greetings all I am having difficulty with successful production of heavy deposit gold [30-35 micro-inches] of wire-bondable soft gold, since Aurelon shut down their Ni-Au operation. My customer is currently bonding aluminum wire, but desires to go to gold wire. Problems have been: 1. Peeling nickel from copper [resolved] 2. Peeling gold from nickel [mostly resolved] 3. Spotting and discoloration [solved by better rinsing] 4. Texture on gold surface; following the pattern of the tarnish after soldermask and nomenclature oven curing [better after micro-etching before Ni-Au plating] 5. Entrapment of conductive chemistries/metals under the developed edges of Probimer LPI soldermask 6. Marginal peel strength 7. I don't know what is comming next! My process is: Panel plate Tent and etch [cupric chloride] LPI application, now Probimer 52 [but not for long] Nomenclature application, Hy-sol Cat-L-Ink [legend] Immersion/auto-catalytic gold, 30-35 micro-in. [applied by sub-contractor] NC rout Ship [and currently] Receive trash and rejections Can anyone advise me of good combinations of LPI soldermask and Ni-Au chemistries / processes. I don't plate, so I need a contract supplier of Ni-Au plating services, in the So-Cal area? . . . or in No-America as my second choice. Direct responses can be sent to : Russell Ruff at The Circuit Tree [NOT THE MAGAZINE!] 818-303-4648 email [log in to unmask] or to all here at the IPC TechNet forum. Thanks, Russell *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * *************************************************************************** *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************