Hi,TechNetters,

We are useing 4 mil double treatment thin core from AlliedSignal to build 
PCMCIA innerlayers. We find a great difficulty in instpection innerlayers with 
AOI (Insight/2020 Gerber).The machine just cann't see the deference between
the circuit and background.

To get a threshold value, we try defferent settings,

        *Changing high-inspection lamp
        *Adjusting the image threshlod sliders
        *Adding filters either on specular side or diffuse side, even on both 
         sides.(600nm spectral filters)

The result is negetive.

I'm appreciate if anyone with thin core AOI instpetion experience can provide 
an answer.

Thanks

Wendy Fung

R&D Engineer
Guangzhou Printronics Circuit Corp

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