Electronics Forum | Wed May 19 19:46:41 EDT 2010 | jry74
I am experiencing sporatic de-wettting issues, so I have been thinking about ways to clean fully assembled circuit boards that have open switches, contacts, etc. I also suspect that that plastic bodied components have residual silicone mold release
Electronics Forum | Thu May 20 08:51:29 EDT 2010 | jry74
A lot of our dewetting is happening on plastic body components, such as ICs. When they are manufactured, the molding process requires a mold release to make the part release after molding. Usually, the release agent is silicon based, but you can't
Electronics Forum | Thu May 20 14:32:06 EDT 2010 | davef
First, what's wrong with some dewetting of conformal coating on component bodies? Second, there are chemistries that might be able to remove silicone mold release, but cleaning the chemistry is not easy without affecting the whole board, as you impl
Electronics Forum | Thu May 20 07:52:36 EDT 2010 | rgduval
In general, cleaning with deionized water is acceptable for most component. Open switches and contacts, in general, do not get damaged in this process. A good drying is required, of course, after washing. However, you've described dewetting issues
Electronics Forum | Tue Dec 07 13:40:25 EST 1999 | Tim
The company I represent provides electronic manufacturing services. Some of my customers ask that we ship their boards "un-tested". By un-tested I mean we build them, visually inspect them and out they go. I find that on un-tested boards, it's not
Electronics Forum | Wed Dec 08 18:12:57 EST 1999 | Dave F
Well said Sotty!!!
Electronics Forum | Tue Dec 07 14:21:41 EST 1999 | Brian W.
In my experience, the most commonly accepted theory is that 100% inspection is only 80% effective AT BEST. That means that if your inspoectors are happy, noy outside concerns, well-rested, etc, they will catch 80% of the defects. This number goes d
Electronics Forum | Wed Dec 08 02:07:25 EST 1999 | Scott Cook
Tim, What Brian writes is all true. However, let em put it into a sales / marketing perspective..... The REAL issue in your situation is: Who is responsible for the failures which WILL result in shipping untested product? Typically, your customer
Electronics Forum | Sat Sep 15 03:31:05 EDT 2018 | colinbenton
My second assembly order on ALLPCB.com is ready to finish soon. I need to provide HS CODE for the custom clearance process this time due to the large amount. Anyone knows the code for this ? At present, I know the ones for 1-2 layer should be 8534009
Electronics Forum | Fri Jan 08 10:11:15 EST 1999 | Tim
This is a question for those of you who actually assemble components onto a board. Any idea what the "industry standard" is for fall out on assembled PCB's? I realize that the controls put in place in your processes will effect your overall quality
.gif)
