Analysis Defect Insufficient Solder J2 on PCBA Model CG200-20244-004

Abstract

Insufficient Solder is a condition where there is not enough solder so that the solder is not able to form a good joint. In the production process of PCBA CG200-20244-004, there was an insufficient solder defect at the J2 location. This study aims to analyze the causes of insufficient solder defects using fishbone diagram. After the analysis, the author concluded that the insufficient solder defect occurred due to material factors, namely the thickness of the stencil not able to cover the coplanarity lead component. The stencil thickness used in this model is 3.5 mils or 0.089mm, but based on the results of the coplanarity measurement, there are several components with a coplanarity close to 0.089mm so that the stencil thickness is not able to cover the lead of component. One way to prevent defects from happening again is to increase the thickness of a special stencil at the J2 location from 3.5 mils to 5 mils. With the increase stencil thickness, the solder paste printing results also increase so that it is able to cover the coplanarity of the component.