Dynamic Thin-Layer Chemical Processing for Semiconductor Wafers
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Solution Overview
Problem
Current semiconductor wafer processing methods lack efficient and real-time monitoring and analysis capabilities, leading to inefficiencies and defects in ultra-clean surface preparation, especially with the complexity of modern semiconductor manufacturing processes.
Innovation Solution
A micro processing chamber design that allows for real-time chemical analysis and processing of semiconductor wafers by creating a narrow gap between the wafer and processing surfaces, using pressurized gas and vacuum to rapidly collect and analyze spent processing fluids, enabling in-line monitoring and efficient cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional wet processing methods are used for ultra-clean wafer surface preparation, then cleaning effectiveness is maintained, but processing time and chemical usage increase
Solution Approach 1:
The patent uses a spray mechanism that directs processing fluid onto the wafer surface through a narrow gap, utilizing fluid dynamics to achieve effective cleaning with reduced chemical usage and shorter processing time compared to traditional immersion methods
Solution Approach 2:
The invention transitions from traditional immersion cleaning to a spray-based approach that introduces a spatial dimension (narrow gap flow path) to enhance cleaning efficiency while reducing overall chemical consumption and processing time
2Reliability
If traditional processing monitoring is implemented, then process quality is ensured, but real-time analysis capability is lacking
Solution Approach 1:
The patent incorporates a monitoring system that provides real-time feedback on the processing fluid composition and wafer surface condition, enabling dynamic adjustment of processing parameters to maintain optimal cleaning effectiveness throughout the process
Solution Approach 2:
The narrow gap structure acts as an intermediary zone where processing fluid interacts with the wafer surface under controlled conditions, allowing for real-time monitoring of the cleaning process while maintaining effective contaminant removal
3Loss of substance
If narrow gap processing chamber is used, then chemical usage is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs adjustable gap control mechanisms that allow precise regulation of the narrow gap dimensions, maintaining uniform spacing between the spray nozzle and wafer surface to ensure consistent processing while minimizing chemical consumption
Solution Approach 2:
The system incorporates dynamic gap adjustment capabilities that allow the processing chamber to adapt gap dimensions based on wafer size and processing requirements, maintaining precision while optimizing chemical usage for different production scenarios
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 enables real-time analysis and efficient processing, reducing processing time and chemical usage, improving the accuracy and reliability of semiconductor wafer cleaning and etching, and enhancing process control.
Implementation Method 1
The processing chamber includes at least one entrance opening for directing gas into the chamber in a manner so that the gas acts as a carrier for the processing fluid to carry the processing fluid into the contoured portions of the collection chamber lower section
Implementation Method 2
When the processing chamber is in closed position, the semiconductor wafer is positioned between the upper working surface and the lower working surface to define a narrow gap between the upper working surface and the adjacent surface of the semiconductor wafer, and/or a narrow gap between the lower working surface and adjacent surface of the semiconductor wafer
Data Source
AI summary
A semiconductor wafer processing and analysis apparatus (20) includes a processing micro chamber (22) for closely receiving a semiconductor wafer (27) therein. The chamber may be opened for loading and removing the semiconductor wafers and then closed for processing of the wafer wherein chemical reagents and other fluids are introduced into the chamber. Small clearances are provided between the upper surface, the lower surfaces, and the perimeter edge of the wafer and the corresponding portions of the processing chamber. A high-speed collection system is provided for collecting and removing the spent reagents and fluids from the chamber for either on-line or off-line analysis or for waste treatment.