Correlated Electron Material Devices for Rapid Switching
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Solution Overview
Problem
Current technologies face challenges in fabricating correlated electron devices that exhibit desirable impedance characteristics, such as rapid conductor/insulator transitions, which are essential for advanced memory and logic devices, as they often rely on solid state structural phase changes rather than quantum mechanical phenomena, limiting their speed and power efficiency.
Innovation Solution
The development of methods for preparing correlated electron materials (CEMs) that utilize quantum mechanical transitions, specifically Mott transitions, to switch between conductive and insulative states, allowing for variable impedance characteristics through the use of transition metal oxides and rare earth oxides, enabling rapid and reversible changes in resistance and capacitance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If solid state structural phase changes are used for switching, then device fabrication is achieved, but switching speed and power efficiency are limited
Solution Approach 1:
The patent changes the fundamental operating parameter from solid state structural phase changes to quantum mechanical Mott transitions. This parameter change enables rapid switching between conductive and insulative states by exploiting electron correlation effects and band structure changes, achieving both high speed and low power consumption simultaneously
Solution Approach 2:
The patent replaces the mechanical solid state structural phase change mechanism with a quantum mechanical Mott transition mechanism. This substitution eliminates the need for large atomic displacements and structural rearrangements, enabling faster switching with lower energy requirements by utilizing electron correlation effects instead of mechanical lattice transformations
2Speed
If quantum mechanical Mott transitions are used, then switching speed and power efficiency improve, but manufacturing complexity increases
Solution Approach 1:
The patent employs composite material structures combining transition metal oxides (exhibiting Mott transition behavior) with other functional materials. This composite approach enables the complex quantum mechanical switching behavior to be achieved through material composition and interface engineering rather than requiring complex device architectures, thereby improving manufacturability
Solution Approach 2:
The patent applies local quality by creating spatially varying material compositions and structures within the device. Different regions are engineered with specific material properties to facilitate Mott transitions at desired locations, allowing complex quantum mechanical behavior to be achieved through localized material design rather than uniform complex structures
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables the creation of CEM devices that can switch between low- and high-impedance states efficiently, offering improved speed and lower power consumption, making them suitable for next-generation memory and logic devices.
Implementation Method 1
utilize quantum mechanical transitions, specifically Mott transitions, to switch between conductive and insulative states
Implementation Method 2
enabling rapid and reversible changes in resistance and capacitance
Data Source
AI summary
Subject matter disclosed herein may relate to fabrication of correlated electron materials used, for example, to perform a switching function. In embodiments, precursors, in a gaseous form, may be utilized in a chamber to build a film of correlated electron materials comprising various impedance characteristics.