Reactor Component Surface Matching for Stable Etch Rates
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Solution Overview
Problem
Chemical buildup on reactor chamber components due to interactions with etchant gases and radicals affects the etching process of microelectronic devices, as cleaning alters the surface morphology and interaction rates, leading to unpredictable etch rates.
Innovation Solution
A method to control the cleaning and treatment of reactor chamber components to morphologically match their surface area with the original condition, using techniques like laser scanning microscopy to estimate and adjust the surface roughness and area, ensuring consistent interaction rates with etchant gases and radicals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If reactor chamber components are cleaned to remove chemical buildup, then the components can be reused, but the surface morphology changes and etch rate becomes unpredictable
Solution Approach 1:
The patent applies parameter changes by systematically varying cleaning parameters (chemistry, time, temperature, power) and treatment parameters (deposition conditions, plasma exposure) to transform the cleaned surface morphology back toward the original state. This resolves the contradiction by maintaining component reuse while restoring reliable etch rates through controlled morphological parameter adjustment.
Solution Approach 2:
The patent implements preliminary action by performing surface treatment (chemical vapor deposition or plasma exposure) immediately after cleaning to restore the surface morphology before the component is returned to service. This preliminary restoration ensures that the component achieves its original performance characteristics before reuse, eliminating etch rate unpredictability.
2Reliability
If cleaning is performed frequently to maintain component performance, then etch rate consistency is improved, but component lifespan is reduced
Solution Approach 1:
The patent uses parameter changes to optimize the cleaning process by identifying minimal effective cleaning durations and conditions that restore performance without excessive material removal. By precisely controlling cleaning parameters, the system achieves reliable etch rates while minimizing the frequency and intensity of cleaning cycles, thereby extending component lifespan.
3Productivity
If aggressive cleaning is used to remove all chemical buildup, then component reuse is enabled, but surface area and interaction rates change
Solution Approach 1:
The patent applies parameter changes by using gentle cleaning parameters followed by controlled treatment parameters to achieve the desired surface morphology. Instead of aggressive cleaning that removes material, the system uses mild cleaning combined with controlled deposition or plasma treatment to restore morphology, thereby enabling component reuse while maintaining precise surface area and interaction rate characteristics.
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
This approach allows for repeated reuse of reactor components without affecting the etch rate of microelectronic devices, reducing the need for new components and maintaining process stability, while also reducing environmental impact and costs.
Implementation Method 1
using techniques like laser scanning microscopy to estimate and adjust the surface roughness and area
Implementation Method 2
A method to control the cleaning and treatment of reactor chamber components to morphologically match their surface area with the original condition
Data Source
AI summary
A method is disclosed, which comprises estimating a first value of a parameter of a component, prior to a use of the component in a reactor. In an example, the parameter of the component is to change during the use of the component in the reactor. The component may be treated, subsequent to the use of the component in the reactor. A second value of the parameter of the component may be estimated, subsequent to treating the component. The second value may be compared with the first value, where a reuse of the component in the reactor is to occur in response to the second value being within a threshold range of the first value.