You're kidding! They need to be testing all of them. Why bother with testing one from each lot? The point of bed-of-nails electrical test is to screen out defective boards. Otherwise, don't bother testing any.

Timothy Reeves
Technical Service Engineer  -  Matsushita Electronic Materials  -  Forest Grove, OR
(503) 992-5109      (503) 357-8868 Fax     (503) 781-1495 Mobile


-----Original Message-----
From: Charles Caswell [mailto:[log in to unmask]]
Sent: Monday, May 19, 2003 1:23 PM
Subject: Re: PCB_OPEN_VIAS_PROBLEMS


In our case I have been told that the netlist testing is only done on one out of the lot. 
Charles

-----Original Message-----
From: Fineline Circuits, Inc. [mailto:[log in to unmask]]
Sent: Monday, May 19, 2003 4:26 PM
To: [log in to unmask]
Subject: Re: [TN] PCB_OPEN_VIAS_PROBLEMS


Wesley:
Weren't these boards tested by your board supplier? Electrical testing
should have failed the boards with the open vias . The vias may have voids
due to bad drilling and deburring which may clog the hole, poor smear
removal or malfunction of the electroless copper line-trapped air or could
be plating voids. Cross section of the open vias should pinpoint the
problem.

Sona
Fineline Circuits Inc.

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