Electronics Forum | Wed Dec 13 09:42:44 EST 2000 | jacqueline
Hi there, Could someone please tell me diferences and possible benefits that are found when using silver as a pcb finish as opposed to HASL. I've already tried the archives without much luck. ta much, jack
Electronics Forum | Thu Jul 27 07:50:35 EDT 2006 | davef
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Electronics Forum | Mon Jul 24 11:35:42 EDT 2006 | Jimk@ics-inc.org
We have experienced a problem with tin leaching or discoloration of lead terminals on random parts on solder side of a paste/paste operation. The profile has been used on previous production runs and there doesn't appear to be any heat damage to othe
Electronics Forum | Wed Dec 13 20:30:59 EST 2000 | Dave F
Immersion Silver PCB Surface Plating - Dennis VanBuren 14:21:24 02/01/2000 [Wudja mean "not much luck" searching the archives? What is this haggis???][Is that like saying "what is this chopped liver??"]
Electronics Forum | Thu Dec 14 10:14:04 EST 2000 | PeteB
Jacqueline, Asuming you mean immersion silver: Advantages - Very flat finish compared to HASL, more easily solderable than bare copper with OSP and more process tolerant than this in our experience, reasonable shelf life, cheaper than immersion gol
Electronics Forum | Wed Dec 13 10:24:52 EST 2000 | Wolfgang Busko
Hi Jack, I once tried this finish ( without changing any process parameters ) and encountered wetting problems even in the first reflow process. It was thought as cheaper alternative to Ni/Au we use for planarity reasons. Heard of the same problems
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 00:26:46 EDT 2002 | craigj
Are currently investigating a change of solder paste for various reasons and are considering a move from 63/37 to using 2% silver solder paste for increased long term reliabilty of solder joints with gold finish PCBs and to further reduce reflow temp
Electronics Forum | Fri Dec 15 08:00:57 EST 2000 | Pete B
John, We regularly wave solder electroless silver finished boards (Alpha Level)with mixed SMD and through hole parts and do not have any problems. We have changed a number on PCB's from HASL to electroless silver, mainly for the benefits at SMD whe
Electronics Forum | Tue Apr 09 08:25:55 EDT 2002 | davef
Search the fine SMTnet Archives.
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