
CM1220
APPLICATION INFORMATION
Table 5. PRINTED CIRCUIT BOARD RECOMMENDATIONS
Parameter
Pad Size on PCB
Pad Shape
Pad Definition
Solder Mask Opening
Solder Stencil Thickness
Solder Stencil Aperture Opening (laser cut, 5% tapered walls)
Solder Flux Ratio
Solder Paste Type
Pad Protective Finish
Tolerance ? Edge To Corner Ball
Solder Ball Side Coplanarity
Maximum Dwell Time Above Liquidous (183 ° C)
Maximum Soldering Temperature for Lead ? free Devices using a Lead ? free Solder Paste
Value
0.240 mm
Round
Non ? Solder Mask defined pads
0.290 mm Round
0.125 ? 0.150 mm
0.300 mm Round
50/50 by volume
No Clean
OSP (Entek Cu Plus 106A)
± 50 m m
± 20 m m
60 seconds
260 ° C
Non ? Solder Mask Defined Pad
0.240 mm DIA.
Solder Stencil Opening
0.300 mm DIA.
Solder Mask Opening
0.290 mm DIA.
Figure 2. Recommended Non ? Solder Mask Defined Pad Illustration
Figure 3. Lead ? free (SnAgCu) Solder Ball Reflow Profile
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