Hydrophobic Coating for CMP Tool Components
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Solution Overview
Problem
Chemical mechanical polishing (CMP) tools face issues with substrate defects due to slurry-induced scratches and component erosion, leading to reduced lifespan and increased maintenance needs.
Innovation Solution
A hydrophobic layer with a contact angle of at least 90° is applied to CMP tool components to reduce fluid wetting and adherence of slurry particles, preventing erosion and extending component lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If polishing slurry is supplied to the polishing pad, then abrasive chemical solution is provided at the interface between the pad and substrate for effective polishing, but the slurry contacts and adheres to CMP tool components causing particle dislodgement and substrate scratches
Solution Approach 1:
A hydrophobic coating layer is applied to the CMP tool components as an intermediary barrier between the polishing slurry and the component surfaces. This coating prevents slurry particles from adhering to and eroding the components, thereby eliminating the source of substrate scratches while maintaining polishing effectiveness
Solution Approach 2:
The surface energy of CMP tool components is modified by applying a hydrophobic coating, changing the contact angle of the slurry from low (hydrophilic) to high (hydrophobic, at least 90°). This parameter change prevents slurry adhesion and particle dislodgement, reducing substrate defects
2Reliability
If polishing slurry contacts CMP tool components over time, then the slurry rubs over component surfaces dislodging particles that may scratch substrates, but continuous slurry contact also erodes the components decreasing their lifespan
Solution Approach 1:
The hydrophobic coating serves as a protective intermediary layer between the slurry and component surfaces, preventing direct contact and erosion. This extends component lifespan while maintaining substrate quality by preventing particle dislodgement
Solution Approach 2:
The hydrophobic coating is a relatively simple, easily reapplied layer that protects the more expensive and longer-lasting CMP tool components. When the coating wears, it can be reapplied rather than replacing the entire component, extending effective component life economically
3Duration of action of stationary object
If a hydrophobic layer with contact angle of at least 90° is applied to CMP tool components, then slurry particle adherence is reduced preventing erosion and extending component lifespan, but the component surface properties are modified
Solution Approach 1:
The surface properties of CMP tool components are intentionally modified by applying a hydrophobic coating that changes the contact angle to at least 90°. This controlled parameter change prevents slurry adhesion and extends component life, with the understanding that the surface properties are permanently altered but functionally improved
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 hydrophobic layer effectively reduces the likelihood of slurry particles dislodging component particles, minimizing substrate defects and extending the life of CMP tool components by preventing erosion and improving device quality and yield.
Implementation Method 1
a hydrophobic layer disposed on the surface of the body. The hydrophobic layer having a fluid contact angle of at least 90°
Data Source
Figure 1
Figure 2A~2C
Figure 3
AI summary
A component in a CMP tool disclosed herein having a surface and a hydrophobic layer deposited on the surface. In one example, the component is a component for delivering a fluid in a CMP tool. The component for delivering a fluid in a CMP tool includes an elongated member having a first end and a second end, and an elongated upper surface extending between the two ends. A hydrophobic layer is deposited on the elongated upper surface. In another example, the component is a ring shaped body having an upper side and a lower side. A hydrophobic layer is deposited on the inner surfaces of both the upper and lower sides. In another example, the component is a disk shaped body having a top surface, bottom surface, and ledge defined by the top and bottom surfaces. A hydrophobic layer is deposited on the surfaces and the ledge.