Deposition Mask Carbon Layer Arcing Prevention
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Solution Overview
Problem
Conventional deposition masks, typically made of metal materials, cause damage to substrates and induce arcing due to static electricity during the deposition process, leading to pattern distortion in flat panel displays and semiconductor devices.
Innovation Solution
A deposition mask with a carbon layer, comprising carbon nanotubes or graphene, is used to reduce static electricity discharge and enhance durability, featuring a body portion with openings and a carbon layer on the surfaces and sidewalls, providing low surface resistance and high electrical conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal mask is used for deposition, then the mask provides structural strength and durability, but the mask causes substrate damage and arcing due to static electricity
Solution Approach 1:
The patent applies composite materials by combining a metal body portion with a carbon layer coating. The metal body (e.g., stainless steel, aluminum, or copper) provides structural strength and durability, while the carbon layer coating reduces surface resistance and prevents static electricity accumulation. This composite structure resolves the contradiction by integrating the advantages of both materials: the mechanical strength of metal and the electrical conductivity of carbon.
Solution Approach 2:
The patent changes the surface resistance parameter of the mask by coating it with a carbon layer. The carbon layer has significantly lower surface resistance compared to bare metal, which transforms the electrical properties of the mask surface. This parameter change eliminates static electricity accumulation and prevents arcing, while the underlying metal structure maintains its strength.
2Stability of the object's composition
If a metal mask is used for deposition, then the mask maintains structural integrity, but the mask generates static electricity causing arcing phenomenon
Solution Approach 1:
The patent uses composite materials consisting of a metal body portion and a carbon layer coating. The metal body maintains structural integrity and stability, while the carbon layer coating provides electrical conductivity to dissipate static electricity. This composite approach allows the mask to simultaneously achieve structural stability and electrical discharge capability, eliminating the harmful arcing phenomenon.
Solution Approach 2:
The carbon layer acts as an intermediary between the metal body and the deposition substrate. It serves as a mediating layer that prevents direct contact between the metal and substrate, reducing the risk of substrate damage, while simultaneously providing a pathway for static electricity dissipation through its conductive properties.
3Reliability
If the mask surface is made conductive to prevent arcing, then electrical conductivity improves, but the mask durability may be compromised
Solution Approach 1:
The patent employs composite materials where the metal body portion provides long-term structural durability and the carbon layer coating provides electrical conductivity for arcing prevention. The carbon layer is applied as a thin coating that does not compromise the underlying metal structure's mechanical properties, thus maintaining mask durability while achieving reliable arcing prevention.
Solution Approach 2:
The patent applies local quality by coating only the surface of the metal mask with carbon layer. The bulk metal structure retains its original mechanical strength and durability, while the surface layer provides the necessary electrical conductivity. This localized approach ensures that the conductive property is achieved without compromising the overall structural integrity and lifespan of the mask.
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 carbon layer effectively reduces the arcing phenomenon and enhances the strength of the deposition mask, preventing substrate damage and ensuring a uniform deposition pattern.
Implementation Method 1
The carbon layer has low surface resistance and high electrical conductivity
Implementation Method 2
the carbon layer has high heat conductivity
Implementation Method 3
The deposition source is disposed in the deposition chamber and provides a deposition material to a deposition substrate
Data Source
AI summary
A deposition apparatus includes a deposition chamber, a deposition source, and a deposition mask. The deposition source is disposed in the deposition chamber and provides a deposition material to a deposition substrate. The deposition mask includes a body portion and a carbon layer. The carbon layer is disposed on a first surface making contact with the deposition mask and includes at least one of carbon nanotube or graphene.