Erine,
It was probably a Silicon rubber mat (typically reddish in color) which can
withstand high temperatures and not Silicone. Silicon rubber typically
should not pose a problem and the UR peeling is probably from a different
source.
Regards,
Bruce Misner
> ----------
> From: Ernie Crump[SMTP:[log in to unmask]]
> Reply To: TechNet E-Mail Forum.;Ernie Crump
> Sent: Tuesday, October 31, 2000 2:59 PM
> To: [log in to unmask]
> Subject: [TN] Silicone
>
> We have had a vendor use a silicone rubber mat on his platen while bonding
> a
> heatsink to a polymide pwb, and we suspect that the silicone has become
> part of
> the pwb surface on the one side, as the UR coating process has produced
> fisheyes, and peelable coating, just on the one side.
> We use Bioact-7R, alcohol and then di water to clean in a proper monitored
> pwb
> washer, but the removal of silicone is very difficult.
> What cleaners are recommended for removing it, without destroying
> components, or
> leaching under the bonded heatsink?
> Thank you. Ernie Crump Raytheon Systems Canada.
> Phone 519-885-0110, fax. 519-885-1178
>
> --------------------------------------------------------------------------
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>
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