Hello Technetters,

I have a PCBA which has been built in PTH configuration with great
success for years.  However, due to the need for increased functionality
in the same form factor, it seems that it is time to convert the PCBA to
SMT format.

My main concern relates to PCB flex and solder joint integrity...

The PCBA is about 4" x 6".  It is held along its 4" sides in a rack.  A
cable is plugged into the card via a connector along the top 6" side of
the PCB (NOT a card edge connector, but PTH connector which means you
push against the FACE of the PCBA.  I do not know the force, but the PCB
DOES flex significantly.  Plus, since this is a home / contractor
product, it does not get handled gingerly...

THE PRIMARY CONCERN: Inducing cracks in either the components or solder
joints of leadless surface mount components.

What information exists with respect to this subject?


What testing makes sense?  What has been done already by others?


Any help is appreciated.

Thanks,

Michael Lang
[log in to unmask]


ps. Hi RH!

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