Graphene Synthesis Chamber With Optical Heating
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Solution Overview
Problem
The challenge of mass-producing large graphene sheets at low costs is hindered by the time-consuming process of setting up a high-temperature/high-vacuum environment in existing graphene synthesis methods.
Innovation Solution
A graphene synthesis chamber is designed with a main heating unit emitting near-infrared, mid-infrared, and visible wavelength light to rapidly heat the substrate, accompanied by auxiliary heating units to efficiently control temperature and minimize heating time, allowing for uniform heating and reduced synthesis time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional CVD method with high-temperature/high-vacuum environment is used to synthesize graphene, then graphene can be synthesized on metal thin film, but it takes relatively long time to set up the environment which hinders mass production
Solution Approach 1:
The patent replaces the conventional mechanical heating system with a laser-based optical heating system. The laser beam directly heats the metal thin film substrate without requiring the entire chamber to be heated to high temperatures, eliminating the need for time-consuming high-temperature environment setup while enabling rapid graphene synthesis for mass production
Solution Approach 2:
Instead of heating the entire chamber uniformly, the laser beam provides localized heating directly to the metal thin film substrate where graphene synthesis is needed. This localized energy input achieves the required high temperature at the substrate surface without requiring the whole chamber to be heated, significantly reducing setup time
2Temperature
If conventional heating methods are used to heat the substrate, then the substrate can be heated to synthesis temperature, but the heating process is slow and takes relatively long time
Solution Approach 1:
The patent replaces conventional mechanical heating methods with laser optical heating. The laser beam delivers concentrated optical energy directly to the substrate, converting optical energy to thermal energy rapidly and achieving synthesis temperature in a fraction of the time required by conventional heating methods
Solution Approach 2:
The laser heating system can be controlled to deliver periodic or continuous energy input to the substrate, allowing rapid temperature cycling and precise temperature control that achieves synthesis temperature much faster than conventional gradual heating methods
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 configuration enables rapid and uniform heating of the substrate, reducing the time needed to achieve synthesis temperatures and facilitating mass production of graphene while minimizing impurity deposition on chamber walls.
Implementation Method 1
a main heating unit which emits at least one light to the inner space to heat the substrate
Implementation Method 2
a main heating unit which emits at least one light to the inner space to heat the substrate
Implementation Method 3
a main heating unit which emits at least one light to the inner space to heat the substrate
Implementation Method 4
at least one auxiliary heating unit which absorbs the at least one light and emits radiant heat toward the substrate
Implementation Method 5
at least one auxiliary heating unit which absorbs the at least one light and emits radiant heat toward the substrate
Data Source
AI summary
A graphene synthesis chamber includes: a chamber case in which a substrate including a metal thin film is placed; a gas supply unit which supplies at least one gas comprising a carbon gas into an inner space of the chamber case; a main heating unit which emits at least one light to the inner space to heat the substrate; and at least one auxiliary heating unit which absorbs the at least one light and emits radiant heat toward the substrate.