Electronics Forum | Thu Jan 22 08:51:07 EST 2009 | mefloump
We use green painters masking tape. Comes off easy and doesn't leave a residue. The blue colored masking tape works well also but tears too easily. Ours runs through and IR oven to cure the coating after it runs in our PVA650 and we have not seen and
Electronics Forum | Wed Nov 09 10:21:30 EST 2005 | Amol
i am going to try it to use with Electrolube HPA. BTW we ran into a similar ptoblem, we just put pink mask on it to seal it off. still takes less time than to mask them with tape
Electronics Forum | Thu Jun 06 09:28:24 EDT 2002 | Hussman69
Sure do, it's from the paste that gets squeezed under your R's and C's. This paste is now on your mask and during reflow, wants to move off the mask. Unfortunatly, it follows the flux residue to the side of your component. An easy fix is to use th
Electronics Forum | Thu Jul 10 15:00:58 EDT 2003 | russ
Louis, For whatever it is worth, When I have $5000 parts I don't even mess around with a rework station. I would mask off any heat sensitive components (We use water soluble masking like that for wave soldering) and then process through the oven yo
Electronics Forum | Thu Aug 01 11:43:57 EDT 2019 | slthomas
I noticed that your solder mask registration is off some. Does it cover a significant portion of any of the pads for these parts? If so, is it possible that the surface tension of the solder at liquidus is enough to skew the part when the solder i
Electronics Forum | Sun Feb 11 08:44:47 EST 2007 | jerry
No, 50 parts on one side and 4 SOIC leds on the other. The LEDs cannot go through the wave so I need to mask them off or cover them up to protect them during the wave.
Electronics Forum | Tue Sep 06 09:47:12 EDT 2011 | dyoungquist
We use a 40mil circle with the solder mask backed off another 40 mils (120mil circle) beyond that. Works good for us but not sure if that is an industry standard or not.
Electronics Forum | Thu Mar 08 14:30:45 EST 2007 | ratsalad
If you are in the middle of a run and can't get a replacement stencil there immediately, you can always put a little kapton tape on the bottom of the stencil to mask off a portion of the DPAK pad and reduce the paste deposit. We have had to do this
Electronics Forum | Wed May 20 09:52:50 EDT 2009 | dwelch123
Use a push/pull tester. I use an OBA inst. works Ltd. tester. Just because mask comes off with bonder doesn't mean bonder is strong or cured right. Mask can be weak in between pads do to area size. Do it right and you'll know for sure. To many people
Electronics Forum | Thu May 01 13:56:45 EDT 2003 | kmorris
Dave: After the stencil was made with apertures for a connector on this PCB, it was discovered that the connector would have to be handsoldered after SMT reflow. If the solder deposits are left to reflow on the pads, it makes it difficult for the o
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