Dear TechNet Buddies,

In IPC-A-600, the standard provides states the inspection magnification requirement. For external observation : at 1.75x and progress to 40x if acceptable condition of a suspected defect is not apparent. Such inspection magnification requirement is not given in IPC-7095 for BGA x-ray. What is the common industry practice on :

(a)    Tube voltage

(b)   Tube power

(c)    Filter strength

(d)   Averaging

I asked because I worry that I may unintentional set a 'wrong' tube voltage that could result in the effect known as "Voltage Blooming'. I do not want to cause false alarm due to my incompetency and result in wrong inspection judgment on the void size.

Thanks and regards,
~wee mei~


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