Patent ID: 7765865
Filing Date: 2010-08-03
Classification: G01F

Abstract:
1. A flow sensor unit which detects a flow rate of a measurement target fluid, comprising: a flow sensor having: a sensor chip in which a flow rate detecting section is formed on an electric insulating film applied to cover at least a part of a concave portion formed on an upper surface of a substrate; and a flow path forming member which is provided on the sensor chip and has a flow path of the fluid flowing through the flow rate detecting section formed therein; a metal flow path body which accommodates the flow sensor and has an accommodating portion accommodating the flow sensor in a state where an inner peripheral surface of the flow path body is separated from an outer peripheral portion of the flow sensor formed therein; a metal attachment plate which is fixed to the flow path body so as to accommodate the flow sensor in a state where the flow sensor is fixed and held in the accommodating portion of the flow path body; and an insulating member which is interposed between the sensor chip of the flow sensor and the attachment plate, bonded to the sensor chip, and also bonded to the attachment plate.