Ferroelectric Recording Medium Lattice Matching for Dense Fast Storage
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Solution Overview
Problem
Conventional ferroelectric storage apparatuses face challenges in reading information at high speeds with high record density and struggle with energy consumption and probe manufacturing issues, limiting their ability to meet the demands of ultra-high-speed communication and storage requirements.
Innovation Solution
A ferroelectric storage apparatus is designed with a ferroelectric recording medium that includes a substrate, electrode layer, ferroelectric layer, and conductive probe, utilizing a conductive probe to read and write information with high precision and efficiency, and employing a method to invert polarization in the ferroelectric layer for multi-value recording.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional ferroelectric storage apparatuses are used, then basic recording functionality is achieved, but reading speed is limited and energy consumption increases
Solution Approach 1:
The patent changes the material parameters of the ferroelectric layer by selecting specific ferroelectric materials (such as Pb(Zr,Ti)O3, Pb(Mg3Nb2/3)O3-PbTiO3) and controlling their physical properties (film thickness, crystallinity, orientation) to optimize both reading speed and energy efficiency. This parameter optimization allows faster reading while reducing energy consumption compared to conventional approaches
2Quantity of substance
If high record density is achieved, then storage capacity increases, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by creating localized polarization regions in the ferroelectric layer with specific orientations (upward or downward polarization) to represent different data states. This allows high record density through multi-value recording while maintaining manufacturing feasibility by using controlled local polarization inversion rather than requiring ultra-precise manufacturing throughout the entire structure
3Ease of manufacture
If probe manufacturing is simplified, then ease of manufacture improves, but reading precision decreases
Solution Approach 1:
The patent replaces complex mechanical probe structures with a simplified conductive probe system that utilizes the ferroelectric layer's inherent polarization properties for reading. This substitution maintains reading precision by detecting polarization states through electrical field interactions rather than requiring mechanically complex probe structures
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 apparatus achieves high-speed reading and writing of information with high density and reduced energy consumption, addressing the limitations of existing technologies by enhancing crystallinity and lattice matching to improve recording density and reduce energy use.
Implementation Method 1
a ferroelectric recording medium that can repeatedly record information by changing the polarization of a ferroelectric
Implementation Method 2
moves the probe in a direction substantially orthogonal to the recording surface by using a piezoelectric material as movement means
Data Source
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AI summary
A ferroelectric recording medium includes an electrode layer, a ferroelectric recording layer, and a protection layer formed in this order on a substrate, wherein the ferroelectric recording layer includes a ferroelectric layer, and a lattice constant of a material constituting the ferroelectric layer and a lattice constant of a material constituting the electrode layer or the substrate are lattice-matched within a range of ±10%.