Hitachi says it has developed world's smallest IC chip

Hitachi said it has developed the world's smallest and thinnest integrated circuit (IC) chip, which can be embedded in paper to track down parcels or prove the authenticity of a document.
 
The IC chip is as small as a speck of dust, being just 0.15 mm by 0.15 mm square by 7.5 micrometers thick, Hitachi said. One micrometer is one-thousandth of a millimeter.
 

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