We "baked" boards at 55°C for 12 hours (best we could do) (13" x 17" boards,
4 layer, 12 per batch).  The results were not good.  Our survival rate was
about 80%.

Our PCB fab shop suggested 150°C for 4 hours.


Richard Elensky
Sr. Manufacturing Engineer
[log in to unmask] <mailto:[log in to unmask]> 

Tel:  559-292-1111  x246
Fax:  559-292-9355

Dantel
2991 North Argyle Ave.
Fresno, CA, 93727
Visit our web site at:
http:// www.dantel.com <http://www.dantel.com> 


        ----------
        From:  Yu-Hung Shiau [SMTP:[log in to unmask]]
        Sent:  Wednesday, October 03, 2001 4:25 PM
        To:  [log in to unmask]
        Subject:  [TN] PCB baking conditions

        Hi,
        * Is anybody sure about the temperatre and time for baking the bare
PCBs
        that were humidified by condensed moisture to prevent SMT problems?
        * Is 120F for 2 hrs appropriate?
        Thank you for any input.
        YH Shiau

	
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