ICEE -------------------------------------------------- From: "Bev Christian" <[log in to unmask]> Sent: den 25 August 2010 18:03 To: <[log in to unmask]> Subject: Re: [TN] SOLDERABLIITY ON NICKEL PLATIUM GOLD LEAD FINISH SMT PARTS > Inge, > They are not mixed. They are sequential layers. > Bev > RIM > > ----- Original Message ----- > From: Inge [mailto:[log in to unmask]] > Sent: Wednesday, August 25, 2010 12:01 PM > To: [log in to unmask] <[log in to unmask]> > Subject: Re: [TN] SOLDERABLIITY ON NICKEL PLATIUM GOLD LEAD FINISH SMT > PARTS > > Dave, > > What's the idea with mixing Nickel and Palladium on component leads? In > general, Pd is used as a substitute for Rhodium in order to increase the > wear resistance for e.g. sliding contacts. I have also seen that mixing > Ni > an Pd causes an increase of the internal stress, rather much, depending > on > the wt%. What pays for the extra process in this case? > /Inge > > > > -------------------------------------------------- > From: "David D. Hillman" <[log in to unmask]> > Sent: den 25 August 2010 00:21 > To: <[log in to unmask]> > Subject: Re: [TN] SOLDERABLIITY ON NICKEL PLATIUM GOLD LEAD FINISH SMT > PARTS > >> 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. If you >> have received this e-mail in error, kindly notify the sender by replying >> to this message. In addition, please permanently delete the message and >> any attachments without copying or disclosing the contents. 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