Electronics Forum: pb free and pb flux (Page 1 of 18)

flux compositions

Electronics Forum | Tue Aug 22 08:52:39 EDT 2000 | genesmelik

Good morning Dr. Lee. I was wondering how flux chemistries have changed, or will change, with the transiton to Pb-Free, given the higher reflow temperatures required for SMT assembly?

Mix Pb and Pb free alloy

Electronics Forum | Wed May 24 16:40:40 EDT 2006 | samir

Yikes! Sounds like a hairy situation there. I've successfully collapsed a Pb-Free BGA (using a Sn/Pb solder paste), with a peak temperature of 220 Deg. C and Time Above SAC's Eutetic point (217) of 17 seconds. Beware of overcooking your smaller ma

Re: flux compositions

Electronics Forum | Tue Aug 22 10:53:45 EDT 2000 | Dr. Ning-Cheng Lee

Excellent question. Alloy development is relatively easy compared to flux formulation. New fluxes for Pb-Free alloys need upgrades in 2 critical areas: 1) thermal stability 2) oxygen barrier efficiency Since the Pb-Free alloys require reflow proce

Mix Pb and Pb free alloy

Electronics Forum | Wed May 24 15:59:34 EDT 2006 | JohnM

I have a product with mixed in Pb free and Pb BGAs. I decide to use SnPb paste with Pb free reflow profile to make it work for both types of BGA. Do I have a reliability solder joint issue by using this method? How is your opinion on this case? Can

Mix Pb and Pb free alloy

Electronics Forum | Wed May 24 19:46:32 EDT 2006 | JohnM

So, it looks like the backward compatible of BGA statement is not guarantee for solder joint reliability. It doesn�t matter what temperature and what melting sequence we have in order to avoid the solder void issue. Is Pb diffused homogeneously thr

Mix Pb and Pb free alloy

Electronics Forum | Thu May 25 10:55:21 EDT 2006 | Chunks

Loctite makes a product called MP218 that works well with mixed alloys.

Working with Lead free and Pb Capacitors

Electronics Forum | Fri Jan 27 15:12:48 EST 2006 | GS

From technical point of view: it should not be a problem to mix Pb with Pb Free components soldered with a LF solder process. You have to take care about the max temperature allowed on your Pb components and make sure they can withstand the higher

Mix Pb and Pb free alloy

Electronics Forum | Wed May 24 16:19:58 EDT 2006 | inds

John, there have been quite a few discussion on Mixed Assemblies in this forum.. do a search.. you will get whole lot of information.. in addition - IF you are using Lead-free reflow profile...make sure the rated temp for Sn-Pb components is not vi

Working with Lead free and Pb Capacitors

Electronics Forum | Fri Jan 27 10:58:11 EST 2006 | mafc65

We are running our prduction (TV's)with Lead Free Solder, since 1 year ago, but we still have a lot of Electrolityc Capacitor (Thruhole and SMT)in stock that are for PB Solder. We have to use them before February-06. Do anybody know if there is a pro

Mix Pb and Pb free alloy

Electronics Forum | Wed May 24 16:47:21 EDT 2006 | patrickbruneel

Inds, It's about time that lead-free components can stand higher temps "myth" stops. The only difference is the plating, the component itself has not changed. Can you give us an update on this threat? If you�re the same inds http://www.smtnet.com//

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