Electronics Forum | Tue Nov 24 18:54:36 EST 2009 | gregoryyork
Some companies claimed their lead free solders wouldnt attack stainless steel, frankly they do and they should not be allowed to get away with these claims. Lead Free does not attack Cast iron
Electronics Forum | Fri Nov 27 15:46:28 EST 2009 | jrr3434
Would i be able to use the cast iron pot from my electrovert with out any problems? I thought the tin would dissolve the iron in the pot? This lead free thing is a headache!
Electronics Forum | Tue Nov 24 19:17:29 EST 2009 | gregoryyork
It could be that the Sn96 has dissolved the Tin rapidly and gone for the Copper. What dwell times are they using with the irons? Probably better off using a Tin Copper alloy for reduced dissolution worth a try Cheers Greg
Electronics Forum | Fri Nov 20 15:45:24 EST 2009 | patrickbruneel
Dave was that a no-clean flux residue? And if so alcohol or VOC free (water based)
Electronics Forum | Sat Nov 21 02:04:47 EST 2009 | Sean
Hi Patrick, Sorry, it should be Intel's Southbridge BGA instead of Intel's Northbridge BGA.. Thanks, Sean
Electronics Forum | Sat Nov 21 08:52:22 EST 2009 | davef
Patrick: The flux was OA, but you can get the same result with low residue flux.
Electronics Forum | Sat Nov 21 16:23:05 EST 2009 | davef
Patrick I can only agree with you about low residue (alcohol based) fluxes, providing you apply the amount specified by the supplier. Amounts in excess of the specified amount can have harmful effects.
Electronics Forum | Wed Nov 25 09:40:56 EST 2009 | Sean
Hi Greg, The board is with immersion silver finishing..One of my friend had the same issue even with PCB OSP finishing.. Besides, no white residue found on the top side... Its only appear on the bottom side but no so obvious... Rgds, Sean
Electronics Forum | Wed Nov 25 10:36:28 EST 2009 | gregoryyork
Is this the Nitric Acid Based Silver finish or the Alkali, I think most are Nitric. Have you tested the solder resist as well for porousity. Cheers Greg
Electronics Forum | Mon Dec 07 13:32:53 EST 2009 | ceiaen
Have you considered outsourcing the rework of the BGA? Besides the rework system, you will need: solder paste, stencils, cleaning method, X-ray, and the biggest part experience...
