The concern that I see is the PWB itself does not bear a mfg. logo as
part of the outer copper plane. The logo has been place with silk
screen.   Now a day anyone can do a silk screen process.

Victor, 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of N Burtt
Sent: Monday, June 25, 2007 3:31 AM
To: [log in to unmask]
Subject: Re: [TN] Vendor Markings

If your product is required to be UL compliant and you want to the UL
logo on 
the outside then the component parts also need to be UL compliant. The
UL 
inspector will want to be able to trace the source of your PCB back to
an 
approved supplier who is UL qualified to build that PCB and using the
specified 
laminate material and required construction. The UL website has a logo
lookup 
database which allows you to check this very quickly. Without the
necessary 
markings its more dificult and bureaucratic to prove this.

Marking can be in silkscreen legend, does not have to be in copper

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------