Patent ID: 11858000
Assignee: SEIKO EPSON CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 0:
1. An ultrasonic device, comprising:
a substrate; and
a vibration plate provided on the substrate and having one or more vibrators configured to generate an ultrasonic wave by vibration, wherein
the vibration plate has a movable portion provided with the one or more vibrators and configured to vibrate accompanying with the vibration of the one or more vibrators, and a fixed portion fixed to the substrate,
the substrate is on a first side of the vibration plate,
the fixed portion has a space portion on a second side of the vibration plate opposite to the substrate, and
a volume of the space portion corresponding to the fixed portion of the vibration plate is set to or smaller than a predetermined volume such that a vibration frequency of a reflected wave based on a wave transmitted from the movable portion and received by the movable portion is outside a vibration frequency band region of the one or more vibrators.