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Surface-Mount Technology (SMT) refers to the way components are mounted on a PCB: SMDs (Surface-Mounted Devices) have pins or contacts which lay on top of the PCB's pads, without the need for holes in the PCB.

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How can I indicate pin 1 on a SMT package footprint without silkscreen

Unless there are tight tolerances for the pad layout use a different shape pad for pin 1. i.e. oval instead of square. Edit: the difference between this answer and previous answers is the difference …
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