Piezoelectric Memory Using Hydrogen Reservoir Strain Readout
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current non-volatile memory technologies face challenges in energy efficiency and compatibility with semiconductor fabrication processes, particularly in retaining data without continuous power supply and in achieving multilevel memory functionality.
Innovation Solution
A non-volatile memory apparatus utilizing a piezoelectric layer with hydrogen reservoirs and a dielectric layer, where hydrogen is moved between reservoirs using an electric field to induce strain on the piezoelectric layer, allowing for low energy dissipation and multilevel memory capabilities, and employing materials compatible with semiconductor fabrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If conventional non-volatile memory technologies are used, then data retention without power is achieved, but continuous power supply or frequent refreshes are required for volatile memory operation
Solution Approach 1:
The patent replaces electrical field-based memory mechanisms with a mechanical strain-based system. The piezoelectric layer converts mechanical strain from hydrogen reservoir volume changes into electrical signals for reading data, eliminating the need for continuous power supply while maintaining non-volatile operation.
Solution Approach 2:
The patent extracts the power consumption issue by completely decoupling the readout mechanism from the power supply. The readout circuit is electrically isolated from the memory element, using only mechanical strain transfer through the piezoelectric layer to read data without any power input during read operations.
2Ease of operation
If electrically coupled memory elements are used, then readout is simplified, but energy dissipation during reading increases
Solution Approach 1:
The piezoelectric layer serves as an intermediary between the hydrogen reservoirs and the readout circuit. It mechanically couples the hydrogen volume changes to the readout electrodes without electrical coupling, enabling simple readout while preventing energy dissipation through electrical connection.
Solution Approach 2:
The patent segments the memory system into electrically isolated components: hydrogen reservoirs for data storage, piezoelectric layer for signal transduction, and readout circuit for data retrieval. This segmentation allows each component to perform its function independently without energy loss through electrical coupling.
3Loss of energy
If complex materials or fabrication processes are used to achieve low energy dissipation and electrical decoupling, then performance improves, but manufacturing complexity increases
Solution Approach 1:
The patent achieves low energy dissipation and electrical decoupling by changing the fundamental operating parameter from electrical field interaction to mechanical strain interaction. This parameter change allows the use of standard piezoelectric materials and conventional semiconductor fabrication processes, maintaining ease of manufacture while achieving the desired performance.
Solution Approach 2:
The memory element uses a composite structure combining hydrogen reservoir materials, dielectric layers, and piezoelectric materials. This composite approach leverages the properties of well-known materials that are compatible with existing semiconductor fabrication processes, avoiding the need for complex or exotic materials.
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 a memory element with low energy dissipation, decoupling from readout devices, and the ability to create multilevel memory elements, maintaining data retention for extended periods using well-known semiconductor-compatible materials.
Implementation Method 1
a piezoelectric layer that is adjacent to the side of the second hydrogen reservoir and that has a side that is opposite from the second hydrogen reservoir
Implementation Method 2
a dielectric layer that has a first side that is adjacent to the first hydrogen reservoir and a second side that is opposite from the first hydrogen reservoir
Data Source
AI summary
A non-volatile memory apparatus includes a first hydrogen reservoir, which is electrically conductive; a charge of hydrogen, which is captured in the first hydrogen reservoir; a dielectric layer that has a first side that is adjacent to the first hydrogen reservoir and a second side that is opposite from the first hydrogen reservoir; a second hydrogen reservoir that is adjacent to the second side of the dielectric layer, is electrically conductive, and has a side that is opposite from the dielectric layer; and a piezoelectric layer that is adjacent to the side of the second hydrogen reservoir and that has a side that is opposite from the second hydrogen reservoir.