Sonoscan was granted US Patent #6,895,820 covering the  Virtual Rescanning Module (VRM).
 
The VRM technique permits engineers to acquire and save acoustic echo data from the entire volume of a part such as an integrated circuit package. The saved digital file can later be rescanned to make acoustic images as though the file were the physical IC package.
 
VRM is widely used to preserve data about parts before they go into production or into testing.  After a part has been altered by heat, testing or other factors, it is no longer too late to examine the part in its original condition.
 
In advanced flip-chip production, VRM is used with the patented Sonoscan method for Frequency Domain Imaging (FDI) to perform high-resolution non-destructive analysis of critical flip-chip interfaces.
                                                                       
Sonoscan Inc., sonoscan.com

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