Electronics Forum | Fri Nov 20 12:39:31 EST 2009 | sforman1
Is it possible to use Reactive Nano Technologies solder process?
Electronics Forum | Tue Feb 27 22:40:28 EST 2007 | davef
IPC-A-600G, 2.9 Solder Resist [Solder Mask] [snip]"Solder resists are used to limit and control the application of solder to selected areas of the printed circuit board during assembly soldering operations and are sometimes used to reduce dendritic f
Electronics Forum | Tue Feb 27 20:17:19 EST 2007 | roderickray
I have been trying to tell people at work that minor scratches on solder resist on BGA will not effect functionality of BGA, instead they want to attempt repair of these scratches. Any suggestions.
Electronics Forum | Wed Feb 28 07:40:26 EST 2007 | realchunks
Hi Roderick, Guess it depends on how you define "minor". If it is just a visual blemish in the mask, there will be no affect o the BGA. If it is through the resist there may be a chance of solder shorting, which will affect it, I doubt it but poss
Electronics Forum | Fri Dec 12 10:28:30 EST 1997 | David Syracuse
I am interested in locating a water soluble resist mask that does not leave a residue after wash and is easy to work with during the screen printing process. I have tried the Alpha Metals 110 and 220 solder mask and have found that it does not leave
Electronics Forum | Fri Jan 09 08:20:43 EST 2009 | caerleon
Does anyone have design knowledge of why some manufacturers remove solder resist from the area around pads on fine pitch devices? What purpose does it serve? I only know that it would be better for AOI as you would not have light being reflected fro
Electronics Forum | Fri Jan 09 09:43:48 EST 2009 | boardhouse
Hi Simon, The main reason that it would probably be removed would be do to lack of clearance for a soldermask dam from pad to pad. typically if the clearance from pad to pad is under .008 the solder mask dam would be removed. Min recomended dam siz
Electronics Forum | Tue Sep 21 11:01:59 EDT 2004 | pabloquintana
Cleaning method will depend on the type of flux > that you use in your soldering process. Yes it is isopropyl alcohol. We use "no-clean" halide free flux (Multicore X33-06i). We still cleaning and I beleive it is because we roto trim the leads aft
Electronics Forum | Mon Sep 20 19:46:16 EDT 2004 | pabloquintana
We use Envibar UV 1244 to coat our PCBs after wave soldering. We clean them with alcohol, and then we coate them manually with a brush. Then they are passed through a UV Oven. We have adhesion problems, and we started by looking at the Envibar, but
Electronics Forum | Tue Sep 21 10:53:53 EDT 2004 | davef
We know nothing about Envivar UV 1244 and you weren't real clear about the details of the problem or the materials [eg, ws flux, solder mask, etc], but we'd speculate your adhesion problem goes back to the cleanliness of your board. First by 'alcoho
