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February 2022

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Subject:
Re: Standard PTH Annular Ring Dimension
From:
Jesus Castane <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Jesus Castane <[log in to unmask]>
Date:
Thu, 3 Feb 2022 09:15:10 +0000
Content-Type:
text/plain
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text/plain (23 lines) 
Hello Victor,

There are many nuances while choosing the via structure dimensions, like
IPC Class, aspect ratio, tolerances on the finished hole size, number of
layers, materials... but as general rule a minimum annular ring of 6mils
(0.15mm) is a safe choice.
For a 8 mils (0.2mm) drill I would recommend a pad size of 20 mils (0.5mm)
should be achievable for most manufacturers.

Kind regards,
Jesus



On Wed, 2 Feb 2022 at 20:38, Hernandez, Victor G <
[log in to unmask]> wrote:

> Fellow TechNetters:
>     What is the standard PTH annular ring diameter for an 8 mil drill bit?
>
> Victor,
>

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