Electronics Forum | Mon Feb 05 17:29:18 EST 2007 | flipit
I had problems with very simple timing circuits in the kilohertz range with leadfree NC solder pastes. Never saw the problem with lead NC solder paste. Run lead free no clean and clock was off. Run lead no clean and clock was right on.
Electronics Forum | Tue Jul 19 04:10:21 EDT 2005 | Rob
Hi, On a semi related front, part of our company is a distributor (I'm not going to say who, coz that would be sneaky advertising), and on all components shipped we've added the follwing to the label: ROHS Compliancy Status(Lead free & plastics etc
Electronics Forum | Tue Jul 19 06:07:30 EDT 2005 | GS
Yes Rob, I would like to know the type of metal finisching like JST097 or IPC-1066 or IEC .... suggest to do. I would like to avoid i.e. to get Bismuth finish on components terminals that I still have to solder with alloy containing Pb. Also to ha
Electronics Forum | Thu May 06 10:52:08 EDT 2004 | John S
Many component manufacturers are moving to Pb free terminations. I've been doing a literature study of Pb free processing and have found several articles that indicate Pb-free paste with Sn/Pb terminations leads to early fatigue failures. Does anyo
Electronics Forum | Wed Feb 01 07:32:05 EST 2006 | Chunks
Try an intermediate paste like Loctite/Henkle 218. It's design is to be used in a mixed lead/lead-free process.
Electronics Forum | Tue Jul 19 06:33:56 EDT 2005 | Rob
Hi GS, Thanks for responding - looks like we already put end termination coating on the label - we just call it "second level interconnect" There is a specimen label at: http://www.anglia.com/quality/labels.pdf Regarding standardising labels accr
Electronics Forum | Wed Dec 15 16:38:42 EST 2004 | patrickbruneel
Here's my 10 cents Studies done in the 1980's concluded that pure tin was prone to whisker generation. A tin content lower then 70% became exempt from this phenomenon. I have never seen or done any studies on the impact lead had in reducing the pote
Electronics Forum | Mon Jun 27 09:09:19 EDT 2005 | Bob R.
We've all been soldering Pb free parts for a couple decades. All your surface mount capacitors have probably had a Sn finish for years. Whenever one of our parts with a SnPb finish converts for Pb free we have the manufacturing site do a small buil
Electronics Forum | Fri Jul 08 09:40:28 EDT 2005 | Jason Fullerton
"The only real problem we're seeing is some suppliers trying to use bismuth. That's a big no-no in a SnPb process and we won't accept those parts." Yes and no. Since the SnPbBi tertiary alloy melts at 96 degC, any product rated for storage above tha
Electronics Forum | Mon Jun 27 14:20:57 EDT 2005 | Bob R.
If you visually inspect the solder joints of the first dozen or so boards with the Pb free parts and you're meeting workmanship standards then I wouldn't worry about it. When we started getting the first barrage of Pb free parts a couple years ago w
