2D Material Memory Device Local Domain Control
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Solution Overview
Problem
Current methods for controlling the properties of two-dimensional materials are limited to changing phases or generating domains over the entire material, lacking the ability to precisely control local areas.
Innovation Solution
A memory device is developed using a two-dimensional material layer with a contact region and electrodes to apply voltage, allowing for the change of domains in adjacent regions, creating regions with different atomic alignment directions and properties, such as electrical, optical, or thermal properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If voltage is applied to the entire two-dimensional material layer, then phase change or domain generation occurs over the whole material, but precise local area control is not achieved
Solution Approach 1:
The patent divides the two-dimensional material layer into multiple regions with different domains by applying voltage to specific local areas through segmented electrode structures. The contact region is divided into multiple contact portions, each corresponding to a different crystal orientation, allowing independent domain generation in different regions of the material layer.
Solution Approach 2:
The patent creates different domains with specific crystal orientations in different local regions of the two-dimensional material layer by applying voltage through contact regions with different crystal orientations. This allows each region to have tailored properties (electrical, optical, thermal, magnetic) according to the desired domain configuration.
2Adaptability or versatility
If contact region is divided into multiple contact portions with different crystal orientations, then different domains are generated in different regions, but fabrication complexity increases
Solution Approach 1:
The patent changes the crystal orientation parameter of the contact region to generate different domains. By controlling the crystal orientation of the contact region (e.g., <100>, <110>, <111> directions), different domains with specific properties can be generated in the two-dimensional material layer without changing the material composition or structure.
3Manufacturing precision
If multiple electrodes are used to control different domains, then local area property control is achieved, but device structure becomes more complex
Solution Approach 1:
The patent makes the contact region multi-functional by giving it both electrical contact function and domain control function. The contact region serves as both the electrical contact point and the means to generate specific domains through its crystal orientation, eliminating the need for separate domain control 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
Enables precise control over local areas of two-dimensional materials, creating regions with distinct properties, enhancing the functionality of two-dimensional material-based devices.
Implementation Method 1
the properties of the two-dimensional material include phase change, domain generation, grain boundary structure
Implementation Method 2
the properties of the two-dimensional material include phase change, domain generation, grain boundary structure
Data Source
AI summary
Provided is a memory device and an electronic device including the same. The memory device according to an example embodiment may include: a two-dimensional material layer including a two-dimensional material; a contact region in contact with an edge of the two-dimensional material layer; and an electrode which is electrically connected to the contact region and changes a domain of a region adjacent to the contact region of the two-dimensional material layer by an applied voltage.