Charles E Irwin

US Patent:

46071857, Aug 19, 1986

Filed:

Feb 1, 1985

Appl. No.:

6/697277

Inventors:

Lawrence E. Elbert - Huntington Beach CA
Charles S. Irwin - Santa Ana CA

Assignee:

American Hospital Supply Corporation - Evanston IL

International Classification:

H01L 4108

US Classification:

310323

Abstract:

An ultrasonic horn assembly, particularly suitable for dissolving reagent tablets in a liquid solution in a cuvette which is moved along a path next to the front end face of the horn, includes a generally cylindrical converter fixed to a rear end face of the horn body substantially medial of the length of the rear end face. A pair of elongate resonating members are each fixed at one end to a different side end region of the rear end face on the horn body, and extend perpendicularly from the rear end face. The resonating members cause acoustic waves to propagate from the front end face of the horn body at substantially uniform amplitude along the length of the front end face, so that objects such as cuvettes moving parallel to the front end face are continuously subjected to uniform acoustic waves to insure a thorough dissolving or mixing operation.

US Patent:

45012857, Feb 26, 1985

Filed:

Apr 5, 1982

Appl. No.:

6/365569

Inventors:

Charles Irwin - Santa Ana CA
Janet Devine - Downingtown PA
Richard Kramer - Wilmington DE

Assignee:

Sonobond Ultrasonics, Inc. - PA

International Classification:

B08B 312

US Classification:

134 58R

Abstract:

Ultrasonic transducer apparatus for cleaning applications and method for cleaning wafers of semiconductor material in which the method includes positioning the wafer proximate to but closely spaced away from a cleansing face of the ultrasonic transducer, supplying space between the cleansing face and the wafer with a cleansing fluid through an orifice in the cleansing surface and ultrasonically vibrating the cleansing face transversely to the wafer by applying an electrical signal to piezoelectric material symmetrically disposed about the orifice in the cleansing face via which the cleansing fluid is supplied, with the ultrasonic transducer including piezoelectric material symmetrically disposed with respect to the orifice in the cleansing face through which the cleansing fluid is supplied. The piezoelectric material is preferably in the form of a plurality of discreet piezoelectric elements which are provided with an input signal via a common input terminal where all of the plurality of piezoelectric elements are mechanically coupled to the cleansing face so that the piezoelectric elements, the mechanical coupling structure and a cleansing face ultrasonically vibrate as a single integral structure.