Hello all ye experts out there:

Is there an IPC specs that calls for certain minimum copper thickness in the 
blind & buried vias? Is 0.5 mil the norm, or more is required??

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To: [log in to unmask]@INTERNET
From: [log in to unmask]@INTERNET on Wed, Sep 18, 1996 12:54 PM
Subject: Re: Users/designer of buried via product

Jenni,
It is not my experiance or expertise on buried vias (as a designer) you
should look for, rather the experiance and expertise of your PWB
manufacturer. Buried via technology has been around for quite some time and
most Board Houses offering this technology are quite comfotable and
proficient with it. If you bare board test you should be able to guarantee
acceptable yields ( I have my board house do this testing to assure I only
buy usable boards).
As a designer I always attempt to stay away from this technology as it cost
considerably more to fabricate and does not usually seem to "buy" me that
much in added real estate.

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