Electronics Forum | Sat Dec 17 11:45:40 EST 2005 | DAM
You know, many SMD components have copper alloy leads and then a copper (or Ni) barrier on them. On the copper (or Ni) barrier there is the finish. Usually the finish is made of Sn\Pb (tin-lead), and if I solder with a Sn\Pb solder paste it's all rig
Electronics Forum | Tue Feb 27 10:26:19 EST 2001 | jcboetcher
Hi I'm a first time user of SMTnet. I have a Electrovert Wave Soldering Machine Ultra 2000 with a AT&T Spray Fluxer. I'm looking for a upgrade or a replacement Spray Gum Binks Model No. Z-6-434 and or nozzles ( Fluid tip assembly No. 184A / 156A.
Electronics Forum | Sun Apr 13 19:50:20 EDT 2003 | yukim
Hi, We are placing (+) & (-) terminals in SMT. We have just changed the plating of them: from Nickel to Tin (Sn). During the trial, we used the same reflow profile as before changing, and the solder seems different: a bit cold, with some solder paste
Electronics Forum | Thu Oct 17 21:32:28 EDT 2002 | davef
Please help to clairify the problem. Are we talking: * A pre-reflow [placement] problem? * A post-reflow [solder wetting] problem? Is the wetting issue that you mention related to the board or to the component? Please give us a little more detail
Electronics Forum | Wed Feb 07 17:05:48 EST 2007 | dsoohoo
Thanks Russ and Dave. Russ- I was planning on thoroughly cleaning out the remainder of the low temp solder and going back to 63/37 for re-installation of a new device (our company does not ever re-use a device). Given these circumstances, would you
Electronics Forum | Tue Sep 28 09:15:03 EDT 2004 | DenisM
Can anyone share with me the price you pay for LF solder paste? I have a chinese brand on hand that is purported to reflow well in air and leave shiny joints and minimal solder balls. It does not flow like lead based solder of course, nothing does.
Electronics Forum | Tue May 09 09:49:15 EDT 2000 | paul richardson
Can someone give me DPMO numbers that are considered "world class" (if there is such a number) for... a)solder joints b)placement I appreciate any input that will get me closer to a number that will appease the bosses AND be realistic.
Electronics Forum | Wed Feb 16 14:50:46 EST 2005 | Valerie
You could have a supplier problem. We had a similiar problem with one of our capacitor suppliers. I would suggest doing a solderability test on the component right out of the tape.
Electronics Forum | Thu Dec 07 14:17:03 EST 2006 | russ
I would bet that it is a SMT adhesive used to ensure that the BGA does not move during a secoindary reflow prcess. this glue is easily removed with a soldering iron. Russ
Electronics Forum | Mon Dec 03 11:44:14 EST 2007 | stepheniii
I've done a couple fiducial transplants from populated boards to non-populated boards in the past. I've also used a soldering iron on irregular shaped HASL fids to round them out. And that is a vintage rant.
