Electronics Forum | Tue Aug 27 05:02:13 EDT 2013 | danyquintard
I think it is useful just to see where varnish should not be (eg connection parts). it is necessary to use another method to measure the thickness.
Electronics Forum | Wed Dec 01 15:53:59 EST 2004 | davef
uV light inspection indicates the "completeness" of coverage, but provides no measurement of coating thickness.
Electronics Forum | Mon Jul 20 15:53:10 EDT 2020 | robl
Tape test to check adhesion and multiple point thickness test - each board has 5 points per side documented for thickness testing & we measure pre & post coating thickness with an electronic meter. Also temp & humidty are also logged, and alarms go o
Electronics Forum | Fri Sep 18 09:18:06 EDT 2009 | ysutariya
Also, it wouldn't hurt to perform SERA testing to determine the amount of free tin to begin with. From what I remember, I think you need 30 microinches of free tin to ensure success. XRF won't give you an accurate thickness reading as it counts the
Electronics Forum | Tue Jun 05 21:14:10 EDT 2001 | davef
You aren't going to post our stuff on your "Hey, I'm the wizard site", are you? Board fab, Pad coatings, OSP 1 OSPs: Imidazole (Via Systems) is good. Entek (Enthone) works, but requires strict thickness control in fab. 2 Enthone CU56 allows one t
Electronics Forum | Tue Sep 09 11:53:36 EDT 2008 | davef
We consider "IR-reflow soldering profile" to be the supplier's recommended reflow thermal profile that a component temination 'sees' for proper soldering, regardless of the method used to reach that temperature. When you say, "We have a lot of defec
Electronics Forum | Tue Feb 03 13:39:08 EST 2009 | grics
Good morning Jamie. I work at a CM and can offer some input on process flexability. I do not have any data on how reliable the coating is but I can say that they are both very difficult to control. Will you be selective coating or full coating? Ho
Electronics Forum | Tue Sep 28 04:16:18 EDT 1999 | Brian
| | | | | Jackie's posting recently and responses to it got me to dondering. First, recollecting, we bought an IR rework station a couple million years ago. It had a IR source on a stand, a bunch of lenses, and Reynolds aluminum foil for shielding
Electronics Forum | Wed Nov 21 12:29:52 EST 2001 | mparker
Now that we know where you've been and what you wish to accomplish next, I can still give you some suggestions. 1. Get IPC-7912. Use it to evaluate your CM's. Especially if you have multiple contractors supplying like products. You will quickly see
Electronics Forum | Sat Aug 07 11:33:55 EDT 1999 | JohnW
| | What oven temperature should be used to reflow solder (Sn63Pb37) on a PC board (0.075" to 0.100" thickness) in 5 to 10 minutes? | | Profiling - tedious but important. As said, start with the paste manufacturers recomendation which is usually pu
