Yes I do think it would help.
It would help even more to do as you suggest also.
I can't say why the dummy core is where it is ...only the customer can, maybe for impedance, although that's an awfully thick dielectric spacing for a controlled impedance layer.

Tim

-----Original Message-----
From: Franklin D Asbell [mailto:[log in to unmask]]
Sent: Thursday, April 24, 2003 11:42 AM
To: TechNet E-Mail Forum.; Tim Reeves
Subject: Re: [TN] Warpage


Tim,

Do you really think swapping the prepreg as you wrote would make a
significant difference? I'm thinking unless that 28 core is not moved to the
center, or split between two lesser, balanced cores, you will still end up
with a pringles, unsalted...

Is that 28 core there for a specific impedance requirement?

Franklin

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