---------Included Message----------
> From: "Chris Robertson" <[log in to unmask]>
> Subject: Re: [DC] Blind and Buried Vias
>
> Not debating it I just want to find out what annular ring
> you are using? (collecting data)
Hi Chris,
Have you seen what the latest IPC specs recommend for annular ring, and
are you using it? It used to call out .005" external and .002" internal;
now it's half that. Is anyone using these "most stringent"
requirements?
I'd really like to know. The manufacturing engineer I worked with didn't
really seem conceerned when I pointed it out, since we add in so many
other tolerances.
Just wondering... :)
Have a great Easter.
Mitch
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