What laminate material? I've seen a lot of CEM-1 and CEM-3 peel  at
'mousebite' breakaways. Haven't seen that with FR4.

-Chris




                       Ted Tontis
                       <[log in to unmask]        To:   [log in to unmask]
                       OM>                               cc:
                       Sent by: TechNet                  Subject:    [TN] mouse bites causing me problems
                       <[log in to unmask]>

                       05/11/2005 03:57 PM
                       Please respond to TechNet
                       E-Mail Forum; Please
                       respond to Ted Tontis







Currently we are running a prototype on five boards. Three out of the
five are having problems with the snap off rails, the edge of the board
is routed with three mouse bites keeping the rail attached. When the
rail is removed it takes along with it solder mask and what appears to
be epoxy. (In one instance it lifted a trace off the PCB) My first
thought is that the epoxy or solder mask is under cured, my second is
that there is contamination under the solder mask preventing it from
adhering to the PCB. Has anyone come across a problem like this before?
If so what was the cause. Am I wrong in thinking that the laminate might
be under cured?



Thank you,



Ted Tontis CID

NPI Engineer

Creation Technologies Inc.

2250 West Southbranch Boulevard

Oak Creek, WI 53154

Phone 414-761-0400 x6530

Fax 414-761-0582

[log in to unmask]

www.creationtech.com <http://www.creationtech.com/>








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