Franklin,

 If AOI can detect faults consistently, I would be incline to try boards that were machine
inspected and not electrically tested.  I have found that there can be a small percentage
of electrically tested boards that end up getting caught at my ICT.  If AOI gave me better
results - what the heck.

Would AOI be able to catch over and under etch conditions better than electrical testing?

What fabrication steps would be done to the boards after inspection that could damage a
known good board?

Gary Camac

Gary Camac

Franklin D Asbell wrote:

> Just read an article in "The Board Authority" regarding Automatic
> Optical Test (AOT).
>
> Just wondering what you assemblers or purchasers of bare boards thoughts
> are on fabricators performing 'optical testing' (visual, AOI)  instead
> of 'contact testing' (BON, probe)????
>
> An example: You state all boards to be electrically tested for
> opens/shorts, and instead of throwing the boards on our flying probe or
> bed-of-nails equipment I decide to put this on my AOI after setting it
> up to flag for opens/shorts, would you be satsified with this method?
>
> Franklin D Asbell
> Network Circuits, Inc.
> Irving, Texas 75061
>
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