Recommendation on PCB assembly

ESDA13P70-1U1M

6/10

DocID028170 Rev 1

3

Recommendation on PCB assembly

3.1

Stencil opening design

1.

General recommendation on stencil opening design

a)

Stencil opening dimensions: L (Length), W (Width), T (Thickness).

Figure 14.

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 is 90%.

Figure 15. Recommended stencil window

position

Figure 16. Alternative stencil window

position

Aspect Ratio

W

T

----- 1.5

≥

=

Aspect Area

LW

×

2T L W

+

()

---------------------------- 0.66

≥

=