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

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


SMT Rework for metal core PCB's

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#65699

SMT Rework for metal core PCB's | 3 January, 2012

We are working with .065" thick metal core PCB's. I have a couple boards that are in need of rework. The components we are placing are similar to a SOJ package with a solder pad underneath the component. We are also using a lead free process. I have a hot plate and a hot air desoldering rework station, but so far I'm not having any success removing the components. The metal core board acts as a heat sink, and pulls away all the heat from where I'm attempting the rework. Anyone out there have any suggestions?

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#65700

SMT Rework for metal core PCB's | 3 January, 2012

Try using Chip Quik to reduce the heat required for component removal. Along with your bottom pre-heater, use a temperature controlled hot air system to help heat up top side for component installation.

http://www.pcb-repair.com/products.htm

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#65716

SMT Rework for metal core PCB's | 5 January, 2012

The high thermal mass of metal core boards makes them difficult to heat with hot air convection heating or IR. So, edge heaters are used for effective heating of heavy core circuit boards.

Hakko and VJ Electronix offer edge heaters. We imagine other rework station suppliers offer this equipment as well.

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