A PCB is a substrate or laminate that supports and connects electronic components to enable various device functionalities. Common substrates include FR4 (flame retardant material), but there are alternatives such as polyimide for flexible designs. PCBs are categorized by layers—single-sided, double-sided, and multi-layer—and by substrate type (rigid, flexible, or rigid-flex combinations)
Surface Mount Technology (SMT) board assembly is a critical and widely used process in modern PCB manufacturing. This process involves placing and soldering electronic components directly onto the surface of PCB pads.