Ferroelectric Memory Cell Low-Voltage Resistive Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current non-volatile semiconductor memory devices, such as flash memory, require high voltage for data writing and have limitations in low-power and fast-response applications, especially in consumer, defense, and medical instrumentation.
Innovation Solution
A memory device utilizing a structure with a first semiconductor material, a resistive ferroelectric material, and a second semiconductor material, where the ferroelectric material's polarization direction is switched using voltage pulses to change resistance states, allowing for low-voltage data writing and reading, and also functions as an energy storage device by storing and releasing energy through polarity changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If flash memory structure with floating gate is used, then data storage capability is achieved, but high voltage is required for writing and power consumption increases
Solution Approach 1:
The patent changes the fundamental operating parameters by using ferroelectric materials with spontaneous polarization that can be switched at low voltages. The resistive switching mechanism in the ferroelectric material allows data storage without requiring high voltage programming pulses, directly reducing power consumption while maintaining data storage reliability through the non-volatile nature of the resistive states.
Solution Approach 2:
The patent employs a composite structure combining ferroelectric material with resistive switching properties and semiconductor materials. This composite approach leverages the polarization switching of the ferroelectric material to control resistance states, achieving both low-power operation and reliable data storage without the high voltage requirements of traditional floating gate structures.
2Speed
If traditional memory structures are used, then data storage is achieved, but response speed is limited
Solution Approach 1:
The patent extracts and eliminates the complex floating gate structure and control gate architecture from traditional flash memory. By using a simpler ferroelectric-based resistive switching structure, the patent achieves faster response speeds while reducing structural complexity, removing unnecessary components that limited speed in conventional designs.
3Ease of operation
If ferroelectric material with switchable polarization is used, then low voltage operation is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The patent optimizes the ferroelectric layer thickness parameter to balance manufacturing feasibility with performance. By selecting appropriate thickness ranges that accommodate standard manufacturing tolerances while maintaining the spontaneous polarization and resistive switching properties, the patent achieves low-voltage operation without imposing excessive precision requirements on the manufacturing process.
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
Enables low-power, fast-response data storage and retrieval with reduced voltage requirements, and efficient energy storage and release, suitable for dense three-dimensional arrays, enhancing memory capacity and power efficiency.
Implementation Method 1
a resistive ferroelectric material having a switchable spontaneous polarization
Implementation Method 2
The memory cell can have different resistances in the first and second states
Implementation Method 3
The first semiconductor material can include a piezoelectric material
Data Source
AI summary
A memory device is provided. The memory device includes a plurality of memory cells and a controller to write data to and read data from the memory cells. Each memory cell includes a first semiconductor material having a spontaneous polarization, a resistive ferroelectric material having a switchable spontaneous polarization, and a second semiconductor material having a spontaneous polarization, the resistive ferroelectric material being positioned between and in contact with the first and second semiconductor materials. The memory device can be configured to store energy that can be released by applying a voltage pulse to the memory device.