Sonic cleaning with an interference signal
An array of ultrasonic or megasonic transducers is used to clean a substrate. An interference signal that is the superposition of the signals from each transducer enhances the cleaning. The system improves cleaning by providing a higher intensity beam than is available from uncoupled transducers to...
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| creator | OKORN-SCHMIDT HARALD F FISCH EMILY E GALE GLENN W SYVERSON WILLIAM A |
| description | An array of ultrasonic or megasonic transducers is used to clean a substrate. An interference signal that is the superposition of the signals from each transducer enhances the cleaning. The system improves cleaning by providing a higher intensity beam than is available from uncoupled transducers to facilitate removal of smaller particles. In addition, the beam can be swept across the substrate to provide a uniform cleaning of the entire surface, avoiding dead spots. The system can be adapted for use in a vessel or for single wafer processing with a stream of fluid or a puddle of fluid. |
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An interference signal that is the superposition of the signals from each transducer enhances the cleaning. The system improves cleaning by providing a higher intensity beam than is available from uncoupled transducers to facilitate removal of smaller particles. In addition, the beam can be swept across the substrate to provide a uniform cleaning of the entire surface, avoiding dead spots. 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| subjects | ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR BASIC ELECTRIC ELEMENTS CLEANING CLEANING IN GENERAL ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PERFORMING OPERATIONS PHYSICS PREVENTION OF FOULING IN GENERAL SEMICONDUCTOR DEVICES SOUND-PRODUCING DEVICES TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS TRANSPORTING |
| title | Sonic cleaning with an interference signal |
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