Electronics Forum | Thu Apr 03 15:17:35 EDT 2008 | lakeside
Hi John, Check out Sierra Proto Express: http://www.protoexpress.com They have a microelectronics division that can do the 4 mil laser drill & they can get down to 1.25 mil space/trace. Hope they can help! Julie
Electronics Forum | Tue Apr 29 02:08:21 EDT 2008 | sin4d
Hi, I am also facing the same probelm. I assembly a substrate with a thickness of 0.30mm and the board warp after reflow. If I bake the substrate at 125 Deg C for 2 hours will it help to solve this problem? Thanks
Electronics Forum | Tue Aug 26 09:30:44 EDT 2008 | pcbbuilders
i acutally meant to bake components that are moisture sensitive before placing them. i just want to use a toaster (not the pop up kind), maybe the best way is to just get an oven thermomoter and see where the 125c setting would be on the toaster.
Electronics Forum | Fri Aug 29 02:47:31 EDT 2008 | omid_juve
i read in smt soldering handbook that by placing the device in a 125`c within 48 hours the moisture will be removed what do you think about this method ?
Electronics Forum | Tue Apr 20 11:25:59 EDT 2010 | cunningham
Has anyone got any of these ovens or know of any issues with these? We are on the market for a 10 or 12 zone oven and the BTU above is looking like the favourite Any info would be great
Electronics Forum | Wed Nov 10 10:41:57 EST 2010 | esoderberg
subject board fabrication calls for .05 -.125um of gold over 2 - 5 um of nickel. When doing double sided reflow using same profile, parts of the gold are tarnishing and causing test pad failures. any ideas as to the cause?
Electronics Forum | Tue Apr 05 11:59:41 EDT 2011 | grahamcooper22
maybe the pcbs need a proper dry (the quick dry in the reflow oven won't get all the moisture out )...maybe 125 C for 4 hours or speak to the manufacturer to get their recommendations.
Electronics Forum | Mon Aug 29 12:45:01 EDT 2011 | scottp
Now with lead free in the automotive world we include 1206 chips for the same reason. A ceramic 2512 only lasts a few hundred cycles of -40/+125C with lead free solder. A plastic bodied 2512 can go several thousand.
Electronics Forum | Thu Jan 12 15:36:59 EST 2012 | swag
I've got specialized tooling I'm building for SMT processing. It requires a 0.125" thick sheet of high temp. silicon rubber cut to shape. Does anyone know of someone who can cut silicon sheets to a specific pattern/design?
Electronics Forum | Fri Jan 27 07:30:54 EST 2012 | scottp
We're in the high rel market and use a lot of 5 mil stencils. They give plenty of paste to meet IPC class 3 and survive over 1000 cycles of -40/+125C thermal cycle testing.
