Wafer Processing Collector with Nested Partitions
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Solution Overview
Problem
Existing equipment for processing semiconductor wafers struggles to effectively handle both liquid discharge and gaseous exhaust separately for each process stage in a commercial production environment, requiring improved separation and control mechanisms.
Innovation Solution
A device with a chuck and a collector featuring vertically movable annular partitions and internal exhaust conduits allows for separate process regions, enabling efficient liquid drainage and gaseous exhaust management through a system of nested partitions and drainage channels, with each partition's position controlling the process region and exhaust flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If vertically movable partitions are arranged concentrically around the chuck to define separate liquid collection regions, then liquid discharge handling is improved, but separate gaseous exhaust handling for each process stage cannot be achieved
Solution Approach 1:
The patent implements nested partitions where inner partitions are positioned within outer partitions, creating multiple concentric process regions. Each partition can be independently raised or lowered to define separate liquid collection regions while simultaneously enabling separate gaseous exhaust handling through corresponding exhaust conduits associated with each region.
Solution Approach 2:
The collector is segmented into multiple independent process regions by vertically movable partitions. Each partition can be independently positioned to create separate liquid collection regions, and each region has its own exhaust conduit, allowing simultaneous separate handling of both liquid discharge and gaseous exhaust for different process stages.
2Device complexity
If a single collector design is used for multiple process steps, then device complexity is reduced, but adequate separate handling of liquid discharge and gaseous exhaust for each process stage cannot be achieved
Solution Approach 1:
The patent employs vertically movable partitions that can be dynamically raised or lowered to reconfigure the collector for different process steps. This dynamic capability allows a single collector design to provide separate handling of liquid discharge and gaseous exhaust for multiple process stages, maintaining reliability while avoiding the need for multiple separate collectors.
Solution Approach 2:
The single collector design is made multi-functional through the vertically movable partitions and associated exhaust conduits. The same collector structure can handle different process steps with separate liquid and gas flow requirements by repositioning partitions, providing universal applicability across multiple process stages without sacrificing separate handling capability.
3Ease of operation
If vertically movable partitions are used to define separate process regions, then process region control is improved, but particle generation may increase due to partition movement
Solution Approach 1:
The partitions are designed as disposable or easily replaceable components that can be discarded if contaminated with particles during movement. This allows frequent repositioning to control different process regions without concern for particle contamination from partition wear, as contaminated partitions can be replaced rather than cleaned and reused.
Data Source
AI summary
A device for processing wafer-shaped articles, comprises a chuck adapted to receive a wafer shaped article, and a collector surrounding the chuck. The collector comprises a base and a plurality of divider walls, as well as a plurality of nested partitions surrounding the chuck. Each of the plurality of nested partitions is positioned on a corresponding one of the plurality of divider walls, and each of the plurality of nested partitions is vertically movable so as to define a plurality of separate process regions within the collector depending on the vertical position of each of the plurality of nested partitions. At least one of the divider walls comprises an internal exhaust conduit communicating with an exhaust duct underlying the divider wall.