A small ball mill for board repair will work. Chip bonding adhesive will
work to hold it in place through multiple reflow cycles.

> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Tobias.Chang
> Sent: Tuesday, October 22, 2002 3:36 PM
> To: [log in to unmask]
> Subject: [TN] drilling hole for thermo-profile
>
>
> can anyone suggest methods for drilling small holes in PCBs
> to facilitate temperature profiling (putting thermocouples
> from under the board to the surface - under a BGA)
>
> and while i'm at it, can anyone recommend a specific epoxy or
> adhesive that can be easily applied to fill up the (small
> hole), that can handle the high temperatures, and hold the
> thermocouple in place?
>
> (i'm told this is the best practice to get accurate
> temperature profiles for BGA's - for a rework station, if
> there are better methods out there i'd be glad to hear about
> those too) =)
>
> thanks,
>
> toby
>
> ---------------------------------------------------
> Technet Mail List provided as a free service by IPC using
> LISTSERV 1.8e To unsubscribe, send a message to
> [log in to unmask] with following text in the BODY (NOT the
> subject field): SIGNOFF Technet To temporarily halt or
> (re-start) delivery of Technet send e-mail to
> [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE
> mailing per day of all the posts: send e-mail to
> [log in to unmask]: SET Technet Digest Search the archives of
> previous posts at: http://listserv.ipc.org/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 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/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
-----------------------------------------------------