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Subject:	Micro-modification fab drawing note
From:	Gary Koven <[log in to unmask]>
Reply To:	Gary Koven <[log in to unmask]>
Date:	Tue, 18 Dec 2012 16:05:55 -0800
Content-Type:	text/plain
Parts/Attachments:	text/plain (38 lines)

We just had a case of a CM taking it upon themselves to micro-modify footprints on source Gerbers and then complain to us about the yield, blaming the areas which they
micro-modified.

This has motivated us to consider adding a micro-modification note to our
boilerplate drill drawing layer. This is my first cut at such a note:

"MICRO-MODIFICATIONS OR ANY OTHER CHANGES TO CONDUCTIVE FEATURE PATTERN ON SOURCE GERBERS ARE NOT
PERMITTED WITHOUT PRIOR APPROVAL OF (COMPANY NAME)".

There isn't much to go by on this topic in any of the IPC specs or on the Web. Please correct me if there's an IPC spec out there that addresses this issue.

Anyone else who has experienced this, and can improve upon this wording, please share.

TIA and Best Regards,
Gary M. Koven, C.I.D.
InVue Security Products

Charlotte, NC, USA
Board Of Directors, RTP Chapter

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