Hybrid Superconducting Resistive Memory Device
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Solution Overview
Problem
Current memory devices operating at cryogenic temperatures face challenges in achieving fast switching energy, scalability, and compatibility with superconducting flux quantum electronics, while existing solutions often require complex architectures and high energy consumption.
Innovation Solution
A hybrid memory device combining a switchable resistive element with a superconductor element, where the superconductor element is switched from a superconducting to a non-superconducting state to control the resistive element's switching between two electrical resistivity values, enabling efficient current injection and low-energy operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a superconducting nanowire memory element is used, then fast switching speed is achieved, but high switching energy and complexity are introduced
Solution Approach 1:
The patent combines a superconducting nanowire element with a resistive switching element into a hybrid memory device. The superconducting element provides fast switching speed through its rapid transition between superconducting and resistive states, while the resistive switching element maintains low energy consumption through its stable resistance states. This merging allows the device to achieve both fast switching and low energy operation simultaneously.
Solution Approach 2:
The memory device uses a composite structure integrating superconducting materials (for fast switching) and resistive materials (for low energy consumption). The superconducting nanowire is fabricated in conjunction with a resistive switching layer, creating a composite device that leverages the complementary advantages of both material types to resolve the contradiction between speed and energy efficiency.
2Speed
If complex superconducting memory architectures are implemented, then fast switching is achieved, but scalability and ease of manufacture are reduced
Solution Approach 1:
The memory device is segmented into distinct functional layers: a superconducting nanowire layer for fast switching and a resistive switching layer for stable state maintenance. This segmentation allows each component to be optimized independently and facilitates modular fabrication processes, improving scalability while maintaining fast switching performance.
Solution Approach 2:
The hybrid structure serves multiple functions within a single device architecture: the superconducting element provides fast switching, the resistive element provides stable memory states, and their combination enables both volatile and non-volatile memory operation. This multi-functionality reduces the need for separate components, simplifying manufacturing and improving scalability.
3Adaptability or versatility
If cryogenic memory devices are operated, then compatibility with superconducting electronics is achieved, but high energy consumption and operational complexity are introduced
Solution Approach 1:
The device operates by changing the temperature parameter to transition the superconducting element between superconducting and resistive states. This parameter change enables control of the switching behavior without requiring high energy input, as the phase transition occurs naturally at the critical temperature. The resistive switching element further modulates the energy consumption by providing stable resistance states that maintain memory information with minimal energy.
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 solution provides ultrafast switching speeds, scalability, low switching energy, and compatibility with superconducting electronics, allowing for efficient data storage with binary values, suitable for both volatile and non-volatile memory applications.
Implementation Method 1
a superconductor element connected electrically in parallel with the switchable resistive element, the superconductor element being operable so that at least part of the superconductor element is switchable from a superconducting state to a non-superconducting state
Implementation Method 2
a switchable resistive element comprising an active material, the active material being switchable, by current injection, between first and second values of electrical resistivity ρ1 and ρ2 at the same temperature
Data Source
AI summary
The invention describes a memory device which combines a switchable resistive element and a superconductor element electrically in parallel. The switchable resistive element comprises an active material, which is switchable between first and second values of electrical resistivity ρ1 and ρ2 at the same temperature, wherein ρ1 is different to ρ2. The superconductor element is operable so that at least part of the superconductor element is switchable from a superconducting state to a non-superconducting state. When the superconductor element is switched from the superconducting state to the non-superconducting state, a current injection is provided through the switchable resistive element capable of switching the switchable resistive element between said first and second values of electrical resistivity.