Pre-Reflow Inspection plays a key role in SMT manufacturing by detecting defects before the Printed Circuit Board (PCB) enters the reflow oven. Solder Paste Inspection (SPI) by Viscom verifies solder paste deposits after printing, checking parameters such as volume, height, area, position, and shape. After component placement, Viscom’s 3D AOIs (Automated Optical Inspection Systems) verify component presence, position, polarity, orientation, and alignment, helping identify potential defects at an early and cost-effective stage. Especially when high-value components are involved, detecting defects before Reflow helps prevent costly scrap, significantly reducing material waste and production costs. 

Combining SPI and pre-reflow AOI provides comprehensive quality control throughout the process before soldering. Early detection of solder pastes and placement defects helps reduce rework, prevent defective assemblies from progressing further, and improve process stability. With precise inspection technology and high-throughput, automated pre-reflow inspection supports higher first-pass yield, reliable PCB assembly, and efficient SMT production.