Patent ID: 8293020
Filing Date: 2012-10-23
Classification: B08B,G03F,H01L

Abstract:
1. A method of megasonic cleaning comprising: providing a bubble generating part including a container, the container having an inlet line through which a cleaning solution enters the bubble generating part and an outlet line through which the cleaning solution passes; providing a cleaning part in communication with the bubble generating part, the cleaning part provided separately from the bubble generating part, the bubble generating part being positioned vertically above the cleaning part; forming microcavitation bubbles in the container of the bubble generating part by applying an electromotive force to the cleaning solution using a megasonic energy, the microcavitation bubbles including stable bubbles of a stable oscillation state and unstable bubbles, the megasonic energy being generated by providing a first power; moving the cleaning solution including the stable and unstable bubbles through the outlet line of the bubble generating part and into the cleaning part; providing a second power into the cleaning part where an object is provided so that the stable bubbles that have moved to the cleaning part maintain the stable oscillation state; and cleaning a surface of the object in the cleaning part using the cleaning solution including at least some of the stable bubbles.