Hitachi has presented world's smallest and thinnest IC chip. The chip measures 0.15mm by 0.15mm and is only 7.5 micron thick!
Paper is typically 80 microns to 100 microns thick, and the chip substrate has been made small and thinned to 7.5 micron to ease application in paper, where it could be used as an intelligent watermark.
Hitachi has been pursuing such “embedded” applications for its “Mu-chip” for years. The company integrated an antenna on an earlier version of the chip in September 2003. In the latest version, the company has reduced the plan dimensions and the thickness of the chip.
More information about this chip can be read over at EE Times.