MoS2 Ferroelectric Structure for Single-Device True Random Number Generation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current random number generators, particularly CMOS-based pseudo random number generators, are complex and limited in their ability to generate true random numbers, making them vulnerable to hacking and unsuitable for the growing demands of the IoT industry.
Innovation Solution
A ferroelectric structure is developed, comprising a substrate, a lower electrode, a ferroelectric layer made of molybdenum disulfide (MoS2), and an upper electrode. This structure generates current values of random intensity when the same voltage is applied, enabling the implementation of a true random number generator as a single device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CMOS-based pseudo random number generator is used, then random number generation is achieved, but the device complexity increases and reliability decreases due to vulnerability to hacking
Solution Approach 1:
The patent extracts the random number generation function from complex CMOS circuit implementations and implements it using a simple ferroelectric device structure. By taking out the random number generation capability and implementing it through the inherent physical properties of ferroelectric materials (specifically the stochastic switching behavior of polarization states), the system achieves true random number generation without requiring complex circuit architectures or algorithms.
Solution Approach 2:
The ferroelectric device generates true random numbers through its own inherent physical properties - the stochastic switching between polarization states. This self-service mechanism eliminates the need for external complex algorithms or additional security components, as the device naturally produces unpredictable random values through its material characteristics and switching behavior.
2Reliability
If ferroelectric layer is integrated between electrodes, then true random number generation is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The patent utilizes changes in physical parameters of the ferroelectric layer - specifically the stochastic switching between positive and negative polarization states - to generate random numbers. By focusing on the binary state transitions rather than precise analog values, the system tolerates manufacturing variations while maintaining reliable random number generation capability.
Solution Approach 2:
The invention exploits the phase transition or state switching behavior of ferroelectric materials between different polarization states. This phase transition approach converts manufacturing precision challenges into opportunities, as the discrete switching events between stable polarization states naturally provide robust random number generation even with material variations.
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 ferroelectric structure achieves ideal random number generation performance, making it suitable for data encryption, encryption key generation, and simulation data generation, while also being applicable to solar cells and non-volatile RF switches.
Implementation Method 1
a ferroelectric layer disposed on the lower electrode and including a two-dimensional ferroelectric material... in which a current value of random intensity is obtained for a same voltage being applied
Data Source
AI summary
Provided is a ferroelectric structure. The ferroelectric structure includes: a substrate; a lower electrode disposed on the substrate; a ferroelectric layer disposed on the lower electrode including a two-dimensional ferroelectric material; and an upper electrode disposed on the ferroelectric layer, in which a current value of random intensity is obtained for the same voltage being applied.