Scanning acoustic GHz-microscopy versus conventional SAM for advanced assessment of ball bond and metal interfaces in microelectronic devices
Acoustic GHz-microscopy is compared to conventional scanning acoustic microscopy. Ball bond and metal interfaces of microelectronic devices are analysed. Outstanding lateral resolution in the 1?m range is demonstrated for the GHz setup. Method allows for 2-dimensional quality assessment of small ball bond interfaces.
acoustic ghz microscopy high resolution sam cu wire bonding cu to cu bond acoustic ball bond inspection