Patent ID: 8899247
Filing Date: 2014-12-02
Classification: B06B,B08B,H01L,Y10S

Abstract:
1. An ultrasonic cleaning apparatus comprising: a cleaning bath that stores an object to be cleaned and cleaning solvent; a plurality of oscillating elements attached to the cleaning bath; a plurality of oscillators connected respectively to the plurality of oscillating elements for exciting the plurality of oscillating elements, wherein each of the plurality of oscillators is respectively provided with a signal generation circuit which generates a signal and an electric power amplifying circuit which amplifies and outputs the signal generated by the signal generation circuit to a corresponding one of the plurality of oscillating elements to excite said corresponding one of the plurality of oscillating elements; a plurality of power sources which are respectively connected to the plurality of oscillators for supplying electric power to the plurality of oscillators; and a single controller which is connected to the plurality of signal generation circuits of the plurality of oscillators and which controls the plurality of signal generation circuits to output signals of substantially a same phase to the plurality of oscillating elements by outputting a synchronization pulse to the plurality of signal generation circuits so as to synchronize the signals outputted from the plurality of signal generation circuits; wherein the single controller which is connected to the plurality of signal generation circuits of the plurality of oscillators outputs an oscillation start timing pulse, and outputs the synchronization pulse at certain time intervals irrespective of an operating state of the oscillators after having started the oscillation.