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December 2007

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Subject:
From:
Lee parker <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Lee parker <[log in to unmask]>
Date:
Mon, 3 Dec 2007 15:48:11 -0500
Content-Type:
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Avigdor

Given the CI requirements currently being imposed, it is imperative that the 
impedance be measure either on the board or on a coupon from the same 
production panel. It is also very cost effective to design the CI traces and 
dielectric thicknesses using a field solver.
Blindly using tables without knowing the underlying assumptions is 
comparative to landing an airplane blindfolded and without instruments.

Best regards

Lee

J. Lee Parker, Ph.D.
JLP Consultants LLC
804 779 3389


----- Original Message ----- 
From: "Avigdor JAkubinsky" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, December 03, 2007 2:08 PM
Subject: [TN] Calculated Impedance vs. CI with coupon


Hello friends,

It is always the question of controlling (CI) with Coupon measurement on the
stack.

Would any of you The Experts trust a meticulous Calculated approach without
actually measuring the outcome impedance Out of the coupon?

I would appreciate your pointer/Link to any written facts publishes at any
given year along with your personal opinion.

Best Regards

Avigdor Jakubisnky
Engineering Mgr.
www.fibrolan.com

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