I have asked internally regarding this and will get back to you soon. Kindly expect a delay since it's the holiday season and we are short staffed at the moment.
I have heard back from our team: The strain limit is 4000µε (LTPD=3.09% with 90% confidence)
Simplified monotonic bending test flow:
mount daisy-chain IC on specific PCB for bending test.
mount few strain gauges on PCB close to the IC.
bend the PCB and real-time monitor the strain & daisy-chain resistance.
test-to-fail mode: bend the PCB till DC resistance meets failure criteria and record the strain. test-to-target mode: stop bending when target strain reached and record DC pass/fail results.
