Multi-Station Chamber Control for Uniform Deposition and Etch
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Solution Overview
Problem
Multi-station processing chambers suffer from imbalances between stations, leading to undesired differences in substrate fabrication such as deposition thicknesses and etch depths, and inefficient resource utilization due to uniform treatment of all stations.
Innovation Solution
Individual control of components at each station within a multi-station processing chamber, including gas flow valves and RF switches, to adjust deposition and etch processes independently, ensuring uniformity across stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If uniform control is applied to all stations in a multi-station processing chamber, then operational simplicity is maintained, but deposition thickness uniformity and etch depth consistency deteriorate due to station-to-station imbalances
Solution Approach 1:
The control system is segmented into station-specific control components, where each station has its own controllable elements (gas flow valves, RF switches) that can be independently adjusted. This segmentation allows precise control of deposition and etch processes at each station to compensate for station-to-station imbalances, achieving uniform deposition thickness and etch depth across all stations without requiring complete system redesign
Solution Approach 2:
The patent implements local quality by allowing each station to have customized control parameters and settings tailored to its specific performance characteristics. Each station can be individually optimized with specific gas flow rates, power levels, and process parameters to achieve consistent results despite inherent variations between stations, rather than applying uniform settings system-wide
2Manufacturing precision
If each station is controlled individually with station-specific parameters, then deposition uniformity across stations is improved, but resource utilization efficiency deteriorates due to non-optimal use of common components
Solution Approach 1:
The control system dynamically adjusts process parameters and station operation sequences based on real-time requirements and common component availability. The system can flexibly allocate resources such as gas sources and RF generators to different stations as needed, optimizing resource utilization while maintaining individual station control for consistent etch depth and deposition quality
3Device complexity
If common components are shared across all stations, then system complexity is reduced, but process control precision deteriorates due to inability to independently adjust each station
Solution Approach 1:
While maintaining shared common components (gas sources, RF generators) to reduce system complexity, the patent segments the control functionality by providing individual control valves, switches, and parameter adjustment capabilities at each station. This allows precise independent control of each station's process parameters while utilizing shared resources, achieving both simplicity and precision
Data Source
AI summary
Various embodiments herein relate to apparatuses, systems, and methods for selective control of multi-station processing chamber components. In some embodiments, a method comprises: determining for a station of a plurality of stations, a number of deposition cycles to be performed; causing a first number of deposition cycles to be performed for each of the plurality of stations by causing a first plurality of control components associated with a first station and a second plurality of control components associated with a second station to be set to a first position; and responsive to determining that the first number of deposition cycles has been completed: causing at least one component of the first plurality of control components to be changed to a second position; and causing additional deposition cycles to be performed for the second station by causing the second plurality of control components to remain in the first position.