Peter, a "supported hole" is one that is "plated through" with a metallic material, usually copper followed by tin/lead or such. An unsupported hole is one that contains no plating or other metallic material.
Usually supported holes (plated-through-holes [PTH]) have connecting circuitry on both sides of the board, where as, unsupported holes may have one connecting circuit or even none.
I hope that clarifies it for you.
IPC-A-610C figures 6-4 and 6-27 show examples of plated through (supported) holes.
Figures 5-11 and 5-13 show examples of non-plated though (unsupported) holes.
Ron Dieselberg
Trainer/Auditor
CMC ELECTRONICS
CINCINNATI
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-----Original Message-----
From: Peter Lee [mailto:[log in to unmask]]
Sent: Tuesday, June 25, 2002 15:22 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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