Protective Coating for Semiconductor Equipment Metal Surfaces
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Solution Overview
Problem
Semiconductor manufacturing equipment is susceptible to contamination and particle deposition due to the presence of dialuminum hexachloride vapor, which reacts with metal surfaces to form deleterious reaction products.
Innovation Solution
Applying a protective coating, such as alumina, to metal surfaces within the semiconductor manufacturing equipment using atomic layer deposition (ALD) to prevent reaction with dialuminum hexachloride vapor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal surfaces are used in semiconductor manufacturing equipment, then equipment structure and functionality are maintained, but contamination and particle deposition occur due to reaction with dialuminum hexachloride vapor
Solution Approach 1:
A protective coating layer is applied to metal surfaces to act as an intermediary barrier between the metal substrate and dialuminum hexachloride vapor. This coating prevents direct chemical reaction while maintaining the structural integrity and functionality of the metal components, thereby eliminating contamination without compromising equipment performance
Solution Approach 2:
The protective coating is applied in advance to metal surfaces before exposure to dialuminum hexachloride vapor. This preliminary protective action prevents the formation of deleterious reaction products and contamination, allowing the equipment to operate reliably without subsequent cleaning or maintenance interventions
2Object-affected harmful factors
If protective coating is applied to metal surfaces, then contamination is reduced, but device complexity increases
Solution Approach 1:
The coating application process utilizes controlled parameter changes including temperature, pressure, and chemical vapor deposition conditions to form a uniform protective layer. By optimizing these parameters, the process achieves effective contamination prevention while maintaining manageable process complexity through standardized manufacturing procedures
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 protective coating effectively suppresses the formation of deleterious reaction products, reducing contamination and particle deposition, and enhancing the performance and longevity of semiconductor manufacturing equipment.
Implementation Method 1
the metal surface is coated with a protective coating preventing reaction of the coated surface with the reactive gas
Implementation Method 2
Applying a protective coating, such as alumina, to metal surfaces within the semiconductor manufacturing equipment using atomic layer deposition (ALD)
Data Source
AI summary
Coatings applicable to a variety of substrate articles, structures, materials, and equipment are described. In various applications, the substrate includes metal surface susceptible to formation of oxide, nitride, fluoride, or chloride of such metal thereon, wherein the metal surface is configured to be contacted in use with gas, solid, or liquid that is reactive therewith to form a reaction product that is deleterious to the substrate article, structure, material, or equipment. The metal surface is coated with a protective coating preventing reaction of the coated surface with the reactive gas, and/or otherwise improving the electrical, chemical, thermal, or structural properties of the substrate article or equipment. Various methods of coating the metal surface are described, and for selecting the coating material that is utilized.