Tom,
        IPC-A-610 Rev C, Sec 8.2, Screened Markings, Acceptable Class 1,2,3:
"Marking ink on the land does not interfere with soldering requirements."

Reject Class 1,2,3: Marking ink is present on the land interfering with the
solder requirements of Table 6-2 (Minimum Acceptable Conditions, Plated
Through Holes With Component Leads) or with the surface mount soldering
requirements of Section 12 (Surface Mount Assemblies).

In other words, it's OK as long as you can meet your minimum acceptable
joint requirements in regard to wetting, fill and fillet. It doesn't mean
you should accept it from your fab vendor on an ongoing basis though....

Mike McMonagle
Senior SMT Process Engineer
Telxon Corporation
(713) 307-2443 Phone
(713) 307-2581 Fax
www.telxon.com

' Innovative Solutions for
Mobile Information and
Wireless Communications'



-----Original Message-----
From: Hybiske, Tom [mailto:[log in to unmask]]
Sent: Thursday, May 25, 2000 10:49 AM
To: [log in to unmask]
Subject: [TN] Searching for IPC "marking" spec





Was wonder if anyone can point me to the IPC spec which specifically states
how close silk screen marking on a printed wiring board can be to land
areas?

Thanks,
Tom Hybiske
General Atronics Corporation
Wyndmoor, PA

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Keach Sasamori at [log in to unmask] or
847-509-9700 ext.5315
##############################################################