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STM32F042x4 STM32F042x6
Package information
113
Figure 40. Recommended pad footprint for WLCSP36 package
F
-
0.3025
-
-
0.0119
-
G
-
0.3515
-
-
0.0138
-
aaa
-
-
0.100
-
-
0.0039
bbb
-
-
0.100
-
-
0.0039
ccc
-
-
0.100
-
-
0.0039
ddd
-
-
0.050
-
-
0.0020
eee
-
-
0.050
-
-
0.0020
1. Values in inches are converted from mm and rounded to 4 decimal digits.
2. Back side coating.
3. Dimension is measured at the maximum bump diameter parallel to primary datum Z.
Table 69. WLCSP36 recommended PCB design rules
Dimension
Recommended values
Pitch
0.4 mm
Dpad
260 µm max. (circular)
220 µm recommended
Dsm
300 µm min. (for 260 µm diameter pad)
PCB pad design
Non-solder mask defined via underbump allowed
Table 68. WLCSP36 package mechanical data (continued)
Symbol
millimeters
inches
(1)
Min
Typ
Max
Min
Typ
Max
069
'VP
'SDG