... I believe medical are also exempt. As I understand it, there are two major factors here: 1) For the reasons you have outlined, the quality of the solder...
Tin has a habit of growing whiskers. It is also susceptable to dendritic growth. These are not the same thing! Tin whiskers grow perpendicular to the surface...
quick note... article said that whiskers were discovered w/ closely spaced components... bad design then whilst they're searching for small assys (I'd think...
Is it possible to solve this problem by dipping the completed unit is some sort of paint? I know that the military dips their electronics to protect them...
... May be possible I guess (although there might still be issues if the coating de-laminates), but the obvious downside is that by coating the board you...
There's a "gotcher" - at least in the European rules - for military/aerospace (and probably for medical too), the exemption only applies if the item is...
... There has been some discussion that the US FAA would not certify aircraft which had lead-free solder in the flight-critical systems to fly over the US. ......
... That is not the case, at least, not in the European legislation - the rules state that the concentration of lead in any homogeneous material used in the...
... It can be - you'd be advised to do HALT testing as there are differences versus SnPb with temperature changes and handling vibration. I think it's not...
Someone told me, and I don't know how true it is... To lower the Temperature needed to remove a component that has been soldered with Pb-free solder... Start...
... You can conformally coat or pot the boards. This adds cost, and makes diagnosing bad boards difficult and the repair of them even harder (and more...
Hi, The G100 cans came today and fit perfectly. The covers go out tomorrow cover artwork screening. They'll be back Monday and be assembled with the electronic...
Mariss, Congratulations. Very impressive little beasts. See it wasn't a hard project, only took 3+ years. Piece of cake. :-) Let the revolution(s) begin. ...
Mostly I'm breathing a huge sigh of relief; the sheetmetal fit! At $5.60/set and 500 sets, the hit would have been $2800 and 3 weeks. The 3 weeks would have...
Great Job Mariss, I can hardly wait to try one out. I dont suppose you can upload another picture with a CD in it. This will give us some context of size. Here...
... Right - the electronic components are NON-homogenous, therefore the lead must be held to "zero". I assume that means that if there is an instrument ...
... Oh, it works fine! The problem is that a manufacturer cannot do this, or the unit will now be forever contaminated by the lead. An end user can do this...
The size is 1.5" H, 6.75" L, 2.5" W, (38mm H, 171mm L, 63mm W) not counting the mounting ears. Panel mounting area (ears included) is 2.5" by 7.375" (38mm by...
Mariss, You can use this image until your screen printing comes back :) http://machsupport.com/Coppermine/albums/userpics/10001/grex.jpg ... From: Mariss...
... Wrong. The electronic components are made up of a number of homogeneous materials, each of which must be held at less than 0.1%. For example, the wire ends...
... (and ... Highly unlikely. Conformal coating will effectively block moisture from the board, and therefore protect against dendritic growth, but is unlikely...
... There is some evidence that, correctly processed (and this point is critical), Pb-free joints can be stronger and MORE reliable than SnPb soldered joints. ...
Hi Bene, Yes I understand that most things in the SMT world are grossly overpriced. Just look at a vacuum pick up tool. RS components want ~ $600.00 for one....
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