Microwave Heating of Transition-Metal Chalcogenide Thin Films

Solution Overview

Problem

The manufacturing process of single-layer transition-metal chalcogenide thin films is hindered by high heating costs and prolonged processing times due to the need for extensive heating during the manufacturing process.

Innovation Solution

A method involving a substrate with dipole moments, a reaction film with a transition-metal compound, and a source of S, Se, or Te, where a microwave is used to heat the substrate directly, facilitating a chemical reaction and forming a two-dimensional transition-metal chalcogenide thin film, thereby reducing heating costs and processing time.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional heating methods are used to manufacture single-layer transition-metal chalcogenide, then the chemical reaction can proceed to form the thin film, but the heating cost increases and the processing time becomes longer

Engineering Contradiction:

Improvethin film formationVSAvoidprocessing time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent replaces conventional thermal field heating (mechanical/thermal system) with microwave field heating (electromagnetic system). The microwave heating system directly couples electromagnetic energy to the reaction film and source material, enabling faster and more efficient heating compared to conventional thermal conduction or convection methods, thus reducing processing time while maintaining thin film formation quality

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the heating parameter from conventional thermal field to microwave field. By using microwave radiation at specific frequencies, the heating efficiency is dramatically improved, allowing the chemical reaction to proceed rapidly at lower overall energy input, thereby reducing both processing time and heating cost while achieving the desired thin film structure

Inventive Principle:

Principle #35Parameter changes

2Manufacturing precision

If conventional heating methods are used to manufacture single-layer transition-metal chalcogenide, then the chemical reaction can proceed to form the thin film, but the heating cost increases

Engineering Contradiction:

Improvethin film formationVSAvoidheating cost

Core Design Contradiction:

Manufacturing precisionVSUse of energy by stationary object

Solution Approach 1:

The patent replaces conventional thermal field heating (mechanical/thermal system) with microwave field heating (electromagnetic system). The microwave heating system directly couples electromagnetic energy to the reaction film and source material, enabling faster and more efficient heating compared to conventional thermal conduction or convection methods, thus reducing processing time while maintaining thin film formation quality

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the heating parameter from conventional thermal field to microwave field. By using microwave radiation at specific frequencies, the heating efficiency is dramatically improved, allowing the chemical reaction to proceed rapidly at lower overall energy input, thereby reducing both processing time and heating cost while achieving the desired thin film structure

Inventive Principle:

Principle #35Parameter changes

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 approach allows for quicker substrate heating, shorter reaction times, and alignment of elements along a predefined direction, enhancing the performance and reducing the manufacturing costs of the two-dimensional transition-metal chalcogenide thin films.

Implementation Method 1

A microwave is provided, wherein the substrate is heated by the microwave to produce a heat energy to the reaction film and the source

Methodology Applied

Scientific EffectMicrowave heating: Dielectric Heating

Data Source

PatentUS9460919B1Manufacturing method of two-dimensional transition-metal chalcogenide thin film

Publication Date: 2016.10.04 NATIONAL TSING HUA UNIVERSITY

AI summary

A manufacturing method of a two-dimensional transition-metal chalcogenide thin film includes providing a substrate, providing a reaction film, providing a source and providing a microwave. The substrate is made of material having dipole moments. The reaction film, disposed on the substrate, has a predefined thickness and includes a transition-metal compound. The source includes S, Se, or Te. The substrate is heated by the microwave to produce a heat energy to the reaction film and the source; thus a chemical reaction takes place and the two-dimensional transition-metal chalcogenide thin film is formed on the substrate. The two-dimensional transition-metal thin film includes a plurality of elements, and each of the elements aligns along a predefined direction by controlling a value of the predefined thickness.