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14:38 1996 |
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Sat, 10 Feb 1996 09:39:53 EST |
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PRODIGY Services Company Internet mailer [PIM 3.2-334.50] |
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Greg,
Do not EVER remove the lands from the outer layer. The pads are
necessary during the plating process. Removing pads will prevent
plating solution from getting in the holes. Even with a dot pattern
to allow plating, the quality of the plating will be horrible and non-
reliable. This is one of the main reasons for a minimum annular ring
requirement.
With good process control of plating, normal stresses will not effect
hole reliability
Regards,
Norm Einarson
Printed Circuit Technology
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