Self-Passivating Bonding Material for Plasma Chamber Components
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Solution Overview
Problem
Conventional bonding materials in semiconductor processing chambers are susceptible to erosion and degradation due to exposure to halogen-containing plasmas, leading to interfacial voids, surface defects, and reduced chamber lifespan, which affects the reliability and yield of substrate processing.
Innovation Solution
A bonding material with metal fillers, such as Al, Mg, Ti, Ta, and Zr, is used, which forms a self-passivating halogen-based metal layer when exposed to plasma, providing corrosion resistance and maintaining the integrity of chamber components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional bonding materials are used to join chamber components, then the components can be assembled, but the bonding material is susceptible to erosion and degradation by halogen-containing plasmas, leading to interfacial voids and surface defects
Solution Approach 1:
The patent converts the harmful plasma environment into a beneficial process by allowing controlled reaction between halogen-containing plasma and metal fillers (Al, Mg, Ti, Ta, Y, or Zr) in the bonding material. This reaction forms a protective halogen-based metal layer that passivates the bonding material surface, transforming the erosive plasma into a self-healing protective mechanism that prevents further corrosion.
Solution Approach 2:
The bonding material is formulated as a composite consisting of an adhesive base material combined with metal fillers (Al, Mg, Ti, Ta, Y, or Zr). This composite structure provides both the bonding functionality of the adhesive and the plasma-resistant properties of the metal fillers, which react with halogen-containing plasma to form protective layers.
2Productivity
If the bonding material is exposed to halogen-containing plasma, then the plasma can perform its etching function, but the bonding material degrades and creates interfacial defects
Solution Approach 1:
The patent enables the plasma to perform its necessary etching function while simultaneously protecting the bonding material. The metal fillers react with the halogen-containing plasma to form a protective layer, allowing the plasma to maintain its etching capability on the substrate while the bonding material surface is passivated, preventing degradation and maintaining interfacial joint integrity.
3Duration of action of stationary object
If the bonding material is eroded by plasma, then gaps form between components, but this accelerates disassembly and reduces chamber lifespan
Solution Approach 1:
The patent transforms the erosive plasma environment into a protective mechanism. The metal fillers in the bonding material react with halogen-containing plasma to form a stable halogen-based metal layer that prevents further erosion, thereby maintaining structural integrity and extending chamber component lifespan.
Solution Approach 2:
The patent changes the chemical composition of the bonding material surface through controlled reaction with plasma. The metal fillers undergo chemical transformation to form halogen-based metal compounds, altering the surface properties from plasma-susceptible to plasma-resistant, thereby stabilizing the bonding material against further degradation.
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 metal-filled bonding material effectively prevents plasma-induced corrosion, extending the service life of chamber components, reducing maintenance needs, and enhancing substrate processing yields by forming a protective halogen-based metal layer.
Implementation Method 1
The metal filler is suitable for reacting with halogen containing plasmas such that a halogen based metal layer is formed on the exposed portion of the bonding material upon exposure to the plasma
Implementation Method 2
forming a self-passivating layer upon exposure to halogen containing plasma, thereby preventing the underlying bonding material being corroded
Data Source
AI summary
Embodiments of the invention provide a robust bonding material (204) suitable for joining semiconductor processing chamber components. Other embodiments provide semiconductor processing chamber components joined using a bonding material 204 having metal filler 208 disposed in an adhesive layer. Other embodiments include methods for manufacturing a semiconductor processing chamber component having a bonding material 204 that includes metal filled disposed in an adhesive layer. The metal filler 208 is suitable for reacting with halogen containing plasmas such that a halogen based metal layer is formed on the exposed portion of the bonding material upon exposure to the plasma.