Flexible 'fiber chip': integrating high-density integrated circuits into an elastic polymer fiber

• • Achieves an integration density of 100,000 transistors per centimeter, a 100-fold improvement over surface-limited schemes, enabling complex computation within fiber form factors. • • Demonstrates 99.8% classification accuracy on the Olivetti Research Laboratory database using neural-style computing with organic electrochemical transistors, proving feasibility for on-fiber AI. • • Withstands 100,000 cycles of abrasion and 1-mm bending, ensuring mechanical reliability for wearable applications under repeated deformation. • • Implements digital logic gates (NOR, NAND, XOR, RS latches) and analog circuits (amplifiers, waveform generators), matching early commercial chip capabilities and enabling standalone fiber-based processing.