Patent ID: 11940347
Assignee: DENSO CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 2:
3. The pressure sensor according to claim 1, wherein
the strain detecting element has a plurality of gauge resistors composed of the polysilicon and whose resistance value changes according to deformation of the diaphragm, and a wiring layer connecting the gauge resistors so as to form a bridge circuit, and a pad portion composed of an electrode film and connected to the wiring layer,
the wiring layer has a connecting portion for connecting adjacent gauge resistors so as to form the bridge circuit, and an extending portion drawn out from the connecting portion,
a protective film covers the strain detecting element, and has an opening for exposing the pad portion on the diaphragm, and
the opening is formed inside the extending portion in a normal direction with respect to a surface direction of the diaphragm without intersecting an end of the extending portion.