Causes and Solutions for Solder Beading
Industry expert Bob Willis explains how to address solder beading, a defect usually found on chip components. Hint: it's your stencils.
Defect of the Month
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Defect of the Month are short informative programs produced by Bob Willis.
Bob is an electronics manufacturing consultant providing solutions for process and product failure trouble shooting, in-house training, process engineering support
on conventional and SMT,
lead-free production plus process and product failure analysis.
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Comments
The tricky part would be to determine the amount of reduction needed underneath the chip, a great guidance to do that would be by drawing chip layout using the mechanical drawing in the datasheet and compare it to the SMT pads in copper layer, this way will make it easy to tell.
Labib B. Saleh, FCT Assembly, USA
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