Electronics Forum | Tue Aug 26 12:52:04 EDT 2008 | circleprime
I have recently started to use RMA flux (customer requirement) for some of our projects. I am finding that some of my BGAs are slightly off. Not enough to be rejected but enough to cause concern. In the past I have been able to rely on the surface te
Electronics Forum | Thu Aug 05 19:10:53 EDT 2004 | celldude
wash->ssd top->wash->sticky flux bottom side->place smt components->reflow->wash->sticky flux top side->place topside smt components->reflow->wash) ssd is basically the process of applying solder paste to the pcb with a stencil and the solder reflowe
Electronics Forum | Thu Aug 24 10:25:49 EDT 2006 | wrongway
we use a stencil and aply paste to the BGA have used sticky flux but prefer pasting the BGA
Electronics Forum | Tue Jun 30 12:08:55 EDT 2009 | wrongway
sipad does work we used it on one assy it had a very fine pitch part on it and at that time our dek 260 wasn't up to the task along with our 8 mil stencils. we had no problems with it it was sticky enough to hold the parts on thur all smt machines.
Electronics Forum | Tue Sep 25 13:01:48 EDT 2001 | Hussman
If the flux you are applying by brush is alcohol based, use some alcohol on a few failed PCBs and retest. It souldn't take a lot of flux to reflow the balls to a pad that's already covered with solder and flux from the first BGA - unless you are cle
Electronics Forum | Mon Oct 08 23:17:48 EDT 2001 | Brad Arnold
We are trying to produce a PC Card bus assembly with a 672 pin BGA on one side. These pcb's are .015 thick. I believe the ball pitch is .5mm. The pcb's are plated with white tin. The pcb's are in a 1 X 3 array. We had 2 plates with appropriate cutout
Electronics Forum | Tue Aug 03 22:49:19 EDT 2004 | celldude
SSD can be used on both sides of the pcb. Although , it is not very logical to use it on the bottom side of a pcb that has numrerous Through-hole components, that are to be wave soldered. There are many advantages to SSD. The amount of solder is much
Electronics Forum | Sun Dec 11 08:13:27 EST 2005 | stepheniii
If you are taking off the old BGA then the board finish is not the same as it was orginally. I would want to clean the pads off as much as possible and then use sticky flux with the new BGA. But on the other hand, Aim solder has an article about smal
Electronics Forum | Tue Aug 22 15:37:22 EDT 2006 | russ
Sounds like a rosin flux. Is it sticky as well? Russ
Electronics Forum | Wed Nov 29 01:25:53 EST 2006 | callckq
Dear All, I have 1 product that using solder bar from vendor called Asahi. After wave process, we found quite a sticky flux residue remain on the board. Eventually, have huge impact on our ICT fisrt pass yield(FPY). Current FPY is a the range of
