Patent ID: 11953357
Assignee: MMI SEMICONDUCTOR CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. A flow sensor chip comprising: a substrate in which a cavity having an opening is formed; a membrane provided on a surface of the substrate so as to cover the opening; a heater provided inside the membrane; a first thermopile and a second thermopile provided in the membrane, the heater being interposed between the first thermopile and the second thermopile; a heat conduction member serving as a heat conduction path between the substrate and the membrane, wherein a first hot junction and a first cold junction of a thermocouple provided in the first thermopile and a second hot junction and a second cold junction of a thermocouple provided in the second thermopile are arranged at positions overlapping with the opening as viewed from a direction normal to the surface of the substrate; the heat conduction member includes: a first heat conduction member serving as a heat conduction path between the first cold junction and the substrate; and a second heat conduction member serving as a heat conduction path between the second cold junction and the substrate; and wherein the heat conduction member is constituted by a metal material containing at least one element selected from the group consisting of aluminum, titanium, copper, tungsten, molybdenum, and tantalum.