Patent ID: 7306002
Filing Date: 2007-12-11
Classification: B08B,H01L

Abstract:
1. A system for cleaning a substrate comprising: a substrate supporting assembly configured to hold said substrate such that an upper surface and a lower surface of said substrate are exposed; a fluid dispensing device positioned relative to said substrate supporting assembly to dispense a cleaning fluid onto said upper surface of said substrate; an acoustic energy generator positioned relative to said substrate supporting assembly to apply acoustic energy to said lower surface of said substrate, said acoustic energy generator being positioned below said substrate when said substrate is supported by said substrate supporting assembly to apply said acoustic energy directly to said lower surface of said substrate; and a positioning system connected to said acoustic energy generator to selectively position said acoustic energy generator with respect to said substrate, said positioning system being configured to raise and lower said acoustic energy generator to change a vertical distance between said substrate and at least a portion of said acoustic energy generator such that intensity of said acoustic energy at different areas of said substrate can be controlled, said positioning system including multiple positioning shafts connected to said acoustic energy generator, each of said multiple positioning shafts being connected to a shaft drive mechanism to independently displace each of said multiple positioning shafts to raise, lower and tilt said acoustic energy generator with respect to said lower surface of said substrate.