Electronics Forum | Wed May 23 15:58:01 EDT 2018 | mcurtin2011
Those patterns are either: a) the stencil has recieved some streching stress - either being pushed on and dented by some obstruction, or b) has been worn thin and therefore streched as a result. This type of change to your foil may cause a slight sh
Electronics Forum | Mon Jan 31 14:21:26 EST 2005 | Chunks
Not to put Heraeus down - but we experienced the same thing from time to time. We finally found out it was the humidity in building. The higher humidity would cause the bleed out of this adhesive. We switched to Loctite and the problem went away.
Electronics Forum | Mon Feb 12 15:57:25 EST 2007 | pr
Anybody out there using this with lead free paste and willing to share the good and bad? I used them a few years back and had some issues (wasted paste, paste bleeding out around the skids). Just curious if DEK has addressed those problems and how cu
Electronics Forum | Tue Aug 17 10:41:13 EDT 1999 | Steve A
Wayne, Sounds like a gasketing problem. When the horizontal apertures are bleeding but not the vertical apertures. Could be poor underside support, HASL miniscus issues, masking or plugging issues, but what many people do not account for is that t
Electronics Forum | Mon Aug 14 13:08:00 EDT 2023 | dimamalin
Similar issues arose for me in cases where the contact pads of components were located below the solder mask level. Ordering a thinner stencil might potentially solve the problem.
Electronics Forum | Fri Aug 18 09:19:01 EDT 2000 | PR
We have been using the Pro Flo for about a year and the print quality alone is worth making the move. It is flexible in that switching over to blades is pretty simple (if you need to), and the operators love it because clean up is a breeze. The only
Electronics Forum | Tue Feb 16 08:54:57 EST 1999 | Ross Berntson
| I am fairly new to the SMT game and I am getting conflicting answers to the following. Maybe someone can help me! When printing, one person is telling me that the stencil should be wiped completely clean of all paste because the quality of the
Electronics Forum | Thu Aug 30 11:59:00 EDT 2001 | Spanky
Hey all, I have 3 questions about reflow. Hopefully someone can help me. 1. I am having a problem. I set the peak at 230 and my mole thermocouples are telling me the temp in that zone gets to 237. How is this possible even if the thermocouple
Electronics Forum | Fri Jun 02 09:31:26 EDT 2000 | C.K.
Okay, there's a debate here at my company. We build a card here that, often times, we get batches where there is excess HASL in the VIA hole barrels. Here is the problem that this causes: During the "1st reflow", the excess HASL bleeds out of the
Electronics Forum | Fri Sep 19 15:52:18 EDT 2008 | davef
This is not something that we'd expect to see on NiPdAu finished leads. Help us understand the extent of the problem better. From your picture, it looks like a band of copper color with black on the outer portions of the copper color that bleeds int
