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There is no consistently accurate means now in use for inspecting
populated printed wiring boards. Inspection is often performed
by humans looking through a microscope to discern whether each
solder joint is properly joined, and that the parts are in the
proper configuration.The research group is eliminating the 4-pi
X-ray system's sole dependancy upon CAD data and creating an x-ray
inspection station with a point-and-click interface that makes
inspection less laborious, less time-consuming, and more accurate.
X-ray inspection has a number of benefits for manufacturers, such
as allowing inspection of Ball Grid Array packages where it is
physically impossible to visually evaluate a joint that is located
underneath the package. The research group is also extending x-ray
inspection capabilities through the Internet where a remote computer
site will be able to control the inspection. This service will
allow a manufacturer of small lots to inspect a board without
capital investment, transfer of personnel, or long time delays.

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