Substrate Processing Apparatus Automated Chamber Cleaning
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Solution Overview
Problem
Conventional substrate processing methods, particularly batch-type wet cleaning systems, face challenges in handling larger substrates, efficiency in cleaning fluid usage, and contamination risks, while single-wafer systems require frequent manual cleaning and expose users to harmful chemicals, reducing productivity.
Innovation Solution
A substrate processing apparatus with a spraying unit for cleaning and drying within the chamber, a management unit for residue removal, and a controller to automate the cleaning process, eliminating the need for manual chamber opening and reducing contamination risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If batch-type wet cleaning system is used, then multiple substrates can be processed simultaneously, but it is difficult to cope with increasing substrate size and cleaning fluid usage increases
Solution Approach 1:
The batch-type cleaning system is segmented into individual wafer processing slots, allowing each wafer to be cleaned separately while maintaining high throughput. The cleaning chamber is divided into multiple zones that can process wafers in sequence, reducing the total cleaning fluid required compared to immersing all wafers simultaneously.
Solution Approach 2:
The system uses hydraulic mechanisms to precisely control the movement and positioning of wafers during cleaning, and pneumatic systems for spray delivery. This allows efficient cleaning fluid distribution targeted at specific areas, reducing overall fluid consumption while maintaining cleaning effectiveness for larger substrates.
2Productivity
If batch-type cleaning apparatus is used, then multiple substrates are cleaned together, but contamination risk increases and productivity decreases due to frequent manual cleaning
Solution Approach 1:
The cleaning apparatus incorporates automatic self-cleaning functionality where the system cleans its own components (nozzles, chambers, and handling mechanisms) without manual intervention. This reduces contamination risk from human exposure and maintains high productivity by eliminating downtime for manual cleaning operations.
Solution Approach 2:
The system performs preliminary cleaning actions on critical components between substrate processing cycles, preventing contaminant accumulation before it can affect subsequent wafers. This maintains reliability while keeping the production flow continuous.
3Ease of manufacture
If manual cleaning operation is performed by opening chamber, then cleaning can be done, but user exposure to harmful chemicals increases and productivity decreases
Solution Approach 1:
The cleaning system is designed to be self-servicing with automated cleaning cycles that occur without chamber opening or manual intervention. This eliminates user exposure to harmful chemicals and maintains operational efficiency by keeping the cleaning process integrated into the normal production cycle.
Solution Approach 2:
The system uses robotic manipulators and automated spray systems as intermediaries to perform cleaning tasks that would otherwise require manual chamber opening. This protects users from chemical exposure while maintaining ease of cleaning through automated access mechanisms.
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
The apparatus automatically cleans the chamber interior, reducing maintenance cycles and improving productivity by preventing contamination and minimizing user exposure to hazardous chemicals.
Implementation Method 1
a spraying unit installed in an inner space of a chamber member in which a substrate is processed, configured to spray a cleaning liquid into the inner space of the chamber member so as to clean devices
Implementation Method 2
configured to spray a drying gas for drying the remaining cleaning liquid into the inner space of the chamber member
Implementation Method 3
a management unit configured to remove a residue remaining on the spraying unit
Data Source
AI summary
A substrate processing apparatus includes a spraying unit installed in an inner space of a chamber member in which a substrate is processed, spraying a cleaning liquid into the inner space of the chamber member so as to clean devices for discharging a chemical liquid to the substrate and then collecting the chemical liquid, and spraying a drying gas for drying the remaining cleaning liquid into the inner space of the chamber member, a management unit removing a residue remaining on the spraying unit after the spraying unit sprays the cleaning liquid, and a controller controlling the spraying unit and the management unit.