Here comes electrolytic memory

Nov. 3, 2005
The 2005 IEEE International Electron Devices Meeting to be held Dec. 5-7 in Washington, D.C., showcases applied electronics research from labs worldwide. Memory is just one of the many topics to be presented at this 51st annual meeting. Here is a sneak peek:

Electrolytes are generally thought of as molten or liquid substances that conduct electricity. Solid electrolytes are also possible and have a property that makes them useful for memory devices: the conducting and nonconducting states are nonvolatile. Creating or dissolving conduction paths in a solid electrolyte that bridge a memory cell's source and drain electrodes could build a nonvolatile memory. But high operating voltages and currents are needed if the controlling gate lies in the conduction path.

A novel nanoscale three-terminal device from NEC researchers gets around the problem. The solid electrolyte consists of a 40-nm spin-coated layer of Cu2S; the source and gate electrodes are copper; and the drain electrode is made from platinum. Applying a positive voltage to the gate causes both the gate and source electrode to inject positive copper ions into the electrolyte. When that happens, a copper bridge grows within the electrolyte and electrically connects the source and drain. The bridge disappears when a negative voltage is applied. More work needs to be done to improve cycling endurance and to reduce switching speeds at lower voltages, but the work is a promising first step.

Sponsored Recommendations

How BASF turns data into savings

May 7, 2024
BASF continuously monitors the health of 63 substation assets — with Schneider’s Service Bureau and EcoStruxure™ Asset Advisor. ►Learn More: https://www.schn...

Agile design thinking: A key to operation-level digital transformation acceleration

May 7, 2024
Digital transformation, aided by agile design thinking, can reduce obstacles to change. Learn about 3 steps that can guide success.

Can new digital medium voltage circuit breakers help facilities reduce their carbon footprint?

May 7, 2024
Find out how facility managers can easily monitor energy usage to create a sustainable, decarbonized environment using digital MV circuit breakers.

The Digital Thread: End-to-End Data-Driven Manufacturing

May 1, 2024
Creating a Digital Thread by harnessing end-to-end manufacturing data is providing unprecedented opportunities to create efficiencies in the world of manufacturing.

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!