Electronics Forum | Fri Aug 22 10:01:52 EDT 2008 | robinj
I have seen this problem before. If the color is yellow usually it is caused by moisture left on the boards from poor drying after immersion silver. One of the ways to get rid of this is by dipping in acid cleaner solution. If the board supplier uses
Electronics Forum | Thu Aug 28 04:07:46 EDT 2008 | kelson
Hi robinj As you have mentioned, if the color is yellow usually it is caused by moisture left on the boards from poor drying after immersion silver. However, our boards were received from the supplier and the changes happened in our side. So, what di
Electronics Forum | Wed Sep 03 11:42:21 EDT 2008 | robinj
If the tarnish is really dark, it is very difficult to remove. Since it is yellowish it is only in the early stages. Replating will definitely work. I have used sulfuric acid based cleaners to remove this yellowish color. But rinse well and dry quick
Electronics Forum | Thu Sep 11 11:47:15 EDT 2008 | jeffcali
Depending on the assembly, I have applied balls on LGA's and reflowed them on using the rework hot air machine. Some places don't have the money to spend on mini micro stencils of all types, and thus spend the money on various sizes of solder balls
Electronics Forum | Tue Oct 14 10:33:27 EDT 2008 | martinouk
We use masking tape - cheap as chips although you do have to replace it after washing. I have in the past used BLACK TAK from loctite. It was extremely expensive, and was supposed to be permenant. But after two/three washers through the cleaner it ne
Electronics Forum | Tue Dec 02 18:10:39 EST 2008 | sys_steven
Need your opinion guys.. The old timers at the plant here feel that we should clean our board after Misprints withe the solvent cleaner over water wash. This is so they don't have to rebake the pcb for 24 hours before smt again. I don't believe th
Electronics Forum | Mon Feb 16 14:18:30 EST 2009 | jorge_quijano
1000 0402's, Micro BGA, QFP 0.4mm pitch, TSOP), we are trying to know what kind of equipment do you recommend to use in our factory, we already have Screen Printer, Chip shooters, Reflow oven, AOI, Stencil cleaner (manual), X ray, ICT... what else do
Electronics Forum | Mon Mar 02 10:23:46 EST 2009 | wrongway
You may need a glue despinser if you populate bottom side then wave. maybe a board deatacker at front of the line how about a multifunction pick and place machine so you can process all parts out there. we cleaned our stencils for years then we got a
Electronics Forum | Mon Apr 06 17:31:25 EDT 2009 | miguerre
Hi, We are currently in the process of selecting equipment and I was wondering if you had any comments on your experience with Manncorp. We are looking for Stencil Printers, Reflow Oven, Cleaner (SMT Aqueous Sys), and maybe others. Is this a good b
Electronics Forum | Mon May 11 19:14:17 EDT 2009 | binow
Is there any reason a dish washer would not work? Our volume for this is really low ~20 per month. Currently we use contact cleaner and a brush to clean the contacts on a few connectors. I was thinking about going the Ultrasonic route but wondered if
