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- noun a high-tech welding procedure used for metals (e.g. in wire bonding of integrated circuits) and plastics
- A process in solid-state welding wherein the metal parts are held together under pressure and joined by applying high frequency sound waves to their surface.
- Welding in which ultrasonic waves join surfaces, without the generation of heat. Used, for instance, for surfaces which can not, or should not be heated.
- Welding which is enhanced by ultrasonic waves. The ultrasonic vibrations help remove oxides and otherwise better prepare a surface for welding, making a flux unnecessary.