PRELIMINARY
CM1426
Application Information
Refer to Application Note AP-217, "The Chip Scale Package", for a detailed description of Chip Scale Packages
offered by California Micro Devices.
PRINTED CIRCUIT BOARD RECOMMENDATIONS
PARAMETER
VALUE
0.275mm
Pad Size on PCB
Pad Shape
Round
Pad Definition
Non-Solder Mask defined pads
0.325mm Round
0.125mm - 0.150mm
0.330mm Round
50/50 by volume
No Clean
Solder Mask Opening
Solder Stencil Thickness
Solder Stencil Aperture Opening (laser cut, 5% tapered walls)
Solder Flux Ratio
Solder Paste Type
Pad Protective Finish
OSP (Entek Cu Plus 106A)
+50μm
Tolerance — Edge To Corner Ball
Solder Ball Side Coplanarity
+20μm
Maximum Dwell Time Above Liquidous (183°C)
Maximum Soldering Temperature for Eutectic Devices using a Eutectic Solder Paste
Maximum Soldering Temperature for Lead-free Devices using a Lead-free Solder Paste
60 seconds
240°C
260°C
Non-Solder Mask Defined Pad
0.275mm DIA.
Solder Stencil Opening
0.330mm DIA.
Solder Mask Opening
0.325mm DIA.
Figure 10. Recommended Non-Solder Mask Defined Pad Illustration
250
200
150
100
50
0
1:00.0
2:00.0
3:00.0
4:00.0
Time (minutes)
Figure 11. Eutectic (SnPb) Solder
Ball Reflow Profile
Figure 12. Lead-free (SnAgCu) Solder
Ball Reflow Profile
© 2005 California Micro Devices Corp. All rights reserved.
10 490 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.calmicro.com
08/30/05
CALMIRCO [ CALIFORNIA MICRO DEVICES CORP ]
