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 09 08:25:55 EDT 2002 | davef
Search the fine SMTnet Archives.
Electronics Forum | Fri Aug 30 16:25:21 EDT 2002 | davef
Imm silver holds-up to multiple thermal cycles very well. The things, we guess, are happening to make imm silver tough to solder after heating and sitting are: * Oxidation of the silver. * Reduction of the co-deposited organic anti-tarnish [used in
Electronics Forum | Thu Aug 29 20:02:58 EDT 2002 | davef
Often assemblers leave areas unsoldered for future component additions, modifications, and test points. On imm silver boards, these unsoldered areas become a real bear to solder/test later in life. One way to avoid that problem is deposit some solder
Electronics Forum | Fri Aug 30 04:44:31 EDT 2002 | jason
Hi Dave, Why does it become " a bear" if u leave it unsoldered ?? Does it oxidise or something ?? Question (1): Does Ag imm. PCB need to use Solder paste with AG ?? If yes, why. Question (2): Does Ag imm pcb have poorer surface finishes than HAS
Electronics Forum | Thu Oct 18 11:20:52 EDT 2001 | furrer
1. Does anyone has seen results for the reliability of Solder Paste containing less than 1% Silver. (It is in use for soldering 0402 components because of Tombstones. 2. Is it common to use eutectic Solder Paste SnPb, without any silver, for regular
Electronics Forum | Fri Jan 24 11:05:38 EST 2003 | johnw
I fyour just using Sn/Pb in your paste even using nitrogen will lave you with slightly grainy joints. The silver from your PCB will disolve into the Sn/Pb at 'uncontrolled' rate what I mean is depending on the temperature and time above liquidous the
Electronics Forum | Thu Oct 18 18:39:15 EDT 2001 | davef
Responding to your questions ... RELIABILITY OF 1% SILVER SOLDER PASTE: It�s as good as the next solder paste, all other things the same. Look at your back articles by Jennie Hang in SMT magazine. I want to say she wrote an article on the topic i
Electronics Forum | Thu Aug 12 20:32:44 EDT 2004 | usdigital
Indy, We use Palladium silver surface finish parts for silver epoxy attached parts only. It is our understanding that this finish is not for solder, but only silver epoxy attach. I expect that is you problem. Dave
Electronics Forum | Wed Apr 07 08:28:41 EDT 2004 | Dougie
Hi, We are Scottish manufacturing company considering a move to Immersion Silver finished PWB's from HASL. The driver behind it being the RoHS and WEEE legislation in Europe at present. My question is... We plan on using a Sn/Cu/Ni solder bar in o
