Thermosonic wire bonding is an electrical interconnection technique using a combination of pressure, ultrasonic energy and heat to produce a solid-state weld. It is the most common method of establishing electrical contact between integrated circuits and substrates. This is usually achieved by bonding thin gold wire between the components. The resulting connections are called wire bonds. Presently, more than 95% of semiconductor chips are ultrasonically welded using this highly flexible and inexpensive technique.
Thermosonic tailless ball and stitch bonding is the most widely used assembly technique in the semiconductors to interconnect the internal circuitry of the die in the external world.
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The ball bonding process starts off with the wire clamp open and a free air ball at the end of the wire, which is protruding outside the capillary tip.
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Sample Movie -from the Free Air Ball (FAB) to the final Bonding Cycle