Patent ID: 11965761
Assignee: HITACHI ASTEMO, LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A thermal flow meter comprising:
a flow rate detection element configured to detect an air flow rate; and
a circuit board disposed such that a part of the circuit board faces a detection surface of the flow rate detection element, wherein
the circuit board is provided with a conductive resin member including a conductive substance and a resin as constituent elements on at least a part of a portion provided in an auxiliary passage on a surface facing the detection surface of the flow rate detection element,
wherein the conductive resin member is a conductive coating film formed in a film shape by being applied to the circuit board,
wherein the conductive coating film is provided so as to seal a conductive portion having a predetermined potential formed on the circuit board.