We are a fabricator and we prefer to see IPC 6012, Class 1, 2 or 3 specified
depending on the reliability issues you are needing.

Generally for straight commercial product IPC 6012, Class 1 is a very
sufficient standard

We see class 2 for higher reliability product and Class 3 on critical
reliability items for aerospace, defense and that type of board.

Hope this helps. You can order these specs off the IPC web site at
www.ipc.org

Paul Olson
V.P. Sales
Taylor Technologies Inc.
512-365-2244
www.TaylorTechnologiesInc.com


Paul Bannister wrote:

> I am trying to update and standardize the notes that appear on our printed
> circuit board fabrication (drill drawing) drawing.  The current drawing
has
> over 20 notes detailing things like hole registration electroplating
> thickness, wrap and twist ECT.  I would like to reference one
specification
> that covers all aspects of the board fabrication and eliminate all the
> specific notes.
>
> Is there and industry standard on what needs to be specifically called out
> on the fabrication drawing and what is the best specification to reference
> (IPC-A-600?) for fabricating 4 layer commercial grade surface mount PCB's.
>
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