Dear Technetters:

There seems to be a few folks out there who are working military programs 
building printed circuit boards.  Most military boards that I have been 
associated with require that the boards be conformally coated. Usually, some 
portons of the board have to be masked off so that the masked area is free 
of coating. I have always used masking tape as a means of covering the 
masked areas.  However, pulling tape off of a dispenser or off the roll 
generates an ESD charge that can vary depending on temperature and humidity 
levels.  This charge remains on the tape and could potentially cause an ESD 
event on the assembly  where components  could be damaged. An event could 
also occur when tape is removed after coating.

Our experience with "ESD masking tape" has not been sucessful. The tape 
lacks "stickiness" and therefore tends to fall off or peel away.

What are some of the things other  contractors are doing. Any suggestions or 
do we "look the other way" when it comes to ESD and masking tape. Any and 
all comments are welcome. Please respond to the technet.

Thank you,

Bill Kasprzak - Moog Inc. , East Aurora, NY
716-652-2000 ext 2507
(Sorrry no "whizzy" graphics like the guy peering over the fence )

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