Surface Mount Technology: What is SMT?

Surface mount technology components on a narrow circuit board.
Surface Mount Technology components in place. By JCHaywire. CC BY-SA 2.0

Surface mount technology has changed how printed circuit boards are designed. But what do you know about it?

The 1970s and 80s saw a sharp rise in the need for PCBs (printed circuit boards.) To meet that demand, designers had to find a way to manufacture boards more efficiently.

But the traditional way of mounting components–using pre-formed lead wires connected to the board through plated through holes–didn’t allow for fast assembly. Components had to line up at the correct angle before they could mount to the surface, slowing down assembly.

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