Electronics Forum | Thu Sep 09 10:50:59 EDT 2004 | agkettle
Does anyone have any experience with underfill of HD connectors? New customer wishes to underfill 6 HD connectors that have been pressed into PCB. Capillary action is causing the conformal coat to wick up into connector. Material is acrylic.
Electronics Forum | Tue Sep 21 10:16:28 EDT 2004 | davef
Check with your connector supplier, but most press-fit contacts will pierce through Types UR & XY conformal coat (military approved). Acrylic (AR) Urethane (UR) Epoxy (ER) Silicone (SR) Parylene (XY)
Electronics Forum | Wed Nov 03 16:32:20 EST 2004 | dramos1
Hi Dave, Thanks a lot for the clarification. In order to be in compliance with IPC standard, ALL criteria has to be met [in conformance]. If either one did not met, then this is a non-conformance. Again, thanks really appreciate your help. With be
Electronics Forum | Wed Jan 12 09:08:33 EST 2005 | carobin
I was looking to see how others are handling conformal coating PCBs containing BGAs. We have looked at underfills, but none meet the reworkability we need.
Electronics Forum | Fri Jan 14 17:09:21 EST 2005 | Bob R.
Whether or not conformal coating creates a reliability problem if it bridges the gap between the board and bottom of the part depends on the properties of the coating. A low modulus coating is fine, but one thats modulus increases at colder temperat
Electronics Forum | Fri Feb 18 11:25:14 EST 2005 | davef
It's weird that it would be just 0805. When we see this it relates to a single part number and it goes way after a time. We use a Humiseal 1B73. I've emailed you the contact for a person that is very knowledgeable on conformal coatings.
Electronics Forum | Mon Apr 04 08:45:42 EDT 2005 | jimih280
how does polyurethane used for wood floor coating differ from urethane conformal coatings sold for circuit boards? where can i get uv tracer to put in oil based urethane?
Electronics Forum | Wed Jun 29 14:36:11 EDT 2005 | Steve
A customer of mine is using Chemtronics (Circuit Works) CW3300 Overcoat pen. This is an acrylic conformal coating. It cures at Room temperature. They need something similar that can be UV cured in a pen form. Any suggestions?
Electronics Forum | Wed Jul 06 22:34:19 EDT 2005 | davef
Many companies use IPC-CC-830B as a replacement for the deactivated MIL-I-46058 conformal coating standard.
Electronics Forum | Thu Jul 07 06:48:15 EDT 2005 | davef
Alternatives are: * DSCC Columbus continues to maintain the QPL for MIL-I-46058C. [Engineering is unlikely to change.] * Use International Electrotechnical Commission Standard, IEC 61086 - Coatings for loaded printed wire boards (conformal coatings)
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