Influence of material properties on the aperture filling during stencil printing process
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Date
2018-06
Authors
Muhammad Farid Mohamad Rafdzi
Journal Title
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Abstract
High requirement of smaller size, lighter weight, and high performance Printed
Circuit Board (PCB) in electronic packaging has contributed to the wide application of
stencil printing for soldering process. Stencil printing offers good consistency of
soldering performance as well as produce larger process output at short time that make it
one of the best option for high volume application in Surface Mount Technology (SMT).
However, the soldering method also contributes to major percentage of soldering defect
compared to other methods which is necessary to be addressed through research and
development. One of the common defects due to the stencil printing is regarding to the
printing quality of solder paste on substrate such as PCB with respect to the variation of
process parameters. Uncontrolled process parameters cause the soldering defects such as
solder bridging that can lead to product failure in further processes in production line.
An experiment has been conducted to analyse the influence of material properties
on the aperture filling during solder printing process. The studied parameters are the
printing speed, printing load and the printing direction. The study had found that the
printing speed 35mm/s to 45mm/s has potential to obtain good print quality of solder
filling. Printing load of 8kg to 9kg shows the good printing load option to achieve good
print quality in stencil printing process. Finally, the reverse direction of printing mode
shows a better quality compared to forward direction of printing mode.