Patent ID: 11890783
Assignee: DISCO CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B  H | IPC B  H

Claim 2:
3. The production method according to claim 1, wherein
the ultrasonic water ejection nozzle includes
a dome-shaped ultrasonic transducer that has a recessed surface and generates ultrasonic vibrations when supplied with high-frequency electric power,
a ring-shaped plate extending outward from an outer periphery of the ultrasonic transducer, and
a box supporting the ring-shaped plate and having a water-holding portion that holds water on a side of the recessed surface of the ultrasonic transducer, a water supply port that supplies water to the water-holding portion, and an ejection bore that opposes the recessed surface of the ultrasonic transducer and ejects the water from the water-holding portion, and

the wafer production step includes supplying the high-frequency electric power to the ultrasonic transducer so as to form, in the ejection bore, a point of concentration of the ultrasonic vibrations generated from the ultrasonic transducer.