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March 2011

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Subject:
From:
Technet Legg <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Technet Legg <[log in to unmask]>
Date:
Tue, 29 Mar 2011 09:09:41 -0500
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It goes both ways. My board notes always include the instruction 'No
conductive patterns to be added by vendor. UL and Vendor information on
Silkscreen in iindicated area." 

This because, inevitably, the vendor got it wrong - printing copper in
safety creepage and clearance areas.

RL

On Thu, 24 Mar 2011 15:12:39 +0000, James Head <[log in to unmask]> wrote:

>Jack,
>
>I just put a text call out on the fabrication drawing pointing to an area
of the board with the following note:
>
>"PCB fabricator to mark board with UL logo, their
>company name, and UL file number, on top
>silkscreen, in this area.  Match orientation of
>existing silkscreen characters."
>
>
>When I worked as a front end CAM engineer for Graphic our procedure was to
delete any UL marking the customer had put on the board and replace it with
our own as I was told the customer nearly always got it wrong and ours was
correct.
>
>Regards,
>James
>
>James Head BEng CID MIIE MIET
>Senior PCB CAD Engineer
>Crowcon Detection Instruments Limited
>2 Blacklands Way
>Abingdon Business Park
>ABINGDON
>OX14 1DY
>Telephone: 01235 557700 extension 289
>Fax: 07092024504
>E-mail: [log in to unmask]
>
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