Electronics Forum | Mon Oct 03 19:15:32 EDT 2005 | cn
is this a single brd or multi up array? What is the thickness? where were the brds made, state/country? I had an issues with a brd which was fabed in mexico during the humid months there was mosture trapped in the brds which caused many strang things
Electronics Forum | Fri Sep 30 10:08:50 EDT 2005 | pete_d
What types of tests are performed to help evaluate solder integrity in the field over a length of time (say about 10 years)? I was thinking humidity tests, temperature cycling tests... but I don't even know what standards to test to. I want to tes
Electronics Forum | Mon Oct 03 16:19:22 EDT 2005 | Amol
for backward compatibility applications (such as this), the higher melting temperature alloy (LF alloy) gets the priority in selecting the reflow profile. you are using too low temps for reflow. your LF alloy wont reflow at these temp and you will e
Electronics Forum | Sat Oct 01 01:25:30 EDT 2005 | ck
Sorry theres a mistake on previous question. It should be lead free component termination but non lead free solder alloy Sn63/Pb37. The reflow profile i am using : Soaking temp. 120 to 160 deg C; time 90 to 120 sec. Peak temp. 215 to 225 deg C; time
Electronics Forum | Mon Oct 03 17:54:32 EDT 2005 | PWH
Yea, that seems pretty obvious to me as well but we have a customer that's not buying into running lead-free in conjunction with lead. They strongly believe that we need to install a dedicated lead-free SMT line inclusive of in-line wash system. Th
Electronics Forum | Mon Oct 03 14:14:06 EDT 2005 | Carmichael
My findings were that it wasn't accurate enough to create the crisp aperatures needed for release. That was almost ten years ago when everyone was looking for an alternative to chem-etch however. Water guided laser also showed promise of doing this b
Electronics Forum | Fri Oct 07 04:25:16 EDT 2005 | GS
Thanks everybody for your comments. I am not going to move to stencil waterjet cut. But because recently talk to people who want to move in that way, so that's why I am trying to get infos as much as it possible in order to learn what does it mean a
Electronics Forum | Mon Oct 03 17:57:36 EDT 2005 | Andrea
I am wondering if anyone can direct me to some resources that would help my team define some ispection criteria for silver epoxy. We are using the epoxy on joints as little as 0805. My team has differing opinions on how much is too little and how muc
Electronics Forum | Wed Oct 05 19:36:46 EDT 2005 | Ken
Let me re-phrese. I walk up to a rack of boards in the factory. How would I know if it's lead free or not? I send you (my customer) an order of boards. How do you tell if its lead free or not (visually).
Electronics Forum | Thu Oct 06 18:24:33 EDT 2005 | GS
To have symbol embedded in PCB copper it could be an opportunity for error because in case of mountinng on it a non ROHS compliance components/devices, the symbol would not tell the true. Better use the Rohs compliant label, stiked on PCB when sure
.gif)
winsouce.jpg)