Patent ID: 11904356
Assignee: HITACHI, LTD.
Field: Measurement (Instruments)
Classification: CPC A  B  G | IPC A  B  G

Claim 0:
1. An ultrasonic transducer including a cavity layer, and a pair of electrodes positioned above and below the cavity layer, the ultrasonic transducer comprising:
insulating layers disposed above and below each of the pair of electrodes; and
a filled hole that penetrates, in a vertical direction, at least a portion of the insulating layers positioned above the cavity layer, wherein
when the ultrasonic transducer is viewed from above, a non-electrode region is provided in each electrode of the pair of electrodes at a position that overlaps the filled hole,
the non-electrode region positioned on a lower side includes a non-electrode portion formed from a material that is identical to a material of the electrode positioned on the lower side, and
an insulation region is formed between the non-electrode portion and the electrode positioned on the lower side.