Patent ID: 11895776
Assignee: HITACHI, LTD.
Field: Measurement (Instruments)
Classification: CPC H  G | IPC G  H

Claim 24:
25. A mass flow controller comprising:
a pressure sensor comprising:
a flexible printed wiring board; and
a strain sensor;, wherein the flexible printed wiring board comprises:
an insulation substrate comprising a first surface that is a surface on which said strain sensor is mounted and a second surface that is a surface located on an opposite side of said first surface;
one or more first electrical conduction patterns which are prepared on said first surface and include first electrode parts arranged at positions where the first electrode part can be electrically connected with a bump of said strain sensor in a mounted state that is a state where said strain sensor is mounted on said first surface;
one or more through holes drilled in said insulation substrate, and
one or more second electrical conduction patterns prepared on said second surface;
wherein:
at least a part of said first electrical conduction patterns further comprise a first electrical conduction part that is a part for electrically connecting said first electrode part with said through hole;
at least a part of said first electrical conduction patterns and at least a part of said second electrical conduction patterns are electrically connected with each other through said through holes; and
said first electrical conduction patterns are prepared only inside a mounting region that is a region opposite to said strain sensor in said mounted state; and
means for monitoring pressure of fluid by said pressure sensor.