Teeny-Tiny RFID µ-Chip

In this year's ISSCC (International Solid-State Circuits Conference) Hitachi is showcasing a 7.5 micron thick RFID chip. It will measure 0.15x0.15mm in dimension and will be 10 times thinner than a sheet of paper.

URLSource: http://www.eetimes.com/news/design/showArticle.jhtml?articleID=179100286

seen below is a 0.4x0.4mm chip.