Radially Articulating Process Head for Site-Isolated Deposition
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Solution Overview
Problem
Current semiconductor processing techniques, such as gradient processing, face challenges in achieving uniformity and efficiency for evaluating multiple process variations on a single substrate, leading to escalating R&D costs and limited experimentation capabilities.
Innovation Solution
A deposition system with a radially articulating process head that allows for site-isolated deposition on a substrate, enabling multiple regions to be processed in parallel, serially, or a combination of both, using a system with adjustable showerheads and concentric conduits to ensure uniformity and prevent cross-contamination, while allowing for rotation and linear movement of the substrate for comprehensive access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If gradient processing is used to deposit different amounts of material across the substrate, then additional information for processing evaluation is provided, but uniformity within regions and cross-contamination control are compromised
Solution Approach 1:
The substrate surface is divided into multiple discrete, site-isolated regions where each region can be processed independently with uniform conditions. The process head delivers deposition fluid through concentric conduits that confine material delivery to specific regions, preventing gradient effects while maintaining uniformity within each region.
Solution Approach 2:
Each site-isolated region on the substrate receives tailored processing conditions specific to that region's experimental requirements. The system enables different materials, unit processes, or process sequences to be applied to different regions while maintaining uniformity within each region, allowing comprehensive processing evaluation without cross-contamination.
2Adaptability or versatility
If a moving mask or shutter is used to deposit different amounts of material, then combinatorial processing is enabled, but cross-contamination and uniformity issues arise
Solution Approach 1:
The moving mask or shutter component is completely removed from the system. Instead, site-isolated regions are defined by the substrate's pre-existing structure or by the process head's selective positioning, eliminating the source of cross-contamination while maintaining combinatorial processing capability.
Solution Approach 2:
The concentric conduits act as intermediaries that deliver deposition fluid directly to specific site-isolated regions without requiring masks or shutters. The inner conduit delivers fluid to the central region while the outer conduit provides fluid barrier and exhaust, enabling precise material delivery without cross-contamination.
3Quantity of substance
If multiple process variations are evaluated on a single substrate, then R&D costs are reduced, but the complexity of the processing system increases
Solution Approach 1:
The process head is designed as a universal tool that can process multiple site-isolated regions on a single substrate with different materials and process parameters. The radially articulating mechanism with adjustable showerheads provides multi-functionality, enabling comprehensive combinatorial processing without requiring multiple specialized tools.
Solution Approach 2:
The process head incorporates dynamic elements including radially articulating arms that can position the head over different regions, and adjustable showerheads that can modify processing volume. This dynamic capability enables flexible processing of multiple variations while maintaining system efficiency.
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 efficient combinatorial processing, allowing for the evaluation of various materials and process sequences on a single substrate, mimicking conventional full wafer processing while minimizing inter-diffusion and contamination, thereby reducing R&D costs and enhancing experimentation capabilities.
Implementation Method 1
a deposition system having a radially articulating process head disposed within the deposition system. The radially articulating process head is capable of depositing a layer of material onto regions of a substrate
Implementation Method 2
provide exhaust for the deposition fluid through a cavity defined between an outer wall of the first conduit and an inner wall of the second conduit
Data Source
AI summary
The various embodiments of the invention provide for relative movement of the substrate and a process head to access the entire wafer in a minimal space to conduct combinatorial processing on various regions of the substrate. The heads enable site isolated processing within the chamber described and method of using the same are described.