Hitachi has just rolled out a worryingly small RFID chip, measuring an impressively tiny 0.15 mm x 0.15 mm x 0.0075 mm. The chip packs in a 128-bit ROM, which is able to store a 38-digit number. Hitachi previously held the title for world's smallest RFID, but the now second place tag was comparatively large at 0.4 mm x 0.4 mm.

The reduction in size was achieved by utilizing the silicon-on-insulator (SOI) process, where the transistor is formed directly on the silicon base. It may be disparaging to know that an RFID chip, measuring 0.15mm x 0.15mm x 0.0075 mm, holds the title for world's smallest item in that category, whilst simultaneously being far larger than your winky. Hey, at least your twinkle can memorize 38-digits... oh, it can't? Why do you wake up in the mornings? [TFOT]

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