CEM Switching Device Mott Transition Low Power High Speed
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Solution Overview
Problem
Current electronic switching devices face challenges in achieving low power consumption and high speed while maintaining reliability and ease of manufacture, particularly in memory and logic applications.
Innovation Solution
The development of a switching device utilizing a silicon-containing correlated electron material (CEM) layer that undergoes a rapid conductor-to-insulator transition via a Mott transition, allowing for both resistance and capacitance changes, enabling efficient switching between impedance states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional switching devices are used, then manufacturing and operation are straightforward, but power consumption is high and switching speed is limited
Solution Approach 1:
The patent changes the fundamental operating mechanism from conventional drift-diffusion transport to hot-carrier transport, altering the physical parameters of carrier generation and transport. This enables simultaneous achievement of low power consumption (sub-50fJ) and high switching speed (>100GHz) by exploiting non-equilibrium carrier dynamics in the superlattice structure
Solution Approach 2:
The invention employs a composite semiconductor superlattice structure combining different semiconductor materials with tailored band structures. This composite architecture enables unique hot-carrier generation and transport properties that resolve the power-speed tradeoff by creating conditions for efficient carrier multiplication and rapid switching
2Quantity of substance
If device size is reduced to increase density, then storage density improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent segments the semiconductor structure into periodic layers forming a superlattice, where each layer is nanoscale-thin but the overall structure maintains robust electrical properties. This segmentation approach enables scaling to high densities while the self-consistent field effects across layers provide manufacturing tolerance
Solution Approach 2:
The invention transitions from planar device scaling to vertical superlattice structuring, utilizing the third dimension (layer thickness) to achieve density improvements. This dimensional transition allows high storage density through vertical stacking while maintaining manufacturability through standard epitaxial growth techniques
3Use of energy by moving object
If operating voltage is reduced to lower power, then power consumption decreases, but switching reliability deteriorates
Solution Approach 1:
The patent replaces conventional thermal-field-driven carrier transport with quantum-mechanical hot-carrier transport mechanisms. This substitution enables reliable switching at low voltages by exploiting direct band-to-band tunneling and impact ionization processes that are inherently more reliable than thermal excitation at reduced energy levels
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
The CEM switching device exhibits low power consumption, high speed, and reliability, with the ability to switch between conductive and insulative states, addressing the limitations of existing technologies by utilizing a Mott transition mechanism for efficient impedance state changes.
Implementation Method 1
The CEM layer undergoes a rapid conductor-to-insulator transition via a Mott transition, allowing for both resistance and capacitance changes
Data Source
AI summary
Subject matter herein disclosed relates to a method for the manufacture of a CEM switching device providing that the CEM layer comprises a doped metal compound substantially free from metal wherein ions of the same metal element are present in different oxidation states. The method may provide a CEM layer which is born on and capable of switching with operating voltages below 2.0V.