Ultrasonic soldering

Ultrasonic soldering is a flux-less soldering process that uses ultrasonic energy, without the need for chemicals to solder materials, such as glass, ceramics, and composites, hard to solder metals and other sensitive components which cannot be soldered using conventional means. Ultrasonic (U/S) soldering, as a flux-less soldering process, is finding growing application in soldering of metals and ceramics from solar photovoltaics and medical shape memory alloys to specialized electronic and sensor packages. U/S soldering has been reported since 1955 as a method to solder aluminum and other metals without the use of flux.