Weidmüller is a leading international provider of solutions for electrical connectivity,transmission and conditioning of power, signal and data in industrial environments.The company with headquarters in Detmold/Germany develops, produces and sellsproducts in the field of electrical connectivity and electronics all over the world.
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Technicalappendix
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SMT design-in recommendations
Quality control
Quality control completes the SMT production process.
Control process:
The process quality control can achieved using various
methods. The
goal this process step is, using appropriate techniques, to
check the quality the solder joints the THR components
with short long pins quickly and easily. important
control factor are destructive testing addition the
inspection process. Currently optical X-ray examination mostly used. Random samples are taken and used to
verify measurable quantities:
• Analysis the filling behaviour cutting through the solder
joint
• Mechanical testing the pin pull-out resistance from the
contacts
Cutting through the THR solder joint with the short pin
.
In X-ray inspection, however, radiographic evaluation using
automated X-ray microscopy carried out. The quality control
rules for the THR solder technique are the same for flow or
wave soldering THT components.
The optical examination evaluates the shape, reflectivity and
colour the solder joints.
In the manual process, magnifying glass microscope is
used, the automatic process computer controlled camera
and software based image analysis used
