Electronics Forum | Wed Jun 16 09:46:02 EDT 2004 | blnorman
Have you considered spraying the coating? Check with the manufacturer of the epoxy to see if they recommend any equipment and whether or not the coating would have to be mixed with solvent to provide a smooth, thin even coat.
Electronics Forum | Sat Aug 07 11:10:03 EDT 1999 | JohnW
| Could someone give recommendation on the stencil opening for printing epoxy on HAL FR4 PCB for 0805 and 0603 size chips capacitors and resisitors. | My regular stencil manufacturer recommend the following: | Thickness: 8 mils | 0805 opening: Oblong
Electronics Forum | Mon Dec 21 14:38:11 EST 2009 | bandjwet
Does anyone know of a vendor of "black top" to fill in voids left by laser "X-out" patterns in the top of an epoxy (plastic) package ? We are demarking an area of a device and would like to fill it in with something other than a colored epoxy. Reg
Electronics Forum | Mon Mar 06 07:42:48 EST 2006 | davef
Epoxy inks tend to be more resistant to discoloration than the acrylics that are used more widely now. The acrylic-based inks vary in their ability to maintain color after heat cycles. The technical data sheets from the ink supplier should indicate:
Electronics Forum | Tue Mar 06 18:57:48 EST 2001 | pzohbon
I am looking at putting a laser or ink jet marking system for barcoding of pcb's in our smt production area. As and inline system it will need the capability to handle different size boards. We use dark green pcb's except for couple red and blues m
Electronics Forum | Mon Jan 14 23:02:52 EST 2008 | davef
You don't mention any particular IC or manufacturer or marking method. However, most IC marking is done with lasers these days. The laser actually alters the encapsulation so the only way to erase the marking is to remove the encapsulation. Otherwise
Electronics Forum | Wed Jul 18 08:44:20 EDT 2012 | leeg
We use the Edding pen as stated but then apply a quick set epoxy resin over the top and allow to dry, this does work.
Electronics Forum | Wed Jul 18 08:48:26 EDT 2012 | mccabekev
How are you applying the expoxy resin? Why use the expensive pen edding aerospace pen under the epoxy when a cheaper pen will do?
Electronics Forum | Thu Feb 11 09:12:46 EST 2010 | blnorman
Have you checked to make sure the mix ratio is correct? My experience with epoxies is that if the mix ratio is off with too much hardener you will get a much higher exotherm than expected. Modulus is high too, pretty stiff material.
Electronics Forum | Thu Jul 05 16:06:56 EDT 2007 | petep
What process / equipment have you found to best mark Revision levels / date codes and such onto small areas on PC Boards? I need a repeatable, economic solution that will endure processing temps and saponifier in the cleaners. Have used RoHS co
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