Electronics Forum: solder mask in enig (Page 1 of 11)

solder mask peel off

Electronics Forum | Wed Dec 11 11:26:25 EST 2019 | SMTA-Norah

Yes, a polite complaint to our board shop later and the next batch didn't have that problem at least. I'm not convinced it's an ENIG issue as there was variability panel to panel in the first place.

Solder mask

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

Ammonia in Peelable solder mask compatability to lead free

Electronics Forum | Wed Jun 22 14:14:42 EDT 2005 | Steve

Tin/Lead we have had no problem in masking off areas on a pcb during wave soldering. Lead Free alloys, Nickel Silver Copper would there be any compatability issues with a Peelable latex solder mask containing Ammonia. Really hot need to know.

Ammonia in Peelable solder mask compatability to lead free

Electronics Forum | Wed Jun 22 15:03:12 EDT 2005 | patrickbruneel

The only thing ammonia can do is tarnish copper and make it more difficult to solder. And the higher temp in lead-free will discolor the latex (giving it a sticky surface), but the functionality of the mask will be intact. There should be greater co

Ammonia in Peelable solder mask compatability to lead free

Electronics Forum | Wed Jun 22 16:11:13 EDT 2005 | Steve

You know Pat, I should just call you directly rather than post this stuff. You always have an answer. You must have been around awhile huh? :)

Can we hide extra long pad with solder mask ?

Electronics Forum | Fri Nov 09 16:58:30 EST 2001 | davef

Go for it!!! You were unspecific, but adding mask to a completed board could cause: * Increased paste thickness, if you have double thickness of solder mask. * Wrinkled and lifted solder mask under the component, if the solderability protection of

Backward compatibility in LF solder pot

Electronics Forum | Fri Jul 22 07:36:18 EDT 2005 | Guest

It's the same like asking wether you get a gold-contaminated solder pot when soldering ENIG boards. As long as the replenishment of dross is large compared to the intake of contaminant, the contamination level will stay within acceptable levels.

Running with sn100c in my solder pot!

Electronics Forum | Fri Jun 09 11:55:34 EDT 2006 | jbrower

Howdy Amol, As far as I can see, there aren't too many pitfalls with SN100C. Just make sure to keep all of your alloys seperated. The issues that I am working out right now is the profiles with our wave pallets and some of our larger components. We

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Wed Sep 10 15:37:31 EDT 2008 | scottp

At the risk of painting with too broad a brush: QEs are like seagulls: fly in, make lots of noise, crap all over things, then fly away. Back to the knob turning vs. analysis debate. Part of it may be different industries. We're in the high reliab

defects in pcb manufacturing

Electronics Forum | Fri Oct 30 10:36:26 EDT 2009 | richie_puthotta

Hi, I see a huge solder mask shift on chip comp pads. This would result in mid-chip solder balls or solder beads. Overall, the solder mask workmanship is not acceptable. Mask is on pad.

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