Patent ID: 6222305
Filing Date: 2001-04-24
Classification: B06B,B08B,G10K,H01L,Y10S

Abstract:
A megasonic cleaning system comprising:a container having a fluid chamber for holding a volume of cleaning solution;a resonator selected from the group consisting of sapphire, quartz, silicon carbide, silicon nitride and ceramic, the resonator having an interface surface which abuts the fluid chamber so that the interface surface is in contact with at least some of the volume of cleaning solution when the volume of cleaning solution is present in the fluid chamber;a piezoelectric crystal for generating acoustic energy in the frequency range of 0.4 to 2.0 MHz when power is applied to the piezoelectric crystal; anda bonding layer comprised of indium positioned between the resonator and the piezoelectric crystal for attaching the piezoelectric crystal to the energy transmitting member.