that the flow rate sensorfaces a portion of the circuit boardand a portion of the passage wallas a resin portion of the chip packagecontacts the circuit board

Flow rate measurement device

To provide an airflow amount measuring device capable of accurately measuring a flow amount of air without occurrence of warpage in a thin film portion when an airflow measuring element is mounted on a lead frame to form a resin-sealed package in which the airflow amount measuring element and the lead frame are sealed. A chip package includes a lead frame, an element mounted on the lead frame and having a detection portion, and a structure for sealing the lead frame and the element such that at least the detection portion is exposed. Then, the curvature radius ρ of the exposed portion of the element exposed from the sealing resin member is 2.13 or less.

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Hitachinaka, Japan

Mizuki Ijuin