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LGA Rework

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#73719

LGA Rework | 19 March, 2015

Hi,

I need to replace a LGA component from assembled boards.

What are the best methods (automated ones preferred) for this process?

The main issue is how to apply solder paste for the fine pitch (0.4mm) on assembled board.

Thanks, Eliran Ave

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#73720

LGA Rework | 19 March, 2015

We remove the LGA, clean the pads, "re-ball" the LGA by solder-printing it, reflow and re-install it on board as BGA. That way, we don't need to apply solder paste on board. It works !!!

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#73747

LGA Rework | 27 March, 2015

We reflow solder balls to the LGA using a tacky paste flux. Then we install the LGA to the PCB using a tacky paste flux. This will result in zero voiding and is a preferred method of our Military and Space clients. Be sure to read your spec sheet for your component. Some LGA's are heat sensitive and require reflow temperatures of less than 250C.

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#73755

LGA Rework | 31 March, 2015

There is a useful PDF on the Freescale website about reworking LGA's that you might find helpful. It's at cache.freescale.com/files/32bit/doc/package_info/AN2920.pdf

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