Correlated Electron Material Devices with Reduced Interfacial Impedance
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Solution Overview
Problem
Current integrated circuit devices, such as electronic switching devices, face challenges in achieving lower power consumption and higher speed while maintaining desirable impedance characteristics, particularly in memory and logic devices, due to issues with interfacial layer impedance and oxidation resistance.
Innovation Solution
The use of correlated electron materials (CEMs) with interfacial layers having reduced impedance, achieved through techniques like atomic layer deposition and nitrogen-rich environments to inhibit oxidation, allowing for efficient switching between conductive and insulative states without the need for filament formation, thereby preserving the 'born on' property of low impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fabrication methods are used, then manufacturing process is simple, but interfacial layer impedance is high and oxidation resistance is poor
Solution Approach 1:
The patent applies preliminary action by performing nitrogen-rich environment annealing on the conductive substrate before depositing the correlated electron material. This pre-treatment modifies the substrate surface to inhibit oxidation during subsequent fabrication steps, thereby improving oxidation resistance without adding complex post-processing steps. The nitrogen diffusion into the substrate creates a protective environment that prevents oxygen exposure during material deposition.
Solution Approach 2:
The patent employs an inert atmosphere approach by using a nitrogen-rich environment during the annealing process. Nitrogen acts as a protective atmosphere that prevents oxidation of the conductive substrate and interfacial layers. This inert environment maintains low impedance at the interfaces while avoiding the formation of resistive oxide layers, thereby improving reliability without requiring vacuum or other complex protective atmospheres.
2Use of energy by moving object
If high impedance interfacial layers are present, then device structure is simpler, but switching voltage is high and power consumption is high
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition and electrical properties of the interfacial layers through nitrogen-rich annealing. This treatment changes the impedance parameter of the interfaces from high to low, enabling efficient charge transfer between the conductive substrate and correlated electron material. The reduced interfacial impedance directly lowers the switching voltage required, thereby reducing power consumption while maintaining simple device structure.
3Reliability
If oxidation occurs at interfacial layers, then manufacturing process is simpler, but impedance increases and conductivity decreases
Solution Approach 1:
The patent uses a nitrogen-rich inert atmosphere during annealing to prevent oxidation at the interfacial layers. This protective atmosphere inhibits oxygen exposure to the conductive substrate and correlated electron material interfaces, maintaining low impedance and high conductivity. The approach preserves manufacturing simplicity by using a single-step annealing process that simultaneously achieves oxidation protection and material activation without requiring additional deposition or coating steps.
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 CEM devices to operate with significantly reduced switching voltages, enhancing performance, reducing complexity and cost, and maintaining high conductivity, thus addressing the limitations of existing technologies in power consumption and speed.
Implementation Method 1
nitrogen-rich environments to inhibit oxidation
Implementation Method 2
techniques like atomic layer deposition
Implementation Method 3
correlated electron materials (CEMs) with interfacial layers having reduced impedance
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, processes are described, which may be useful in avoiding formation of a potentially resistive oxide layer at an interfacial surface between a conductive substrate, for example, and a correlated electron material.