Simple Methods to Improve the CSAM Thru-Scan Efficiency on Package Units

CSAM analysis is one of the widely used non-destructive FA techniques. When the CSAM thru-scan mode is needed for a large number of package units, the current tray scan feature may not meet the needs due to its limitations. In this paper, we introduced some simple methods to overcome these limitations under different scenarios, in order to improve the CSAM thru-scan inspection throughput and efficiency. The solutions are proved to be successful and can be applied to similar occasions, especially for those irregular units.