Electronics Forum | Tue May 12 22:54:46 EDT 2009 | davef
Did the board fabricator forget to apply the nickel undercoat?
Electronics Forum | Mon May 18 08:34:08 EDT 2009 | davef
It's happened perviously. If that happens, there is a widespread solderabily issue, not just on selected pads.
Electronics Forum | Fri May 15 19:08:25 EDT 2009 | jlawson
Ammonia based masks can create solderability issues after they are removed. You can get non-ammonia based latex mask material but down side is slower cure and cost a little more as they have higher levels of latex etc
Electronics Forum | Tue May 12 06:44:16 EDT 2009 | jhk71
We do a conformal coating for a customer with copper-nickel-gold pads on his board. The pads are masked prior to coating with a standard gel, containing ammonia. After thousands of boards, being processed like this, now the gold pads seem to be less
Electronics Forum | Mon May 18 02:22:34 EDT 2009 | jhk71
Unfortunately I have no information about the metal layers and the processes. I only see the effect. Is it possible or common that the nickel undercoat could have been forgotten?
Electronics Forum | Wed Sep 09 17:24:49 EDT 2020 | kumar
For Conformal coating machine to mask the components which material(silicon or SS) make masking boots is beeter interms of Cost,cycle time,Reusable lifecycle
Electronics Forum | Wed Sep 09 17:36:15 EDT 2020 | waxler
I have used Kinnarney Rubber Co Inc, PO Box 37 450 Main St in the past.
Electronics Forum | Thu May 20 11:36:57 EDT 2010 | davef
Ansell ANS 11-100 HYFLEX (ESD) static dissipative coated Size||Ansell p/n||Techni-Tool p/n 7||ANS111007||328PR107 8||ANS111008||328PR108 9||ANS111009||328PR109 10||ANS1110010||328PR110
Electronics Forum | Tue May 25 07:19:13 EDT 2010 | jry74
I tried these and the operators didn't like them. The palm dip didn't slide well on tape and the finger tips were a bit bulky.
Electronics Forum | Wed May 19 19:41:12 EDT 2010 | jry74
Our employees use a knit style ESD glove when masking boards to prevent oils. They snag alot and bend leads and cause other problems. I have tried dipped palm but they are bulky and dont offer "feel". I tried a silky type but they had a huge seam
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