Minimizing Radiation to Components

Bernard, David; Blish II, Richard C.
July 2003
Circuits Assembly;Jul2003, Vol. 14 Issue 7, p18
Trade Publication
Filters during x-ray can reduce radiation without compromising image quality. X-ray inspection has become ever more important for checking product quality as it allows investigation within optically hidden areas, such as the quality of post-solder reflow of area array devices like ball grid arrays, chip-scale packages and flip chips. During inspection, the sample is bathed in the ionizing radiation of high-energy photons and receives a dose of radiation. Large radiation doses cause almost certain failure, but, during shop floor x-ray inspection, the device is not subjected to doses large enough to cause failure.


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