Datasheet

DocID028094 Rev 5 121/142
STM32F410x8/B Package information
139
WLCSP36 device marking
The following figure gives an example of topside marking orientation versus ball A1 identifier
location.
Other optional marking or inset/upset marks, which identify the parts throughout supply
chain operations, are not indicated below.
Figure 43. WLCSP36 marking example (package top view)
1. Parts marked as “ES”, “E” or accompanied by an Engineering Sample notification letter, are not yet
qualified and therefore not yet ready to be used in production and any consequences deriving from such
usage will not be at ST charge. In no event, ST will be liable for any customer usage of these engineering
samples in production. ST Quality has to be contacted prior to any decision to use these Engineering
samples to run qualification activity.
Table 80. WLCSP36 recommended PCB design rules (0.4 mm pitch)
Dimension Recommended values
Pitch 0.4 mm
Dpad 0.225 mm
Dsm
0.290 mm typ. (depends on the soldermask
registration tolerance)
Stencil opening 0.250 mm
Stencil thickness 0.100 mm
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