Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


lead-free mixed technolgy

#26281

lead-free mixed technolgy | 6 November, 2003

hi, NEMI recommends separate solders for reflow sodlering and wave soldering. Reflow soldering- Sn-3.9Ag-0.7Cu Wave sodlering- Sn-0.7CU Wavesoldering- Sn-0.7Ag What will happen if a mixed technolgy PCb board containing both through hole and surface mount components is used. WIll the manufacuters use two different solders...also how will the board handle two different solders if they are to be used like that.

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CAL

#26291

lead-free mixed technolgy | 7 November, 2003

From my understanding (and I am not a metalurgist)Most Lead free solders can be intercahngeable.The alloy created should be stable. The issue is if you add Leaded solder to the joint. Obviously, research and testing is still pending. cal

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CAL

#26293

lead-free mixed technolgy | 7 November, 2003

thanks cal

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Plasma Prior to Conformal Coating