Electronics Forum | Tue Jan 13 10:35:06 EST 2009 | evtimov
konrad, why did you change your mind now? Now you can agree with PCB manifacturerers? I didn;t hear anything in their defense and you gave up. If colour is not the same each time, that means they don't have standarts or knowledge to control it, an
Electronics Forum | Fri Jan 02 16:52:16 EST 2009 | boardhouse
Hi, From a Manufactures choice - Green is the best due to it is the most commonly used mask color in the industry & cheapest. Kind a like Red paint for Barns. For US shops, most only have one LPI machine and to continually switch from Green to othe
Electronics Forum | Sat Jan 23 16:07:20 EST 1999 | Steve Gregory
| hi, | i am working towards developing a no-clean process for a customer at contract manufacturing facility. the assemblies have gold fingers on them. these are masked to prevent from any damage to them during reflow soldering. the earlier proces
Electronics Forum | Sat Aug 14 17:39:37 EDT 1999 | Gerry S.
One of the DFM suggestions I've seen is to remove the solder mask web, i.e. the mask between pads on 20-mil QFP devices. The rational is that if the mask is thicker than the pad the mask can prevent the stencil from making intimate contact with the
Electronics Forum | Wed Oct 13 18:37:32 EDT 1999 | Brian W.
There is a company in Florida that was using water soluble solder mask with their wash system. The gentleman to call there is Lynn Hurt, their Sr. Staff Engineer. Switchboard number is 352-799-6520. Brian
Electronics Forum | Fri Feb 19 14:43:46 EST 1999 | Nithy
We are in the process of getting into no-clean paste and fluxes. One important issue in this is sodler balling. I have heard some people say that having a matte finish would help in having lesser solder balls and that the solder balls would not be
Electronics Forum | Wed Oct 13 14:27:08 EDT 1999 | mikeh
Dave F, We are currently using a latex based ambient/thermal cure material that is applied by hand or automated dispensing equipment. Printing is an option for us, but we have not had much luck with this particular material. The mask is peeled off a
Electronics Forum | Thu Oct 14 06:00:49 EDT 1999 | Graham Naisbitt
The latex should not influence your closed-loop filtration - unless of course it falls off during cleaning. The issue would be with water soluble materials. As Dave (hi Dave) said, the clay based version of these will clog/blind/knacker your carbon
Electronics Forum | Thu Oct 14 23:19:25 EDT 1999 | Dennis O'Donnell
Water soluble masks are great in my book. After having used the latex type, I found that the water soluble will save a lot of time. I dont't use a closed loop system, but I do have a filter on my discharge line. I have not experienced any filter c
Electronics Forum | Wed Oct 13 12:54:44 EDT 1999 | Dave F
Mikeh: You can't let that stuff get to your carbon bed. Literally, you can watch your bed die. The clay coats the carbon, entombing it. I've heard talk of using a RO filter as a front-end buffer to the recycling system, but know of no one who has
