Electronics Forum | Tue Apr 09 05:36:27 EDT 2002 | lhudson1
Silver in the paste is present to minimise any negative effects of silver in the pcb finish or component terminations. 2% Ag prevent silver leaching thus giving a more reliable joint.
Electronics Forum | Tue Apr 29 11:19:09 EDT 2003 | davef
Metallization failure. A defect such as voids, cracks, separations, depressions, notches or tunnels or any combination in the cross sectional reduction that is a basis for rejection.
Electronics Forum | Thu Jan 15 09:04:36 EST 2004 | rkevin
Does anyone have any information about eliminating voids on BGA using SN62 as opposed to the normal Sn63, something which explains the inter-metallic layers which form during the soldering process and the leaching out of silver ?
Electronics Forum | Mon Dec 06 16:54:38 EST 2004 | Gopinath A
Hi, I understand that solder dipping of gold plated units (PCB or component lead) is not the ideal solderability test (leaching of gold in the solder bath being one reason). Would anyone have recommendations as to the ideal solderability tests for g
Electronics Forum | Wed Dec 15 10:37:55 EST 2004 | gopinath A
Thanks Dave, That answers my question. I didn't think either that the qty of gold in platings would be enough to contaminate the solder pot. I wanted to make sure that leach test is a valid test for gold finishes. Gopinath@mcl.com
Electronics Forum | Thu Feb 17 12:04:52 EST 2005 | Indy
Have you tried doing solder dip test on these components? Or a Leaching Test, to see if the solder catches on the termination ? I suggest you should try these tests.. Cheers Indy
Electronics Forum | Wed Nov 02 03:35:09 EST 2005 | Slaine
I thought it was the tin content that leached the copper so presumed 100Sn would be more aggressive?
Electronics Forum | Thu Dec 22 10:37:05 EST 2005 | mark
Pete is correct. Lead from the "Leaded" parts will leach into the solder pot and eventually the Pot will become contaminated with unacceptable levels of lead. At that point the entire pot will have to be emptied and cleaned. NOT a fun thing to do!!
Electronics Forum | Mon Feb 05 17:39:53 EST 2007 | flipit
Remember, deionized water is very corosive. If the water is too deionized, 10 mega ohm, it will leach the ions from exposed metals. I had a stencil cleaner where the welds completely dissolved. The stainless steel tank was fine but the welds were
Electronics Forum | Fri Nov 09 13:41:06 EST 2007 | stepheniii
Don't forget that leadfree solder can leach the iron out of old solder tanks. Make sure yours is compatable with leadfree solder. You don't want the tank disolving, unleashing a tidal wave of molten solder.
