Hi Peter,
By definition, for holes in Printed Circuit laminates with LANDS or PADS, a
supported hole has plating in it or an Eyelet to support the hole thus
providing mechanical support to the hole structure. By contrast, a
non-supported or un-supported hole does not have plating in it.
Mechanical mounting holes are typically non-plated, un-supported holes.
Tooling holes most commonly have no pads or plating in them. Vias are
typically supported holes with plating in them. Hope that clears it up...
Bill Brooks
PCB Design Engineer , C.I.D., C.I.I.
TITAN SYSTEMS CORPORATION
DATRON WORLD COMMUNICATIONS DIVISION
3030 Enterprise Court,Vista, CA 92083
Tel: (760)597-1500 Ext 3772 Fax: (760)597-1510
Adjunct Instructor - PCB Design
Palomar College, 1440 West Mission Road
San Marcos, CA 92069-1487
http://www.palomar.edu/
Member of the IPC Designers Council
http://dc.ipc.org/
Executive Board
Steering Committee
Education Committee
San Diego Chapter of the IPC Designers Council Core Group
Board of Directors, Communications Officer and Webmaster
<http://www.ipc.org/SanDiego/>
<http://home.fda.net/bbrooks/pca/pca.htm
-----Original Message-----
From: Peter Lee [mailto:[log in to unmask]]
Sent: Tuesday, June 25, 2002 12:22 PM
To: [log in to unmask]
Subject: [TN] Definition of Suported/ unsupported hole
Technet,
Can anyone explain the difference between a supported
and unsupported hole on PCB?
I am reading a section on IPC-A-600 RevF and section
2.10.3/4 specify difference acceptance criteria
according to the hole type.
Rgds,
Peter
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