Cyclic Doping of 2D Transfer Films for Uniform Thick-Layer Doping
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Solution Overview
Problem
Conventional doping processes, such as ion implantation, cause damage to two-dimensional materials and struggle to achieve uniform doping throughout the material's thickness, especially when the thickness exceeds a monolayer, limiting their application in next-generation electronic devices.
Innovation Solution
A cyclic doping process involving the formation of unit transfer thin films on a transfer substrate, low-damage doping using methods like reactive radical adsorption or spin coating, transferring the doped films, and repeating these steps to achieve target thickness with surface treatment to prevent interface issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ion implantation is used for doping, then doping efficiency is improved, but damage to the two-dimensional material occurs
Solution Approach 1:
The patent introduces a transfer substrate as an intermediary between the doping source and the two-dimensional material. The transfer substrate receives the dopant ions first, then transfers them to the two-dimensional material in a controlled manner, reducing direct impact damage while maintaining doping efficiency
Solution Approach 2:
The patent replaces the direct mechanical ion implantation process with a two-stage process involving transfer substrate mediation, substituting the harmful high-energy direct impact with a gentler transfer mechanism that preserves material integrity
2Object-affected harmful factors
If surface treatment processes are used for doping, then damage to the material is minimized, but uniform doping inside the material is not achieved
Solution Approach 1:
The patent segments the doping process into multiple stages: initial doping on the transfer substrate, then transferring to the two-dimensional material. This segmentation allows the doping to occur in controlled steps, achieving both gentle treatment and uniform distribution throughout the material thickness
Solution Approach 2:
The patent utilizes the transfer substrate as an additional dimensional platform, performing doping in this intermediate dimension before transferring to the final two-dimensional material. This dimensional approach enables uniform dopant distribution across the material thickness without direct high-energy impact
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
This method enables uniform doping characteristics within two-dimensional materials without causing damage, ensuring stable electrical and optical properties across the material's thickness, even at monolayer or more thicknesses, and improves the performance of electronic devices by controlling doping uniformly.
Implementation Method 1
doping of the two-dimensional material is performed in a manner that minimizes damage to the material through surface treatment processes, and representatively, research on reactive radical adsorption using plasma
Implementation Method 2
spin coating using a solution
Implementation Method 3
an operation of transferring the unit transfer thin film doped according to the operation ii) on a transfer target substrate
Data Source
AI summary
One embodiment of the present invention provides a method of manufacturing an electronic device using a cyclic doping process including i) an operation of forming a unit transfer thin film including a two-dimensional material on a transfer substrate, ii) an operation of doping the unit transfer thin film in a low-damage doping process, iii) an operation of transferring the unit transfer thin film doped according to the operation ii) on a transfer target substrate, and iv) an operation of repeatedly performing the operations i) to iii) several times to reach a target thickness.