Electronics Forum | Tue Jul 25 14:30:04 EDT 2017 | emeto
Looks like you have a great wetting of your paste :). Once body has been in contact with molten solder, the package could suffer damages on the body(outside and inside) and on the circuitry inside. It is considered a defect. I have seen that before a
Electronics Forum | Tue Jul 25 16:59:54 EDT 2017 | spitkis2
Is anyone reworking BGA parts with an rf shield on top of the package? Any problems getting it off the board? I am running into an issue in that the shield comes off but the part remains on the board - not because solder has not reached melting but
Electronics Forum | Fri Oct 30 08:24:12 EDT 2009 | rajeshwara
thnx davef & all With the help of all at last i solved the problem , The vias are not caped from bottom , so solder paste draining through the via to the floor which creates voids between IC ground pad and e-pad. Tnhx all again
Electronics Forum | Thu Jul 20 15:37:53 EDT 2000 | Tekguy2000
These parts are flat chip resistor arrays that have 4 end terminations on each side. It looks liek an IC but is typically in an 0805 and 1206 package type with convex terminations. .031" pitch from termination to termination and .011" spacing between
Electronics Forum | Thu Jul 20 13:57:04 EDT 2000 | Boca
I am not answering for Techguy2000, but I am chiming in here, I have the same problem. Our resistor packs are ceramic body with no leads, they have a metalized area reminicent of the old castelation leads of year gone by. The lead pitch is 50 mil
Electronics Forum | Thu Feb 08 08:15:28 EST 2007 | tjcrume
I have received 10 customer returns for a cold solder joint on 1 lead of a 36 pin IC. Everytime it is on the #18 pin. The process is reflow and I can't figure out why the one leg is cold and the other legs look OK.
Electronics Forum | Thu Feb 08 08:54:56 EST 2007 | jhaviland
groundplane not heating properly.. Is it a J leaded IC? sometimes these get bent slightly in the packaging and sit just far enough off the board to cause solder problems.
Electronics Forum | Thu Feb 08 09:41:23 EST 2007 | SWAG
Check the bare board - could also be an unmasked via on the heel of the pad that is sucking solder into it.
Electronics Forum | Tue Nov 27 07:36:29 EST 2007 | shy
solder the part is for SMT component (located at top side and bottom side) and wave solder is for THP (located at top side only).
Electronics Forum | Tue Nov 27 06:11:42 EST 2007 | shy
Hi Loco, my PCBA got top side and bottom side and 90% SMT and 10% THP (top side) which need to be cover by wave solder. And that's why i need to go through reflow and wave.
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