Substrate Treatment Apparatus for Metal Oxide Thin-Film Deposition
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Solution Overview
Problem
The sputtering deposition method for metal oxide thin-films requires frequent target replacements to adjust composition ratios, leading to reduced productivity and increased costs due to unintentional changes in film properties over time.
Innovation Solution
An apparatus using chemical vapor deposition with source gas supply units, a gas mixing unit, and a chamber to control the composition ratio of metal oxide thin-films by mixing (3-Dimethylaminopropyl)Dimethylindium, trimethylgallium, and diethylzinc gases, allowing for precise adjustment of the indium, gallium, and zinc ratios, and temperature control to maintain optimal film properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sputtering deposition method is used to deposit metal oxide thin-film, then thin-film can be formed on substrate, but target must be frequently replaced to adjust composition ratio, reducing productivity and increasing costs
Solution Approach 1:
The patent uses gas-phase delivery systems where metal organic compounds are transported as vapors through heated lines and deposited via chemical reactions on the substrate. This pneumatic/ vapor-phase approach replaces solid targets with gaseous precursors, enabling continuous composition adjustment without physical target replacement.
Solution Approach 2:
The patent controls film composition by adjusting parameters such as gas flow rates, temperatures, and precursor ratios in the vapor phase. By changing these process parameters rather than physical targets, the system achieves flexible composition control while maintaining continuous operation and high productivity.
2Reliability
If sputtering deposition method is used, then metal oxide thin-film can be deposited, but target composition changes unintentionally as deposition increases, varying film properties
Solution Approach 1:
The vapor-phase delivery system with heated transport lines ensures consistent precursor delivery and complete vaporization, maintaining uniform gas-phase composition throughout the deposition process. This eliminates the target composition degradation that occurs in sputtering over time.
Solution Approach 2:
The system continuously replenishes precursors from liquid reservoirs through vaporization and gas flow, automatically maintaining constant composition without degradation. The self-renewing vapor-phase supply ensures consistent film properties throughout extended operation periods.
3Adaptability or versatility
If sputtering method frequently replaces target, then composition ratio can be adjusted, but costs increase
Solution Approach 1:
The gas-phase precursor delivery system eliminates the need for expensive solid targets and their frequent replacement. Liquid precursors are delivered continuously through vaporization and gas flow, significantly reducing material costs while maintaining composition control flexibility.
Solution Approach 2:
The system achieves composition control through adjustable gas flow rates and temperature parameters rather than physical target changes. This parameter-based control eliminates the cost of target replacement while maintaining the ability to adjust film composition as needed.
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 uniform deposition of metal oxide thin-films with easily adjustable compositions, improving productivity and reducing costs by minimizing the need for target replacements and maintaining excellent film properties throughout the process.
Implementation Method 1
a gas mixing unit connected to each of the plurality of source gas supply units and having an inner space in which each of the plurality of source gases moves at a passing speed less than a supply speed of each of the plurality of source gases
Implementation Method 2
an apparatus for processing a substrate includes: a plurality of source gas supply units configured to respectively supply a plurality of source gases among which at least one contains (3-Dimethylaminopropyl)Dimethylindium (DADI)
Data Source
AI summary
The present disclosure relates to an apparatus for processing a substrate, and more particularly, to an apparatus for processing a substrate, which deposits a thin-film on a substrate.The apparatus for processing a substrate in accordance with an exemplary embodiment includes a plurality of source gas supply units configured to respectively supply a plurality of source gases among which at least one contains (3-Dimethylaminopropyl)Dimethylindium (DADI), a gas mixing unit connected to each of the plurality of source gas supply units and having an inner space in which each of the plurality of source gases moves at a passing speed less than a supply speed of each of the plurality of source gases, and a chamber connected with the gas mixing unit and having a reaction space to which the source gases mixed in the inner space are supplied.