What is SMT? Learn about Surface Mount Technology: advantages, process flow, difference from THT and why SMT is the dominant assembly technology.
What is SMT?
SMT (Surface Mount Technology) is an assembly method where electronic components are soldered directly onto the surface of a circuit board.
SMT (Surface Mount Technology) is the most widely used technology for populating PCBs. Unlike through-hole technology (THT), components are soldered directly onto the board surface rather than inserted through drilled holes.
Process and Application
The SMT process starts with stencil printing, followed by high-speed pick-and-place machines positioning SMD components on the board. The reflow oven then melts the solder paste to form permanent connections.
Advantages include smaller components for compact designs, double-sided assembly for higher density, and high automation for consistent quality. Modern SMT lines at SMTEC process components down to 01005 size (0.4 x 0.2 mm) and complex packages like BGA, QFN and fine-pitch components.
Frequently Asked Questions
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