Each of the seven segments is a single 0201 LED. Six I/O lines and three resistors ... featuring an ATtiny84 microcontroller coupled to PCB footprints sized to receive the NanoRaptor NanoSegment ...

You can do your own Surface Mount Technology ... on the PCB; it can be manually applied using a syringe and good old fashion squeezing to deposit the solder onto the connector pads of the PCB.