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March 2003

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Subject:
From:
Franklin D Asbell <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 27 Mar 2003 09:53:16 -0600
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From what I've observed, you would have to remove a heck of a lotta pads,
and begin with over 1 ounce copper to really start seeing problems... We
have had to make adjustments of course, to the layup including prepreg type,
but these are very rate occurences...

Franklin

----- Original Message -----
From: "Werner Engelmaier" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, March 27, 2003 8:46 AM
Subject: Re: [TN] non functional pad removal


> Hi Bill,
> Removing non-functional lands leads to a higher propensity for resin
> recession and inner-layer separation [post separation] for larger diameter
> holes. Whether or not this will cause any real problems depends on the
> details.
> The barrel integrity is not significantly affected.
>
> Werner Engelmaier
> Engelmaier Associates, L.C.
> Electronic Packaging, Interconnection and Reliability Consulting
> 7 Jasmine Run
> Ormond Beach, FL  32174  USA
> Phone: 904-437-8747, Fax: 904-437-8737
> E-mail: [log in to unmask], Website: www.engelmaier.com
>
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