Semiconductor Consumable Part Wear Detection via Trigger Feature Void
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Solution Overview
Problem
Semiconductor manufacturing chamber efficiency is reduced due to undetected wear in consumable parts, leading to costly diagnostics and prolonged part usage beyond their expected lifetime.
Innovation Solution
Integration of a trigger feature with a void on the surface of consumable parts that becomes visible upon erosion, allowing for visual inspection to determine the remaining lifetime, enabling timely replacement and improving manufacturing predictability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If consumable parts are kept in the chamber beyond their expected lifetime, then productivity is maintained by avoiding frequent replacements, but reliability deteriorates due to undetected wear leading to costly diagnostics and process failures
Solution Approach 1:
The patent applies preliminary action by embedding a trigger feature (void or cavity) within the consumable part that is positioned to be exposed at a predetermined wear threshold. Before the part actually fails or reaches end-of-life, the trigger feature becomes visible through the eroded surface, providing advance warning that the part needs replacement. This allows operators to schedule replacements proactively rather than reactively, maintaining both productivity and reliability.
2Reliability
If consumable parts are replaced frequently to ensure reliability, then reliability is maintained, but productivity deteriorates due to increased downtime for part replacement
Solution Approach 1:
The patent implements feedback by creating a visual indication system where the trigger feature (void or cavity) becomes exposed as the part wears. This provides continuous feedback on the actual wear state of the consumable part, allowing operators to monitor part condition and replace parts only when the trigger feature becomes visible. This feedback mechanism prevents both premature replacement (which would reduce productivity) and delayed replacement (which would reduce reliability).
3Device complexity
If no wear indication system is used, then device complexity is minimized, but measurement precision deteriorates because wear level cannot be accurately determined
Solution Approach 1:
The patent applies the color changes principle by using optical contrast rather than actual color change. The trigger feature (void or cavity) is positioned within the consumable part such that as the surface erodes, the void becomes visible through the transparent or translucent material. This creates a visual contrast that indicates wear level without requiring complex sensors or measurement systems. The visual indication is simple to observe and interpret, maintaining low device complexity while achieving high measurement precision for wear detection.
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
Minimizes downtime and costs by accurately predicting consumable part replacement, enhancing the operational efficiency and reliability of semiconductor processing systems.
Implementation Method 1
The void is configured to become visible when the surface is eroded from exposure to the plasma over time
Data Source
AI summary
A consumable part having a body with a surface is configured to be exposed to plasma during processing in a chamber. The consumable part includes a trigger feature disposed in the body. The trigger feature includes a void, and the void is an identifiable feature on the surface of the body to identify a wear level of the consumable part. The wear level is correlated to a lifetime remaining for the consumable part.