EMIF08-1005M16 데이터 시트보기 (PDF) - STMicroelectronics

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EMIF08-1005M16

8-line IPAD™ low capacitance EMI filter and ESD protection in QFN package

STMicroelectronics 

EMIF08-1005M16

Solder paste

Figure 13. Recommended stencil opening dimensions

5µm

5µm

15 µm

350 µm

390 µm

190 µm

200 µm

2600 µm

15 µm

0.40

0.20

0.60

0.35

50 µm

2.60

1820 µm

50 µm

390 µm

Footprint

Stencil window

Footprint

0.275

3.2

Solder paste

1. Halide-free flux qualification ROL0 according to ANSI/J-STD-004.

2. “No clean” solder paste is recommended.

3. Offers a high tack force to resist component movement during high speed.

4. Solder paste with fine particles: powder particle size is 20-45 μm.

3.3

Placement

1. Manual positioning is not recommended.

2. It is recommended to use the lead recognition capabilities of the placement system, not the outline centering

3. Standard tolerance of ±0.05 mm is recommended.

4. 3.5 N placement force is recommended. Too much placement force can lead to squeezed out solder paste

and cause solder joints to short. Too low placement force can lead to insufficient contact between package

and solder paste that could cause open solder joints or badly centered packages.

5. To improve the package placement accuracy, a bottom side optical control should be performed with a high

resolution tool.

6. For assembly, a perfect supporting of the PCB (all the more on flexible PCB) is recommended during solder

paste printing, pick and place and reflow soldering by using optimized tools.

3.4

PCB design preference

1. To control the solder paste amount, the closed via is recommended instead of open vias.

2. The position of tracks and open vias in the solder area should be well balanced. A symmetrical layout is

recommended, to avoid any tilt phenomena caused by asymmetrical solder paste due to solder flow away.

DS4994 - Rev 3

page 9/13

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