Nippon Steel Engineering Co., Ltd.

Yuta Ozaki

Shinji Tokumaru

Masaki Ando

Hiromitsu Date

Eri Hoshiba

Nobuyuki Hayashi

Shintaro Obara

An ultrasonic treatment apparatus according to the present invention includes: a treatment tank capable of containing a treatment object and a treatment liquid for immersing the treatment object; and an ultrasonic application mechanism that applies ultrasonic waves to the treatment liquid, wherein the treatment tank has a long axis where cross-sectional shapes are substantially identical to each other, and a wall surface to a scheduled liquid level height line of the treatment liquid is formed by a concave surface, and the ultrasonic application mechanism is installed at a position where an angle &#x3b8; formed by a normal line of an oscillation surface of ultrasonic waves and the scheduled liquid level line of the treatment liquid is 5&#xb0; to 80&#xb0;.

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Tokyo, Japan

Yuta Ozaki