Seiko Epson Corporation

Shigeaki Muramatsu

Masayoshi Yamada

Hikaru Iwai

Toshiya Okada

An ultrasonic device includes an ultrasonic element configured to perform at least one of transmission of an ultrasonic wave along a first axis and reception of the ultrasonic wave input along the first axis, and a protective member provided on the first axis to cover the ultrasonic element. The protective member has a first surface provided with at least one hole through which the ultrasonic wave travelling along the first axis passes, and a second surface intersecting with the first surface and provided with a first opening through which foreign matter entering from the at least one hole is discharged.

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Nagano, Japan

Shigeaki Muramatsu