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Altera_Forum's avatar
Altera_Forum
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16 years ago

exposed pad in EQFP package

Hi, I have a problem with the exposed pad in the EQFP 144pin package. What is the correct way the connect the exposed pad to the PCB ? I cannot simple solder it because it has height a...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Exposed pad packages can be most easily soldered with solder paste on a hot plate or other reflow techniques used in production. When using hot air from the top, the board should be preheated. Also you have to avoid local package overheating with too small nozzles.

For prototype boards, designing one large (3-4 mm drill) through-plated via in the pad center allows to solder the pad with an iron tip.

I don't understand about the "height issue".