Forum Discussion
Altera_Forum
Honored Contributor
16 years agoexposed 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
Honored Contributor
16 years agoHi,
I'm afraid, but I think the exposed Pad makes manual soldering of the EQFP impossible, this chip package requires either reflow soldering or vapour phase soldering (or a professional rework center). Soldering the exposed pad requires the package itself and the PCB to be heated up to the solder liquid temperature by a profile not exposing the die too long by too high temperatures. I did a lot soldering on the "good old" TQFP myself and thus I'm not really amused on the exposed Pad.. I did rework on smaller packages of switch-mode regulator with "pad on botttom" with heatgun, this physically soldered the device but I'm quite sure I shorted this device's lifetime by this temperature treatment... CU, Carlhermann