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November 1998

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Subject:
Re: Corrrection Annular Ring !
From:
Andy Cameron <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Sat, 7 Nov 1998 11:07:26 EST
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text/plain
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In a message dated 11/7/98 7:44:21 AM Pacific Standard Time, DSCPIONEER
writes:

Corrrection to first and second mail.

NOMINAL Finished Holes Size + (increase for copper plating and final finish
typ. .005" ) = drill size +(2 x annular ring requirement) + .010"
(manufacturing tolerance) = Pad size.

Example:  .035 FHS + .004 - .001 = NOMINAL Finished Hole Size = .0365" + .005
+ (2 x .002) + .010 = .0555"  >>

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