Electronics Forum | Fri Dec 09 11:00:27 EST 2011 | alexanderb
Dear All, I am a totally new to the SMT process. In fact, I just had an overview course regarding the whole process of PCBA manufacturing and I have know a bunch of questions in my head. Most of them are linked to the solder paste printing process
Electronics Forum | Thu Jun 21 12:05:54 EDT 2001 | brownsj
I used to assembly 0402 devices on to a double sided PCBA using a 96% tin 4% silver alloy. This material printed fine but the higher processing temperatures did present a problem. This material had a melting point of 221 deg C which required a peak r
Electronics Forum | Sat Apr 26 20:27:18 EDT 2003 | LWEI
I'm working on a protobuild for a pcba. THis pcba uses double-reflow, paste-in-hole process. On bottom side there is a Ceramic BGA, size 35 X 35 mm, thickness 6mm, over 900 balls count (ball pitch 1mm)and it weighs a hefty 20 grams. Printing uses 6 m
Electronics Forum | Wed Dec 05 22:59:42 EST 2007 | er_pe
To be successful, and to yield quality products off any selective solder systems out there on the market today, DFX rules need to be enforced and followed. Lay-out is a one-shot process where as manufacturing of the PCBA is continuous. Obviously, muc
Electronics Forum | Fri Mar 22 10:33:58 EDT 2013 | mbrett73
Hello guys, I´m pretty new on pcba process and I´m writing to see if you can help me, we have combo process om pcb for UPS boards and we are facing a lot of shorts after wave the boards. We did few tests with different fluxes different profiles chan
Electronics Forum | Sun Jul 15 20:10:09 EDT 2001 | Danial
What is the best method to repair Warped PCBA. Obviuosly twisting it back to make it flat would be a disasterous. The method that I've tried wold be mounting the assembled board to the flat holder with the clamp and bake them at 120 Deg C for about 4
Electronics Forum | Sat Nov 11 11:27:51 EST 2006 | Tom
Hi, "glass wicking failure" we don't know what this is, but we suspect that the reflow process could very well be the root cause for some of our pcba with micro vias failure. Micro vias pcb we know to well (we don't like them at all). There are No p
Electronics Forum | Wed Jun 08 13:49:48 EDT 2011 | sonofptolemy
Hello, I am having a problem with HASL PCB's after it comes back from the stuffer. To me it looks like oxidation and it causes poor wetting. This leads to a bunch of problems all of which have different symptoms but the cause is this oxidation proble
Electronics Forum | Tue Dec 09 17:09:51 EST 1997 | Frank Silva
| We are doing a research on auto-inspection machine used for SMT component mounted PCBA. | If anyone would have more info., please give me some details. Mr. Szeto, my company is involved in manufacturing automatic x-ray inspection systems to provide
Electronics Forum | Sun Apr 21 09:52:07 EDT 2002 | pjc
Francis, The problem with shorter solder lands is you may have a problem getting good heal fillets. In the flash products I built the PCBA was inserted into a plastic shell and then we did an epoxy encapsulation using a Camalot machine. Toshiba, Sams
