Dual-Source Sputter Deposition for Uniform Thin-Film Thickness
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Solution Overview
Problem
Current sputtering technologies face challenges in achieving uniform thin film deposition on substrates, particularly in creating thin layers with precise thickness control and minimizing contamination between deposition processes.
Innovation Solution
A deposition apparatus with a chamber featuring a first and second deposition source, where the first source forms a thin initial layer and the second source forms a thicker layer, using a barrier to isolate the sources and a substrate holder to maintain the substrate position, allowing for precise control of deposition processes and minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single deposition source is used to form thin films, then the deposition process is simple, but it is difficult to achieve uniform thickness and precise thickness control
Solution Approach 1:
The deposition source is divided into multiple independent sources (first deposition source and second deposition source), each capable of depositing materials separately. This segmentation allows for precise control of film thickness by independently adjusting deposition parameters for each source, resolving the contradiction between simple configuration and precise thickness control.
Solution Approach 2:
The first deposition source performs preliminary deposition to form an initial thin film layer before the second deposition source operates. This preliminary action ensures uniform nucleation and adhesion, enabling subsequent precise thickness control by the second source without requiring complex real-time adjustments.
2Manufacturing precision
If multiple deposition sources are used to improve film uniformity, then thickness control improves, but contamination between deposition processes increases
Solution Approach 1:
A barrier is introduced to physically separate the first deposition source region from the second deposition source region. This extraction of the contamination pathway allows multiple deposition sources to operate sequentially without cross-contamination, enabling improved film uniformity while maintaining cleanliness.
Solution Approach 2:
The barrier acts as an intermediary element between the two deposition sources, blocking the transmission of contaminants, ions, or plasma from one deposition region to another. This mediator enables the system to achieve uniform film deposition from multiple sources without suffering from inter-source contamination.
3Manufacturing precision
If deposition is performed without substrate movement, then the process is simple, but film thickness uniformity across the substrate deteriorates
Solution Approach 1:
The substrate is made movable relative to the deposition source through a substrate movement device. This dynamic configuration allows the substrate to be positioned and moved during deposition, ensuring uniform exposure to the deposition flux across the entire substrate surface, thereby achieving uniform film thickness.
Solution Approach 2:
The substrate position is pre-adjusted using the movement device before deposition begins, and the substrate may be moved during deposition to optimize uniformity. This preliminary positioning action ensures that the entire substrate surface is properly aligned with the deposition source, achieving uniform thickness without requiring complex real-time control systems.
4Object-affected harmful factors
If a barrier is introduced to separate deposition regions, then contamination is reduced, but device complexity increases
Solution Approach 1:
The barrier is designed as a thin partition structure that effectively separates the two deposition regions while minimizing its physical presence in the chamber. This thin-film barrier provides adequate contamination protection without significantly increasing device complexity or interfering with the deposition processes.
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 enables the formation of uniform thin films with controlled thickness, reducing over-etching risks and improving the reliability of display panel components by ensuring consistent deposition across the substrate.
Implementation Method 1
A sputtering technology is a film formation technology in which plasma is used to generate ions that strike a sputtering target such that atoms of the sputtering target are deposited as a film on a substrate
Implementation Method 2
A sputtering technology is a film formation technology in which plasma is used to generate ions that strike a sputtering target such that atoms of the sputtering target are deposited as a film on a substrate
Data Source
AI summary
A deposition apparatus includes a chamber in which an inner space is defined, a movement device which moves a substrate to which a deposition material is provided, and a deposition source which is accommodated in the inner space and provides the deposition material. The deposition source includes a first deposition source which performs a first deposition process while the substrate is moved in a first direction by the movement device and a second deposition source which performs a second deposition process on the substrate after the first deposition process.