Transfer Chamber Robot Sensor Integration for Process Monitoring
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Solution Overview
Problem
Existing electronics manufacturing systems face inefficiencies in inspecting and cleaning process chambers due to time-consuming manual processes and the introduction of defects when wall sensors are used for detecting contamination, which also affect plasma uniformity.
Innovation Solution
A transfer chamber robot equipped with sensors that can perform measurements and data retrieval inside the process chamber, utilizing a machine-learning model to analyze sensor data and determine system failures, allowing for predictive maintenance and corrective actions without disrupting the vacuum environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wall sensors are installed in the process chamber to detect deposit buildup, then inspection capability is improved, but defects are introduced and plasma uniformity is affected
Solution Approach 1:
The patent introduces an intermediary inspection mechanism that does not require direct contact with the plasma environment. Sensors are mounted on the process chamber door or flange areas, which are outside the plasma region but still allow detection of deposit buildup through optical, electromagnetic, or other non-intrusive measurement methods. This mediator approach enables inspection capability while preserving plasma uniformity.
2Measurement precision
If manual inspection processes are used to check process chamber contamination, then measurement accuracy is improved, but inspection time and operational complexity increase
Solution Approach 1:
The system implements self-service inspection capabilities where automated sensors continuously or periodically monitor the process chamber for deposit buildup without requiring operator intervention. The inspection process is self-executing, with sensors automatically detecting contamination levels and triggering alerts or maintenance workflows when thresholds are exceeded, thereby reducing inspection time while maintaining detection accuracy.
Solution Approach 2:
The patent enables continuous monitoring of the process chamber through permanently installed sensors that operate throughout production cycles. This continuous inspection capability eliminates the need for periodic manual inspections, maintaining constant surveillance of contamination levels without interrupting manufacturing operations, thus reducing total inspection time while preserving measurement precision.
3Ease of operation
If process chamber door is removed for inspection, then accessibility for measurement is improved, but system complexity and operational difficulty increase
Solution Approach 1:
The patent positions sensors on intermediary structures such as the process chamber door, flange, or bellows areas that are accessible for installation and maintenance but remain outside the vacuum-sealed plasma chamber during operation. These intermediary locations allow sensor placement close enough to detect deposits on chamber walls without requiring door removal, thus improving accessibility while avoiding vacuum system disruption.
Data Source
AI summary
An electronic device manufacturing system includes a transfer chamber, a tool station situated within the transfer chamber, a process chamber coupled to the transfer chamber, and a transfer chamber robot. The transfer chamber robot is configured to transfer substrates to and from the process chamber. The transfer chamber robot is further configured to be coupled to a sensor tool comprising one or more sensors configured to take measurements inside the process chamber. The sensor tool is retrievable from the tool station by an end effector of the transfer chamber robot.