Hello All

I am responding to the message below, however I did not see the original.
I would like to say something about AOI, although it might be out of
content.
An AOI machine which can inspect surface circuitry, innerlayer or
outerlayer,
cannot inspect the entire board for electrical connections.  A finish bare
board
would have to be electrically tested to give the best guarantee of a 0
defect
product.

Most manufactures of medium to large volume will AOI inspect innerlayers
prior
to an oxide or pressing operation and after SES( Strip resist, etch, strip
solder)
for surface defects.

John Haman Jr.
American Board Companies, Inc.

----------
> Hello every one,
> I received several answers related to the potential assembly difficulty
> and yield problems due to the dents and witness marks caused by the bare
> board testers.
> I agree that these marks could get you comfortable by knowing that it
> was tested, but don't you trust equipment? AOI does not leave any marks
> at all and yet people use them everywhere.
> I agree with Steve that prefers having no marks and avoiding problems at
> the assembly rather than having witnessed test that could cause
> problems.
> Centering the bed of nails fixture iss not always simple due to panel
> distortion.
> David Banitt
> Exsight
>
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