Electronics Forum: solder joint inpect on mixed tecnology (Page 1 of 2)

Blow holes on radial parts solder joints

Electronics Forum | Thu Apr 05 12:45:45 EDT 2001 | Claude_Couture

On mixed technology PCBs, we find numerous blow holes on the solder joints of radial parts (electrolytics, LEDs, etc). The solution that works so far is to cut the leads very long in the radial inserter so that the part is kinda loose and the air in

Blow holes on radial parts solder joints

Electronics Forum | Fri Apr 06 16:19:12 EDT 2001 | davef

We build a mixed tech [eg, QFP, SMT fly shit, DIP] board where we can't clinch the DIP. So we set the clinch and cut on the DIP to just barely clinch, leaving the leads very perpendicular to the board. I wonder if you could do something similar wit

Is there any good articles to read on solder paste?

Electronics Forum | Wed Jun 05 15:22:48 EDT 2013 | davef

Solders, Fluxes and Pastes - A Lab Report This webcast consists of 10 individual program segments focused on the important topic of electronics solders, solder pastes and fluxes. Program Segments Include: * Can You Mix Leaded and Lead-free? * Probl

Testing effect of non-clean flux residue on solder joints

Electronics Forum | Fri Nov 03 15:43:20 EDT 2017 | dleeper

IPA and DI water are both very common and effective methods of cleaning PCBAs. http://www.zestron.com/sa/cleaning-applications/smt-electronic-cleaning/pcba-cleaning/aqueous-cleaning.html http://blog.gotopac.com/2010/11/18/ipa-as-a-universal-cleaner

Re: Solderability on Immersion Gold

Electronics Forum | Thu Mar 02 16:06:32 EST 2000 | eLDON sANDERS

Gentlemen, I too have been atacked by that "soldering to gold" and will add my 2 cents. I also had parts that would pop off the board when the fillet looked perfect. After lots of pain, experimentation, and sleepless nights, I solved it through a

Re: Solderability on Immersion Gold

Electronics Forum | Thu Mar 02 16:06:32 EST 2000 | eLDON sANDERS

Gentlemen, I too have been atacked by that "soldering to gold" and will add my 2 cents. I also had parts that would pop off the board when the fillet looked perfect. After lots of pain, experimentation, and sleepless nights, I solved it through a

Lead Free BGA's on non-RoHS Assembly

Electronics Forum | Mon Jan 29 10:11:12 EST 2007 | muse95

What does your customer want you to do? I would not want a CM soldering one of my boards with leadfree paste if I didn't ask him to. Whatever you do, get approval first. Two things to consider: If the other components are not rated for leadfree tem

Leadfree component plating on Sn/Pb paste

Electronics Forum | Tue Jul 08 18:53:21 EDT 2003 | MA/NY DDave

Hi The answer in general is no mixing of Lead Free with Sn/Pb solder. If you look at reliability data, failures after stress tests and then SEMs, failures occur at grain boundaries inside the joint. Lots more happens. By the way this mixing happe

Journals / Books on Selective Soldering Techniques

Electronics Forum | Wed Nov 23 17:50:40 EST 2005 | adlsmt

I am not aware of any such info so you may not get any replys on this but each of these systems is totally different. There is usually not much overlap of what is the right choice for an application. The solder bath machines with fixtures are for hig

Black pad defect on gold plated boards

Electronics Forum | Thu Aug 21 22:10:07 EDT 2003 | adlsmt

Well, for some reason the board house will pay for the boards but has some issue with paying for the parts on them. Why am I not supprised? Perhaps I have mis-diagnosed the problem. We have found two different board p/n's with the same type of defec

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