Perfectest uses a coupon system that utilizes stepping of conductors in
which the spacing between adjascent copper strips are reduced by around
0.002 inch per step. A series of holes is then drilled between these copper
strips and, should one of the plated holes touch the copper strip thereby
causing an electrical short, you can determine the magnitude of the error.
Perfectest includes are rather elegant semi-automatic machine for measuring
these movements FOR EACH INDIVIDUAL LAYER. By carefully analyzing the data,
you can establish whether the movement of material is due to offset,
rotation or shrinkage.

Dave Rooke
Circo Craft -  Pointe Claire


>     
>Hi all
>
>Could someone please explain what this test is about...sounds interesting..
>Thanks..
>
>Mohit Gujral
>
>______________________________ Reply Separator
_________________________________
>Subject: Re: PerfecTest
>Author:  [log in to unmask] at uucpmail
>Date:    10/1/96 7:41 PM
>
>
>     
>     Steve: Yes we have it at Zycon and it is a useful tool for improving 
>     registration.
>     
>     
>______________________________ Reply Separator
_________________________________
>Subject: PerfecTest
>Author:  [log in to unmask] at corp
>Date:    10/1/96 4:15 PM
>     
>     
>Does anyone have any in-the-field experience with PerfecTest from   
>American Testing Corporation?  The package is supposed to be able to help   
>reduce scaling and registration errors.  Thanks in advance.
>     
>     
>     
>Steve Stone
>Process Engineer
>Altron, Inc.
>508/658-5800  XT1621
>[log in to unmask]  
>     
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