I've been looking for specifications and/or white papers on the best practices for ensuring the WLCSP is able to be mechanically robust. Are there any documents that detail how much of a bend or flex is allowed in this type of package?
I'm specifically interested in the STM32L486JGY6TR which uses the 72-pin WLCSP with 0.4mm pin pitch. I've checked in the datasheet, reference manual, and app note TN1163 but haven't been able to find anything.
Thanks!
