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June 1997

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Subject:
Re: Tented Via Reliability
From:
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Date:
Wed, 11 Jun 1997 08:32:36 -0400 (EDT)
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Regarding tented vias, my concerns are the same
as Bob's.  We see problems such as:
1)  bare copper in the center of the hole where 
the solder mask does not reach
2)  plugged on one end and not the other - makes
a dandy cup to trap any liquid materials the board
sees after solder mask application - 

Susan Mansilla
Robisan Laboratory

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