Electronics Forum | Thu May 23 10:21:19 EDT 2019 | emeto
What is the material of this PCB?
Electronics Forum | Thu Oct 16 00:08:31 EDT 2003 | Dean
Why would you have troubles if and when you switch? Isn't that the point of materials evaluation? Understanding the impact and material capability BEFORE "betting the farm on it". I would never stake my career on a solder paste without an Engineer
Electronics Forum | Tue Oct 14 23:40:36 EDT 2003 | Dean
Here is a tip. Do an evaluation on materials. DO not trust what anyone says about solder paste. There are just too may "experts" out there peddling the brand of the week. You can begin with the brands listed, but do your homework. You know your
Electronics Forum | Thu Dec 06 16:45:11 EST 2018 | emeto
Sr. Tech it is not as simple as that. Viscosity of material is changing with temperature. So it is liquidus but it makes difference.
Electronics Forum | Mon Jul 01 04:39:49 EDT 2019 | sssamw
yes, You need tell us how the PCB and board designed, size, material, how de-paneling the PCB?
Electronics Forum | Mon Jun 10 05:05:33 EDT 2019 | pcbconnectchina
Hello! Don, I heard from SMT factory that the fixture for oven they use is durostone material, I don't if durostone is correct name translated, it is synthetic stone made of carbon fiber sheet. Best Regards Clare PCB Connect China
Electronics Forum | Fri Oct 17 14:33:05 EDT 2003 | AXL
Wait a minute I thought I said Celestica and a few others have done the Engineering evaluations on a list of 10 top solder paste's and Indium SMQ92J and Kester's R560&562 came out on top. First you say 'don't trust all of the so called experts on thi
Electronics Forum | Mon Jul 01 09:33:08 EDT 2019 | dbuschel
if you can't change the PCB materials or design at this point, you might be able to reduce it somewhat through the use of fixtures or edge stiffeners. Unless it is a particularly thick board, I don't think the reflow profile would be the issue. The t
Electronics Forum | Thu Sep 03 11:38:28 EDT 2009 | dyoungquist
I'd be more concerned with the pcb itself then I > would be with standard SMT components. Are you > using a PCB with a high Tg? (170 degrees C or > greater) The circuit board material is NP-170B (Nan Ya Plastics Corporation). It has a Tg of 170
Electronics Forum | Mon Oct 20 11:48:34 EDT 2003 | blnorman
Who said there was NO evaluation? The paste we chose was evaluated based on a 20 point test score as well as material compatibility. Once we introduced it to manufacturing each line had problems. For one manufacturing treated it as a drop in repla
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