Process Chamber Volume Segmentation for Efficient Workpiece Coating
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Solution Overview
Problem
Semiconductor process chambers become obsolete or less efficient over time, leading to increased costs due to the high cost of new chambers and inefficiencies in maintaining or refurbishing workpieces like heaters and showerheads, which compete with substrate processing and reduce throughput.
Innovation Solution
A method and apparatus for adjusting the volume of a process chamber by installing a fixture that divides the chamber into smaller volumes, allowing for efficient coating of workpieces like heaters and showerheads outside the primary processing chamber, reducing the time and resources needed for maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a process chamber is used for coating workpieces, then the workpiece can be coated to address contamination, but the coating process competes with substrate processing and reduces throughput
Solution Approach 1:
The process chamber volume is segmented into a first volume for substrate processing and a second volume for workpiece coating by installing a fixture with a bottom plate that divides the chamber. This allows simultaneous or separate coating operations without interfering with substrate processing in the remaining volume, thereby maintaining throughput while enabling necessary maintenance coating.
2Productivity
If the process chamber volume is reduced by installing a fixture, then coating efficiency is improved, but the chamber complexity increases
Solution Approach 1:
The coating function is extracted from the main substrate processing operation by creating a separate second volume within the chamber. The fixture with bottom plate acts as a removable partition that can be installed only when coating is needed, leaving the chamber simple for normal substrate processing while enabling efficient coating when required.
Solution Approach 2:
The chamber configuration is made dynamic through the removable fixture. The bottom plate and fixture can be installed to create the second volume for coating, then removed or reconfigured for substrate processing. This dynamic reconfiguration allows the chamber to adapt to different operational needs without permanent structural modifications.
3Reliability
If workpieces are coated in the main process chamber, then coating can be performed, but additional resources are consumed and processing time increases
Solution Approach 1:
By segmenting the chamber volume with the fixture, the coating process is confined to a smaller second volume, which reduces the amount of precursor gas needed and shortens the coating time compared to coating the entire chamber volume. This maintains workpiece reliability while minimizing time loss.
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 reduces the time and resources required for coating, increases throughput, and decreases the overall cost of maintaining semiconductor processing chambers by optimizing the use of existing equipment.
Implementation Method 1
flowing, across the workpiece, a precursor gas, coating the workpiece as a coated workpiece
Data Source
AI summary
Methods and apparatuses for adjusting a process chamber volume are described. For example, a process chamber, after removing at least a component used to perform a function associated with the process chamber, may be installed with a fixture to adjust a volume of the process chamber. The process chamber with the fixture may reduce the amount of precursor gases and processing time for coating a workpiece. The workpiece, after the coating, may be placed in another process chamber to perform a function associated with the other process chamber.