The automotive industry requires original equipment manufacturers (OEMs) to perform 100% automated visual inspection (AVI) post-assembly to ensure that cars meet the current demands for safety and high reliability. Standard quad-flat no-lead (VQFN) packages do not have solderable or exposed pins/terminals that are easily viewed. It is therefore difficult to determine visually whether or not the package is successfully soldered onto the printed circuit board (PCB). To resolve the issue of side-lead wetting of leadless packaging for automotive and commercial component manufacturers, the wettable-flank process was developed. The wettable flanks on the VQFN package provide a visual indicator of solderability and thereby lower the inspection time and manufacturing costs.

The CC2640R2F-Q1 device is assembled using an automotive-grade VQFN package with wettable flanks.