Looks not too bad. However:
1.      Availability of laminates of 0.5oz/1oz is lower than 0.5/0.5 or
1/1. Not a show stopper, but check with the PCB manufacturer.
2.      Regarding controlled impedances - 
        *       Some of the laminate depth are not standard - some
adjustments will be made by the PCB shop.
        *       Although the nominal Dk is 4.3, the final one will be
0.5 unit less (3.8 to 3.9). Allow the PCB shop to adjust the traces
geometry, but keep an eye to ensure that no safety hazards (due to
possible changes of the stack up or shrink of the spaces between the
lands) or EMC/Signal integrity problems (due to reduction of the traces
and enhancement of the skin effect) are placed.

Sincerely
Ofer Cohen
Manager
Quality, reliability and Production Technologies
Seabridge - a Siemens Company 

> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Stephen Gregory
> Sent: Friday, February 25, 2005 20:54
> To: [log in to unmask]
> Subject: [TN] Manufacturability of PCB Stack-up...
> 
> Happy Friday All!
> 
> I've posted a drawing of a PCB layer stack-up at:
> 
> http://www.stevezeva.homestead.com/files/Stackup.jpg
> 
> I'd like to verify its manufacturability.  The reason for the 
> verification is that there are dielectric thicknesses that 
> vary quite a bit from layer to layer.
>
> Can anybody comment on this?
> 
> Kind regards,
> 
> -Steve Gregory-
> Senior Process Engineer
> LaBarge Incorporated
> Tulsa, Oklahoma
> (918) 459-2285
> (918) 459-2350 FAX
> __________________________________________________________________
> This message may contain information that is privileged and 
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> individual or entity named above.
> If you are not the intended recipient, you may not copy, use 
> or deliver this message to anyone.  In such event, you should 
> destroy the message and kindly notify the sender by reply e-mail.
> 
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