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Written by Paul Lotosky
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Monday, 01 February 2010 00:00 |
 Vibrations can weaken the solder joint.Rough or disturbed solder is a solder fillet that solidified while one or both metals to be joined were vibrating. The result is a weak, non-uniform metallic structure with many micro-cracks.
Primary process setup areas to check: - Check conveyor for vibration or “jerky motion.”
- Removal of the board prior to the solder solidifying.
Other things to look for in the process:
- Solder temperature too low.
- Conveyor speed high.
- Solder wave height low.
- Conveyor vibration.
- Solder wave uneven.
- Early removal of board.
- Solder contaminated.
- Board not seated right.
- Excessive solder dross.
- Flux applied unevenly.
Things to look for with the board design:
Paul Lotosky is global director - customer technical support at Cookson Electronics (cooksonelectronics.com);
This e-mail address is being protected from spambots. You need JavaScript enabled to view it
. His column appears monthly.
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Last Updated on Tuesday, 09 February 2010 20:27 |
