Thanks for the info. I'm not up to speed on the nuances of mat properties, but I
was worried over the heat, and the fact that these are the only boards
displaying this problem. Will continue to investigate.
Thanks. Ernie
"Misner, Bruce" <[log in to unmask]> on 31/10/2000 16:27:48
Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond to
"Misner, Bruce" <[log in to unmask]>
To: [log in to unmask]
cc: (bcc: Ernie Crump/WLO/Raytheon/CA)
Subject: Re: [TN] Silicone
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
>
> --------------------------------------------------------------------------
> -------
> Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
> To unsubscribe, send a message to [log in to unmask] with following text in
> the BODY (NOT the subject field): SIGNOFF Technet
> Search previous postings at: www.ipc.org > On-Line Resources & Databases >
> E-mail Archives
> Please visit IPC web site (http://www.ipc.org/html/forum.htm) for
> additional
> information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700
> ext.5315
> --------------------------------------------------------------------------
> -------
>
---------------------------------------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
Search previous postings at: www.ipc.org > On-Line Resources & Databases >
E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700
ext.5315
---------------------------------------------------------------------------------
|
