Hi! Yes, I made the assumption that Jon really meant Pd and not Pt as I haven't run into a NiPtAu surface finish on components yet. Dave "Stadem, Richard D." <[log in to unmask]> 08/24/2010 04:54 PM To TechNet E-Mail Forum <[log in to unmask]>, "[log in to unmask]" <[log in to unmask]>, "Roberts, Jon (SA-1)" <[log in to unmask]> cc Subject RE: [TN] SOLDERABLIITY ON NICKEL PLATIUM GOLD LEAD FINISH SMT PARTS Well, jeez, Dave. You beat me to it again. Except I was busy trying to find my references to soldering with platinum, not palladium. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of David D. Hillman Sent: Tuesday, August 24, 2010 4:13 PM To: [log in to unmask] Subject: Re: [TN] SOLDERABLIITY ON NICKEL PLATIUM GOLD LEAD FINISH SMT PARTS Hi Jon! There are a couple things to remember when dealing with NiPdAu surface finishes: 1) Pd diffuses very slowly into a tin/lead solder alloy. You may need to add a few seconds to your soldering process cycle time; 2) Adding an additional 5-10C of temperature will assist in the Pd diffusion into the tin/lead solder alloy. You may need to increase your soldering temperature depending on which soldering process you are using; 3) Some flux material are not compatible with Pd materials. You may want to try a different flux to see if you get an improved reaction; 4) Run a solderability test per IPC JSTD 002 to make sure you have an acceptable NiPdAu surface finish. When Texas Instruments first introduced the NiPdAu surface finish, we had to make slight time/temperature/flux adjustments on our typical soldering processes to obtain our expected soldering results. Good Luck. Dave Hillman Rockwell Collins [log in to unmask] "Roberts, Jon (SA-1)" <[log in to unmask]> Sent by: TechNet <[log in to unmask]> 08/24/2010 12:41 PM Please respond to TechNet E-Mail Forum <[log in to unmask]>; Please respond to "Roberts, Jon (SA-1)" <[log in to unmask]> To [log in to unmask] cc Subject [TN] SOLDERABLIITY ON NICKEL PLATIUM GOLD LEAD FINISH SMT PARTS Have any of you experience difficulty in producing an acceptable solder joint with Nickel platinum gold SMT lead finishes? We can rework at least twice to achieve an acceptable condition. Lead free part but we use a solder with lead. Any help is appreciated. Jon This communication is intended only for use by the addressee(s) named herein and may contain business confidential and/or legally privileged information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution, disclosure or copying of this e-mail and its contents is strictly prohibited. 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