Multiple Nozzle Gas Cluster Ion Beam System for Incompatible Mixtures
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Solution Overview
Problem
Conventional gas cluster ion beam (GCIB) systems face challenges in processing substrates with incompatible gas mixtures due to reactivity issues, limiting their application in semiconductor processing.
Innovation Solution
A multiple nozzle GCIB processing system is developed, allowing for the sequential or simultaneous use of multiple gas supplies and nozzles to form and direct gas cluster beams, enabling the creation of a single coalesced or intersecting beam that can handle incompatible gas mixtures by maintaining independent control over stagnation pressures and temperatures, and allowing for the use of different dilution gases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional single nozzle GCIB systems use reactive gas mixtures, then processing capability is improved, but reactivity incompatibility limits the range of usable gas combinations
Solution Approach 1:
The system divides the gas delivery function into multiple independent nozzles (first nozzle, second nozzle, etc.), each capable of delivering different gas mixtures separately. This segmentation allows incompatible reactive gases to be delivered through different nozzles without interacting adversely, while still enabling complex processing sequences.
Solution Approach 2:
The multiple nozzles are integrated into a single GCIB processing system that can sequentially or simultaneously perform multiple processing functions using different gas mixtures. The system achieves multi-functionality by switching between different nozzle configurations for different processing steps.
2Adaptability or versatility
If multiple gas supplies with incompatible mixtures are used sequentially, then processing versatility is improved, but processing time increases
Solution Approach 1:
The system enables continuous processing by eliminating the need to clear and repressurize the chamber between different gas mixture applications. Multiple nozzles can deliver different gas mixtures in rapid succession or simultaneously, maintaining continuous beam action on the substrate without interrupting the processing cycle.
Solution Approach 2:
Different gas mixtures are prepared and held ready in separate supply systems before processing begins. The multiple nozzles are pre-configured with their respective gas sources, allowing immediate switching between gas types without requiring chamber evacuation or system reconfiguration during processing.
3Manufacturing precision
If independent control of stagnation pressures and temperatures is implemented, then processing precision is improved, but system complexity increases
Solution Approach 1:
Each nozzle is equipped with independent control mechanisms for stagnation pressure and temperature, allowing local optimization of gas cluster formation parameters for each specific processing task. This local quality control enables precise adjustment of beam characteristics without affecting other nozzles.
Solution Approach 2:
The system independently adjusts stagnation pressure and temperature parameters for each nozzle to optimize gas cluster ion beam formation for different processing requirements. By changing these parameters locally at each nozzle, the system achieves precise control over beam properties while maintaining modular simplicity.
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 system effectively processes substrates by overcoming reactivity limitations, enabling the use of incompatible gas mixtures and improving the control over layer deposition and surface modification processes, such as SiO2 deposition and shallow trench isolation, with enhanced precision and efficiency.
Implementation Method 1
The gas clusters can be ionized by electron bombardment, which permits the gas clusters to be formed into directed beams of controllable energy.
Implementation Method 2
Clusters of atoms can be formed by the condensation of individual gas atoms (or molecules) during the adiabatic expansion of high pressure gas from a nozzle into a vacuum.
Implementation Method 3
Neutral clusters of various sizes are produced and held together by weak inter-atomic forces known as Van der Waals forces.
Data Source
AI summary
A gas cluster ion beam (GCIB) processing system using multiple nozzles for forming and emitting at least one GCIB and methods of operating thereof are described. The GCIB processing system may be configured to treat a substrate, including, but not limited to, doping, growing, depositing, etching, smoothing, amorphizing, or modifying a layer thereupon. Furthermore, the GCIB processing system may be operated to produce a first GCIB and a second GCIB, and to irradiate a substrate simultaneously and/or sequentially with the first GCIB and second GCIB.