Dunno understand w u need calibrate. U have balls as reference, don't you?
Inge

----- Original Message ----- 
From: "fabrice pires" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, September 09, 2008 7:50 AM
Subject: [TN] precise void size measurement


> Hi Techneters,
>
> I would like your advices on the best way to calibrate XRay pictures in 
> aim to measure precisely voids inside BGA balls, after assembly.
> Everyone should agree on the fact slight setup variation on XR equipment 
> could change significantly the void size results.
>
> Do you have any trick to improve precision measures whatever the XR 
> equipment?
> Does the use of any reference/calibration on boards exists in that aim?
>
> Fabrice
>
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