INTERNAL COMPONENT FEATURES IN ACOUSTIC 3D.

The article discusses the internal component features in acoustic three-dimensional (3D) image. These nclude c-mode imaging, time difference imaging, and c-mode imaging with software stacking. In grayscale C-mode imaging, areas of the mold compound that are well bonded to the die till appear medium gray. Acoustic microimaging can produce a 3D image by using a C-mode imaging to scan the entire thickness of the sample in multiple narrow gates.