Recommendation on PCB assembly

ESDALC14-1BF4

8/12

DocID024898 Rev 2

3

Recommendation on PCB assembly

3.1

Stencil opening design

1.

General recommendations on stencil opening design

a)

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

Figure 13. Stencil opening dimensions

b)

General design rule

Stencil thickness (T) = 75 ~ 125 µm

2.

Recommended stencil window

a)

Stencil opening thickness: 80 µm

b)

Other dimensions: see Figure 14

Figure 14. Recommended stencil window position, stencil opening thickness: 80 µm

L

T

W

Aspect Ratio

W

T

-----

1.5

≥

=

Aspect Area

LW

×

2T L

W

+

()

----------------------------

0.66

≥

=

0.230

(0.0091)

0.183

(0.0072)

0.170

(0.0067)

0.656

(0.0258)

0.643

(0.0253)

Footprint

Stencil window

0.007

(0.00027)

0.007

(0.00027)

mm

(inches)