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Date: | Wed, 11 May 2005 15:35:10 -0500 |
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8 Layer
FR-4
40 mil hole
10 mil spacing
-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]]
Sent: Wednesday, May 11, 2005 3:13 PM
To: TechNet E-Mail Forum; Ted Tontis
Subject: Re: [TN] mouse bites causing me problems
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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