What is SPI in SMT Production? Solder Paste Inspection Guide (2026)

In modern SMT (Surface Mount Technology) production, achieving high-quality PCB assembly is becoming increasingly challenging due to smaller components, higher density designs, and stricter quality requirements. One of the most critical factors affecting final product quality is solder paste printing—the very first step in the SMT process. This is where Solder Paste Inspection (SPI) becomes essential. […]

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