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Tue, 26 Feb 2002 11:01:51 -0500 |
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Hello Ginny:
I would suggest that the layer in question is not coated with oxide.
The next layer down (assuming it's a plane) did receive an oxide coat.
Charlie McMahon
Genny Gibbard wrote:
>Hi,
>We just received a new rev of a PWB in house. It has not been populated
>yet. It looks like it has been built correctly - the right layer order,
>connections, etc - but it looks different than the rest of our 4 layer
>boards. Normally the traces on the inner layer that is closest to the
>surface appear dark in colour and the deeper layer appears lighter. This
>board is the opposite. The layer closest to the surface is light in colour
>and the deeper layer is dark. Also, the FR4 seems much easier to see
>through than usual.
>
>Any thoughts or explanations for this?
>Thanks for your time.
>
>Genny Gibbard (mailto:[log in to unmask])
>
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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
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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
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