Fluorite Thin Film Domain Structure for Faster Polarization Switching

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Fluorite-based materials exhibit low polarization switching rates due to high energy barriers during polarization switching, which hampers the operational speed of semiconductor devices.

Innovation Solution

A fluorite-based material thin film with an orthorhombic crystal structure featuring symmetric and non-symmetric segments, allowing for polarization direction change through structural transitions between these segments, and domain wall propagation with reduced energy barriers, utilizing a specific atomic arrangement represented by U-Sx-D, where S is the symmetric segment and U and D are domains with different polarization directions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If fluorite-based materials are used for semiconductor devices, then device integration and miniaturization are enabled, but polarization switching rate is reduced due to high energy barriers

Engineering Contradiction:

Improvedevice sizeVSAvoidpolarization switching rate

Core Design Contradiction:

Volume of moving objectVSSpeed

Solution Approach 1:

The fluorite-based material thin film is segmented into multiple domains with different polarization directions, separated by domain walls. This segmentation allows localized polarization switching to propagate through the material via domain wall movement, enabling faster overall switching behavior compared to uniform material switching

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The crystal structure parameters are optimized by controlling the orthorhombic phase formation and adjusting lattice constants through composition control (Hf, Zr ratios). This parameter optimization reduces the energy barrier for polarization switching while maintaining the fluorite-based material's compatibility with semiconductor fabrication processes

Inventive Principle:

Principle #35Parameter changes

2Stability of the object's composition

If high energy barriers exist during polarization switching, then material stability is maintained, but operation speed of semiconductor devices is hindered

Engineering Contradiction:

Improvematerial stabilityVSAvoidoperation speed

Core Design Contradiction:

Stability of the object's compositionVSProductivity

Solution Approach 1:

The material utilizes phase transition between different orthorhombic crystal structures during polarization switching. By engineering the phase transition characteristics through composition control and thin film structure design, the energy barrier is reduced to enable faster switching while the material maintains stability in its operational state

Inventive Principle:

Principle #36Phase transitions

Solution Approach 2:

The fluorite-based material is designed as a composite system combining Hf and Zr oxides in specific ratios, creating a composite structure that balances stability and switching speed. The composite nature allows optimization of both the energy barrier (for speed) and the overall material stability simultaneously

Inventive Principle:

Principle #40Composite 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 semiconductor device achieves improved polarization switching rates, reducing the total switching time to less than 1.0×10−7 sec and peak polarization switching times to 5.0×10−7 sec or less, enhancing the operational efficiency of semiconductor devices.

Implementation Method 1

a fluorite-based material thin film having an orthorhombic crystal structure having a symmetric segment and a non-symmetric segment, and at least two domains having different polarization directions

Methodology Applied

Scientific EffectFerroelectric effect:

Implementation Method 2

The polarization direction may be configured to be changed through structural transition between the symmetric segment and the non-symmetric segment while a structural transition of at least one of the symmetric segment to the non-symmetric segment or a structural transition of the non-symmetric segment to the symmetric segment occurs according to a direction in which an electric field is applied from the outside

Methodology Applied

Scientific EffectPiezoelectric effect: Piezoelectric Effect

Data Source

PatentUS12617695B2Fluorite-based material thin film and semiconductor device comprising the same

Publication Date: 2026.05.05 SAMSUNG ELECTRONICS CO LTD

AI summary

Provided is a fluorite-based material thin film including an orthorhombic crystal structure having a symmetric segment and a non-symmetric segment; and at least two domains having different polarization directions. At least one of, the symmetric segment is not present at a wall between the domains, or at least two symmetric segments are consecutive. Also provided is a semiconductor device including the fluorite-based material thin film having an orthorhombic crystal structure. A polarization direction of the fluorite-based material thin film is configured to be changed by a structural transition between the symmetric segment and the non-symmetric segment.