DocID025832 Rev 2
STM32F042xx
Package characteristics
115
Marking of engineering samples for WLCSP36
The following figure shows the engineering sample marking for the WLCSP36 package.
Only the information field containing the engineering sample marking is shown.
Figure 40. WLCSP36 package top view
1. Samples marked “E” are to be considered as “Engineering Samples”: i.e. they are intended to be sent to
customer for electrical compatibility evaluation and may be used to start customer qualification where
specifically authorized by ST in writing. In no event ST will be liable for any customer usage in production.
Only if ST has authorized in writing the customer qualification Engineering Samples can be used for
reliability qualification trials.
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