Hi Richard,
In a message dated 02/20/2002 19:00:45, [log in to unmask] writes:
>there are probably advantages in dropping off much faster, particularly from
the reflow peak to well
>under liquidous (maybe as fast as 4 C/sec?).
No, there is no advantage in dropping off much faster, in fact you risk
fracturing your just formed SJs due to warping because of the thermal shock
temperature gradients.
Werner Engelmaier
---------------------------------------------------------------------------------
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
To temporarily halt delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
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
---------------------------------------------------------------------------------