Multi-Layer Coating Diffusion Barrier Erosion Resistance
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Solution Overview
Problem
Semiconductor process chamber components face erosion, corrosion, and material diffusion issues due to extreme conditions, leading to increased defects and reduced durability.
Innovation Solution
A multi-layer coating comprising a diffusion barrier layer (e.g., TiNx, TaNx, Zr3N4) and an erosion resistant layer (e.g., YF3, Y2O3, Er2O3, Al2O3) is applied using techniques like atomic layer deposition, physical vapor deposition, or chemical vapor deposition to protect the components from corrosive gases and plasma environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-layer coating is used to protect chamber components, then the coating structure is simple, but it cannot simultaneously provide both diffusion barrier and erosion resistance
Solution Approach 1:
The protective coating is divided into two separate functional layers: a diffusion barrier layer (e.g., TiN, TaN, Zr3N4) that prevents material diffusion, and an erosion resistant layer (e.g., YF3, Y2O3, Al2O3) that protects against physical erosion. This segmentation allows each layer to optimize its specific function without compromise.
Solution Approach 2:
The coating system uses composite material structure combining different ceramic materials with complementary properties. The diffusion barrier layer uses nitride materials known for low diffusion rates, while the erosion resistant layer uses oxide/fluoride materials with high hardness and erosion resistance, creating a composite protective system.
2Reliability
If no protective coating is applied, then the component structure remains simple, but the components suffer from erosion, corrosion, and material diffusion under extreme conditions
Solution Approach 1:
The multi-layer coating is applied in advance to chamber components before they are subjected to extreme plasma and chemical environments. This preliminary protective action prevents erosion, corrosion, and diffusion issues from occurring during normal operation, extending component durability.
3Reliability
If a diffusion barrier layer is used alone, then material diffusion is prevented, but the coating lacks erosion resistance
Solution Approach 1:
The coating system is segmented into specialized layers where the diffusion barrier layer (TiN, TaN, Zr3N4) handles diffusion prevention while the erosion resistant layer (YF3, Y2O3, Al2O3) handles erosion protection. This functional segmentation resolves the contradiction by assigning specific protection types to specific layers.
4Reliability
If an erosion resistant layer is used alone, then erosion is resisted, but material diffusion to substrates cannot be prevented
Solution Approach 1:
The protective coating is segmented into two functional layers: the erosion resistant layer (e.g., Al2O3, Y2O3) provides physical erosion resistance, while the diffusion barrier layer (e.g., TiN, TaN) positioned beneath it prevents material diffusion to substrates. Each layer addresses its specific harmful factor independently.
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
The multi-layer coating effectively minimizes diffusion-based contamination and erosion, enhancing the durability and reliability of semiconductor process chamber components by preventing material diffusion and corrosion.
Implementation Method 1
The diffusion barrier layer may be deposited using a first deposition process selected from a group consisting of atomic layer deposition, physical vapor deposition, and chemical vapor deposition
Implementation Method 2
The diffusion barrier layer may be deposited using a first deposition process selected from a group consisting of atomic layer deposition, physical vapor deposition, and chemical vapor deposition
Implementation Method 3
The diffusion barrier layer may be deposited using a first deposition process selected from a group consisting of atomic layer deposition, physical vapor deposition, and chemical vapor deposition
Implementation Method 4
The erosion resistant layer may be deposited using a second deposition process selected from the group consisting of atomic layer deposition, physical vapor deposition, and chemical vapor deposition
Implementation Method 5
The erosion resistant layer may be deposited using a second deposition process selected from the group consisting of atomic layer deposition, physical vapor deposition, and chemical vapor deposition
Implementation Method 6
The erosion resistant layer may be deposited using a second deposition process selected from the group consisting of atomic layer deposition, physical vapor deposition, and chemical vapor deposition
Data Source
AI summary
A multi-layer coating for a surface of an article comprises a diffusion barrier layer and an erosion resistant layer. The diffusion barrier layer may be a nitride film including but not limited to TiNx, TaNx, Zr3N4, and TiZrxNy. The erosion resistant layer may be a rare oxide film comprising YZrxOy. The diffusion barrier layer and the erosion resistant layer may be deposited on the article's surface using a thin film deposition technique including but not limited to, ALD, PVD, and CVD.