Electronics Forum | Fri Apr 26 12:35:05 EDT 2002 | blnorman
Sounds like the mask wasn't properly cured. What kind of solder mask is it? We use a photoimageable mask on our boards. The secondary cure is ~ 90 minutes @ 150�C. One of the cured mask tests is solder bath resistance where it has to resist degra
Electronics Forum | Tue May 21 13:43:17 EDT 2002 | dougt
With regards to feeders handling 0201's, how does this feeder (as well as other manufacturers feeders) keep the pick position accurate? The feeders I've used have some play between the tape and the sprocket, enough so that if I tug at the cover tape
Electronics Forum | Mon Apr 29 02:50:03 EDT 2002 | Bob Willis
The basic guidline is lead size plus 0.010" which you can also use for through hole reflow/intrusive reflow. Most suppliers of the insertion equipment quote this as the minimum clearance hence its a good guide. Druing recent trials for through hole
Electronics Forum | Wed May 15 10:55:35 EDT 2002 | geoff_goring
As I thought..... This is probably why most journals and standards I have studied hold shy of even attempting to predict shelf life. They certainly hold off of any predictions when based on accelerated life testing too. The component lead is a cop
Electronics Forum | Thu May 02 11:34:39 EDT 2002 | Yannick
Hi, You can go to http:\\www.circuitree.com they had a supplement with the april issue of the magazine with a very good article on 4 board finish, if you are able to find it on the web site you will find all your anwser and more :)The article name
Electronics Forum | Fri May 10 10:36:09 EDT 2002 | stownsend
Could be. Bottom line is my frustration is high with ENIG. It has it's merits, but if it's not done right, it'll bite you in the butt. Too many other choices to keep this frustration around. I have never used OSP. I'm requesting 200 boards from my b
Electronics Forum | Mon May 06 08:25:35 EDT 2002 | ianchan
check http://www.metcal.com inquiry the metcal team on the APR5000. no package is too much fuss nor mess with this system that rocks the house, and comes it with a price tag affordable to most companies. the only -ve limitation this system may ha
Electronics Forum | Tue May 07 07:29:24 EDT 2002 | Yannick
Hi, I reaaly mean AG (Like silver) we was thinking about going with immersion gold butis a bit more expensive. we use a no-clean paste but in a few year( maybe 1-2) we suppose to change to a lead free. You said that with Immersion gold we
Electronics Forum | Tue May 07 07:38:13 EDT 2002 | ianchan
Hi mate, checked with one of our egg-brains in the factory (freakin' workaholic still around at this time of night), he tells me that Ag-based PCB finishings share rather similar reflow temperatures for normal Sn/Pb applications. this means (if he i
Electronics Forum | Fri May 10 12:00:41 EDT 2002 | genny
It seems like the biggest problem with silver is its availability. With only a small number of companies offering it, that affects lead time and price. However, everyone I've heard using it seems to think it is excellent. No one seems to have a go
