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Send til en ven   Udskriv27/4 2011 kl. 13:18
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8-bit organisk microprocessor kan integreres direkte i en plastfolie

Europæiske forskningsenheder står bag verden første fuldt funktionsdygtige 8-bit microcontroller, der er fremstillet ved brug af organiske tyndfilmstransistorer (in english).

Imec, Holst Centre and the Katholieke Universiteit Leuven report the world-first functional 8-bit microprocessor made by organic thin-film transistors processed directly (i.e. without transfer) onto flexible plastic foil. These results pave the way to organic microprocessors in niche applications in which low-cost computing power is required, for example in smart packaging.

The organic 8-bit microprocessor features some 4,000 transistors with complex control logic and variable datapaths. It uses a robust dual-gate organic thin-film transistor (TFT) architecture with a back-gate on the transistors to control the threshold voltage (VT).

The complete microprocessor is composed of two 25µm thin foils that are connected 1-to-1: a microprocessor foil with 3,381 transistors (1.96x1.72cm2) and an instruction code foil comprising 612 transistors (0.72x0.64cm2).

This combination allowed to implement basic digital signal processing on foil, namely a running averager. When a stream of 6-bit, digital inputs is provided as input data, the running averager computes the weighed time-average of the input, which allows to increase the accuracy (to 7 bit) by filtering random noise. The microprocessor foil operates on supply voltages (VDD) between 10 and 20V at a clock frequency up to 6Hz. The power consumption of the microprocessor is typically 92µW at 10V supply voltage.

This work was performed in collaboration with Polymer Vision, one of the partners in the Holst Centre research programs, and was partially supported by the EU-Project COSMIC (IST-IP-247681).

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