Patent ID: 6619305
Filing Date: 2003-09-16
Classification: B08B,G11B,H01L,Y10S

Abstract:
An apparatus for treating surfaces of a workpiece with ultrasonic energy, comprising:(a) a chamber defining an interior space for containing therein a liquid, said chamber comprising a bottom wall and a first pair of opposing, longitudinally extending sidewalls connected by a second pair of opposing, transversely extending sidewalls; (b) an ultrasonic wave energy applying means for supplying ultrasonic wave energy to a liquid contained within said interior space of said chamber, said ultrasonic wave energy applying means including a planar transducing surface forming at least a portion of a first one of said second pair of opposing, transversely extending sidewalls; (c) a workpiece mounting means within said interior space of said chamber for mounting therein a workpiece; (d) ultrasonic energy reflecting means located within said interior space; and (e) movable partition means transversely extending at least partway between said first pair of opposing, longitudinally extending sidewalls for adjustably partitioning said interior space into first and second sub-spaces each extending for a desired, adjustable length along said first pair of longitudinally extending sidewalls, said movable partition means being comprised of a material which is partially reflective and partially transmissive of ultrasonic wave energy; and said workpiece mounting means (c) is adapted to be selectively positioned in either said first sub-space or said second sub-space.