Patent ID: 11874159
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. An ultrasonic sensor comprising:
a piezoelectric element; and
a plurality of acoustic matching layers including a first acoustic matching layer laminated and bonded to the piezoelectric element,
wherein the first acoustic matching layer includes a thermoplastic resin, and
the thermoplastic resin is injected to the first acoustic matching layer from a thickness direction of the first acoustic matching layer,
the piezoelectric element is a rectangular parallelepiped having a rectangular bonding surface,
the first acoustic matching layer has a flow direction caused by injection of the thermoplastic resin, and
the piezoelectric element and the first acoustic matching layer are laminated and bonded together with the flow direction being matched in parallel with a longitudinal direction of the piezoelectric element.