Gallium Oxide Mist CVD Heating Window for Faster Film Growth
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Solution Overview
Problem
The mist CVD method experiences a significant degradation in film forming speed when using gallium chloride or hydrochloric acid as raw materials, compared to other materials like gallium acetylacetonate or gallium bromide.
Innovation Solution
A method is developed where a mist generated by atomizing a raw-material solution containing chloride ions and gallium ions is conveyed using a carrier gas, heated for 0.002 seconds or more and 6 seconds or less, and subjected to a thermal reaction on a substrate to form a gallium oxide film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If gallium chloride or hydrochloric acid is used as raw material, then cost is reduced and material stability is improved, but film forming speed is considerably degraded
Solution Approach 1:
The invention changes the heating time parameter to 0.002 seconds or more and 6 seconds or less, which optimizes the reaction conditions for using gallium chloride or hydrochloric acid as raw materials. This parameter adjustment enables the thermal reaction to proceed efficiently, improving film forming speed while maintaining the cost advantage of using these inexpensive materials.
Solution Approach 2:
The invention introduces a preliminary heating step where the mist is heated for a specific duration (0.002-6 seconds) before deposition. This preliminary action prepares the raw material mist by activating the thermal reaction in advance, ensuring that when the mist reaches the substrate, the film formation process proceeds at high speed even with inexpensive raw materials like gallium chloride.
2Reliability
If gallium chloride or hydrochloric acid is used as raw material, then material availability is improved, but film forming speed is considerably degraded
Solution Approach 1:
By optimizing the heating time parameter to 0.002-6 seconds, the invention enables inexpensive and stable raw materials like gallium chloride to react efficiently. This parameter change compensates for the slower inherent reaction rate of these materials, maintaining high film forming speed while benefiting from improved material stability and availability.
3Manufacturing precision
If mist heating time is increased, then film formation quality is improved, but film forming speed is degraded
Solution Approach 1:
The invention identifies and applies an optimal heating time range of 0.002-6 seconds that balances film formation quality and speed. Within this parameter range, the thermal reaction achieves sufficient completion for high-quality film formation while maintaining fast processing speed, resolving the contradiction between quality and productivity.
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 improves the film forming speed and allows for the low-cost manufacturing of gallium oxide films, ensuring a stable and high-speed process.
Implementation Method 1
a mist generated by atomizing a raw-material solution or by forming a raw-material solution into droplets
Implementation Method 2
the mist is conveyed using a carrier gas
Implementation Method 3
the mist is heated, and the mist is subjected to a thermal reaction on the substrate
Implementation Method 4
the mist is subjected to a thermal reaction on the substrate to form a film
Implementation Method 5
the mist is subjected to a thermal reaction on the substrate to form a film
Data Source
AI summary
A method for manufacturing a gallium oxide film where a mist generated by atomizing a raw-material solution or by forming a raw-material solution into droplets is conveyed using a carrier gas, the mist is heated, and the mist is subjected to a thermal reaction on the substrate to form a film, whereas the raw-material solution, a raw-material solution containing at least a chloride ion and a gallium ion is used, and the mist is heated for 0.002 seconds or more and 6 seconds or less. This provides a method for manufacturing a α-gallium oxide film at low cost with excellent film forming speed.