TECHNET Archives

November 1997

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Patrick Ducas <[log in to unmask]>
Reply To:
TechNet Mail Forum.
Date:
Tue, 4 Nov 1997 16:07:28 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (38 lines)
Hi, I would greatly appreciate any help or any recommendation in the
following subject...            	

We are having solder residues on gold fingers of PCBs, those are seeing
immediately after the reflow oven (it's a recirculation convection reflow
solder system). A visual inspection  has been done after the printer
machine at high magnification and nothing showed up. We were thinking that
the problem was from the printer machine since a long time but we found
that it is not the case today.  

I suspect that the problem is coming from the reflow oven but I dont see
the problem mechanism. The reflow atmosphere is nitrogen and the ramp up
temperature at the entrence of the oven is relatively high, arround 3.4
C/sec. 

Does anyone of you have an idea concerning this problem, thanks in advance. 
 
-------------------------------------------------
Patrick Ducas
Process Quality Engineer 
Matrox Electronic Systems Ltd
E-mail: [log in to unmask]
Tél:(514)969-6000 ext.2971   Fax:(514)685-3415
-------------------------------------------------
        	

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311
##############################################################


ATOM RSS1 RSS2