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July 1997

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Subject:
From:
Jan Thuesen <[log in to unmask]>
Date:
Fri, 11 Jul 1997 13:26:57 +0200
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I have seen some types AOI-equipment for inspection of PCB´s. 
None of the type used any kind of chemicals to prepare the prepreg.
Instead the systems used a combination of reflective and diffuse light (key point in AOI),
which can illuminate the PCB in a way so that the prepreg looks like it were fluorescent. 
I have never seen a system, which were based on fluorescence of the prepreg?

We are using the AOI-systems from Orbotech and very satisfied with the performance.
Compared to other systems it has a high ratio of reproducibility.

Best regards

Jan Thuesen



-----Oprindelig meddelelse-----
Fra:	Kuwako, Fujio(MMS) [SMTP:[log in to unmask]]
Sendt:	 11. juli 1997 08.36
Til:	[log in to unmask]
Emne:	Fw: Chemicals for AOI

Is anybody in this industry tell me what type of chemicals are being used
for giving fluorescence to the prepreg material for AOI equipment?

Kuwako     
[log in to unmask]

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