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 10. Stencil opening recommendation

L

T

W

b.

General design rule

◦

Stencil thickness (T) = 75 ~ 125 μm

◦

WT≥1.5

◦

L × W

2TL +W ≥0.66

1.

Reference design

a.

Stencil opening thickness: 80 µm

b.

Other dimensions: see below figure.

Figure 11. Recommended stencil window position, stencil opening thickness: 80 μm

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)

0.243

(0.0096)

BAT30F4

Recommendation on PCB assembly

DS10126 - Rev 8

page 7/11