Datasheet

Recommendation on PCB assembly ESDALC6V1M3
8/12 Doc ID 11555 Rev 5
4 Recommendation on PCB assembly
4.1 Stencil opening design
1. General recommendation on stencil opening design
a) Stencil opening dimensions: L (Length), W (Width), T (Thickness).
Figure 17. Stencil opening dimensions
b) General design rule
Stencil thickness (T) = 75 ~ 125 µm
2. Reference design
a) Stencil opening thickness: 100 µm
b) Stencil opening for leads: Opening to footprint ratio 90%.
Figure 18. Recommended stencil window position
L
T
W
Aspect Ratio
W
T
-----
1.5≥=
Aspect Area
LW×
2T L W+()
----------------------------
0.66≥=
10 µm
400 µm
700 µm
664 µm
380 µm
18 µm
18 µm
10 µm
10 µm
400 µm
380 µm
236 µm
10 µm
7µm
Footprint
Stencil window
Footprint
7µm
T=100 µm
0.70
0.40.4
0.25
0.30
0.20