Electronics Forum | Thu Jun 24 17:13:44 EDT 2004 | davef
Echoing SheanDalton's comments [above in this thread]: * A good way to strip part markings, solder mask, etc. * A fairly aggressive against most polymers. * A flammable material. * VOC issues in its use. * Assembly workers don't like the smell. * A
Electronics Forum | Mon Nov 12 19:37:38 EST 2001 | dennis
Thanks! dry erase does not come off easily with water. I have to use brush to remove marks. Thanks for your input anyway!
Electronics Forum | Thu May 27 14:44:05 EDT 1999 | Deon Nungaray
| One of our board fab houses is asking (again) to eliminate the reference designators and polarity markings from boards. This isn't feasible for thru-hole, but what is the industry trend on surface mount assemblies? | Deon Response: Hi Greg, Fr
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 Jan 30 20:07:56 EST 2008 | davef
Any ol' acrylic or urethane will work. It's possible to remove these conformal coatings. We've never removed coating from components to determine if the marking is still unlegible
Electronics Forum | Fri Mar 20 10:26:05 EDT 2015 | g2garyg2
For laser marking the mark quality is directly related to the PCB composition. If you want to guarantee a good mark every time and have control over the PCB being built (not always the case for contract Mfg) as the other responder stated, placing a w
Electronics Forum | Mon Mar 31 09:16:41 EDT 2008 | davef
What is changing the marking on the part? * Is flux residue coating the part to change the the way light reflects from the part surface? [Run a board with tape on the part, then remove the tape prior to AOI] * Is the heat of the oven changing the mar
Electronics Forum | Wed Jan 09 10:46:17 EST 2019 | rvines1
I've recently seen some TO-220 FETs that appear to be counterfeit parts that have had the marked area resurfaced and remarked with a false part number. I don't know much about semiconductor manufacturing, and I just want to know if there is a type o
Electronics Forum | Wed Jan 09 12:13:38 EST 2019 | robl
Yep, lots of ways to do it and lots of ways to check it. Immediately blacklist the supplier who sent them in to your business. Manufacturers don't need to do this. I've heard excuses such as remarked due to automotive qualification, but normally di
Electronics Forum | Tue Jun 13 19:58:33 EDT 2006 | davef
Team Services: Removing IC markings * methylene chloride to remove the markings * xylene and toulene will also remove some paints * "Black boxing" Simply use a tiny piece of sandpaper to "scratch the surface" and render the device blank. Chris: Sand
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