Electronics Forum | Thu Jul 03 12:03:00 EDT 2003 | slthomas
So, there is a crack or gap between: * Solder and component termination. Bingo Correct? Describe: * Coarseness / smoothness of the metal on the termination underneither the crack. * Solder left on the termination. Unfortunately at 45X I can't rea
Electronics Forum | Thu Apr 09 06:28:11 EDT 2009 | qualityguy
We have different Solder mask 'gloss' and 'satin' the gloss has a surface energy =40 dynes. The test evidence to date is strong correlation between surface energy, mask type, HASS failure
Electronics Forum | Sun Apr 05 12:30:22 EDT 2009 | qualityguy
Forum: Has anyone experience conformal coat peeling after HASS and the failure mechanism being low surface energy attributed to the solder mask?
Electronics Forum | Wed Jun 23 13:34:29 EDT 2004 | df_indy
I am four weeks into my new job, there always seems to be some issues here with PCB every week. Today while I was checking some assemblies with micro-scope, I found a lot of tiny bubbles/blisters on the board. They are just little dots if you look
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 May 08 10:16:17 EDT 2003 | davef
Observations are: * Center most lead of the fuse on the top right of the assembly looks like it has excellent solder flow, but this is PTH. From the amount of solder, it must have been wave or hand soldered. * Center most lead of the fuse on the bot
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.
Electronics Forum | Thu Aug 18 13:11:39 EDT 2005 | jsloot
We have our board house apply a peel coat mask that can be brushed off after wave or reflow. You need to brush off while it's still warm.
Electronics Forum | Thu Jul 10 12:56:46 EDT 2014 | clydestrum
VERY interesting. Thanks, folks. I will look into this.
Electronics Forum | Sun Jun 29 07:31:03 EDT 2014 | vitrost
Hi, We had experienced very similar issue on boards of a certain PCB manufacturer. Field experiments showed that the solder mask of this manufacturer is prone to swelling and peeling after it was in contact with our water-based flux. When you switc
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