Electrochemical device

Abstract

An electrochemical device is provided, comprising a source contact connected to a first antenna pad, a drain contact connected to a second antenna pad, at least one gate electrode, an electrochemically active element arranged between, and in direct electrical contact with, the source and drain contacts, which electrochemically active element comprises a transistor channel and is of a material comprising an organic material having the ability of electrochemically altering its conductivity through change of redox state thereof, and a solidified electrolyte in direct electrical contact with the electrochemically active element and the at least one gate electrode and interposed between them in such a way that electron flow between the electrochemically active element and the gate electrode(s) is prevented. In the device, flow of electrons between source contact and drain contact is controllable by means of a voltage applied to the gate electrode(s).

Description

PRIORITY STATEMENT[0001]This is a continuation of U.S. application Ser. No. 10 / 495,653, filed Aug. 18, 2004, the entire contents of which are hereby incorporated by reference. This application claims the benefit of PCT Application No. PCT / SE02 / 0221, filed Nov. 29, 2002, the entire contents of which are hereby incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention relates to radio frequency identification tags, and in particular to a radio frequency identification tag that is modulated by an electrochemical device. In particular, the present invention relates to printable, electrostatic antennas together with printable electrochemical transistor devices, based on conducting organic and / or inorganic materials.BACKGROUND OF THE INVENTION[0003]Remotely read identification tags have a wide range of different applications and uses (see for example RFID HANDBOOK “Radio-Frequency Identification Fundamentals and Applications” by Klaus Finkenzeller, John Wiley & So...

AI Technical Summary

Benefits of technology

"The present invention provides a new type of capacitively coupled identification device with an active antenna logic connection that can be deposited on a wide range of rigid or flexible substrates using printing methods. The device has superior handling and disposal characteristics compared to previous devices. It can be produced using conventional printing methods and is environmentally safe. The invention also allows for the modification of electron flow between source and drain contacts, which can be controlled through the application of a voltage to the gate electrode(s). The device can be used in various applications, such as RF-ID tags and transponders."

Problems solved by technology

Problems with capacitively coupled identification devices in the prior art include that they are difficult and expensive (>0.50 USD) to manufacture.

In particular, the chip part of the identification unit is limiting the capability to mass-produce the tags to lower prices.

Furthermore, materials used in the chips of prior art devices suffer from a lack of environmental friendliness, processability and economic production possibilities.

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