Electronics Forum | Wed Dec 10 21:40:06 EST 2008 | davef
So, this fine designer thinks the cost of you putzing around with is thing is cheaper to the comapny? No. The fine designer is measured on in-bound cost, but not on the impact on overhead of those in-bound costs. OK, try this one: Have your fabric
Electronics Forum | Mon Feb 02 11:52:07 EST 2009 | pjc
Is anybody using H2O washable solder mask that comes on the PWBs you get from the fab vendor? I am researching PWB vendors that can provide this service. Thanks.
Electronics Forum | Mon Feb 02 18:05:20 EST 2009 | stepheniii
What flux are you using? We use a low-solids No-Clean water-based flux. Maybe some of what you are seeing is not residue from the flux but is from reaction with the solder mask.
Electronics Forum | Wed Feb 18 12:21:42 EST 2009 | glynnhamer
HI again Dave, I was wondering what kind of problems you were experiencing with the silicone tape that led you believe that it wasn't the correct tape and question the manufacturer? Were there more failures and solder issues ? Thanks
Electronics Forum | Wed Feb 18 20:15:30 EST 2009 | davef
Glynn We allow no silicone in our shop, because it ruins solderability. For more look here: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=47025
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 Apr 08 07:49:25 EDT 2009 | davef
We don't view this as "board delamination." It looks more like "solder mask bubbling." It may be the picture. Please describe the issue or enclude additional pictures.
Electronics Forum | Wed Apr 08 08:21:48 EDT 2009 | 1036
push the "bubling" and it springs back. It does not look like solder mask. We may have to fight with board house as they don't think it's their problem. Do you know any way to find the real reason? Any idea or help will be appreciated.
Electronics Forum | Thu Apr 16 11:58:20 EDT 2009 | ccross
We have seen this exact same problem. Our vendor agreed it was their problem and also agreed it was a moisture issue within the PCB layers, not the solder mask. We have taken to baking our boards, especially when they are manufactured during the late
Electronics Forum | Sat May 02 23:31:06 EDT 2009 | kareal
Thanks davef. The defect always occurred during UHAST reliability, but not find in reflow. The key is that there is tin diffuse to copper trace under solder mask. is it a "normal" board defect and what is the potential risk for device? thanks!
