The support is the barrel. Plated holes are supported and non-plated
holes are unsupported.
Jeffrey Bush
Director, Quality Assurance and Technical Support
VERMONT CIRCUITS INCORPORATED
76 Technology Drive - POB 1890
Brattleboro, Vermont 05302
Voice - 802.257.4571 ext 37
Fax - 802.257.0011
<http://www.vtcircuits.com/>
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Babcock John
Sent: Wednesday, December 28, 2005 1:09 PM
To: [log in to unmask]
Subject: [TN] supported vs unsupported
In IPC-A-600 it talks about minimums for external annular rings...but I
cannot find a definition for supported or unsupported holes.
What is the difference? Does supported have a trace attached?
John
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