Gas-Phase Reactor Flange Assembly for Solid Precursor Delivery
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Solution Overview
Problem
Gas-phase reactor systems face challenges in controlling the flowrate of solid precursors at room temperature and pressure, which can lead to undesired condensation, making it difficult to achieve consistent film deposition in electronic device manufacturing.
Innovation Solution
A reactor system is designed with a reaction chamber, a solid precursor source vessel, a gas distribution system, and a flange assembly that includes heaters and cooling channels, allowing for precise control of precursor flow and preventing condensation, along with a monitoring system to regulate the amount of precursor flowing to the reaction chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If solid precursors are used at room temperature and pressure, then transport safety and ease of handling are improved, but flowrate control and condensation prevention become difficult
Solution Approach 1:
The patent changes the temperature parameter of the precursor delivery system from room temperature to elevated temperature (e.g., 100-300°C). This parameter change allows solid precursors to be vaporized and transported as gases, enabling precise flowrate control through gas flow regulation while maintaining the safety and ease of handling solid precursor storage
Solution Approach 2:
The patent utilizes phase transition by heating solid precursors to transform them into gas phase for delivery. The solid precursor in the source vessel is heated to vaporize and form a gas-phase precursor that can be controlled and delivered to the reaction chamber, resolving the contradiction between easy handling and precise flowrate control
2Reliability
If solid precursors are used at room temperature and pressure, then transport safety is improved, but condensation control and film deposition consistency deteriorate
Solution Approach 1:
The patent changes the temperature parameter throughout the precursor delivery path (heating lines, flange assemblies, and reaction chamber regions) to maintain precursors in gas phase. This prevents condensation and ensures consistent film deposition while solid precursors remain safely stored at room temperature in sealed vessels
Solution Approach 2:
The patent applies preliminary heating to the precursor delivery system components (lines, flanges, distributors) before precursor introduction. This preliminary action prevents condensation from occurring during precursor transport, ensuring consistent film deposition quality
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 configuration enables improved control over the deposition of epitaxial films, such as silicon and silicon germanium carbide, with precise doping levels, enhancing the manufacturing of electronic devices by ensuring consistent and reliable film formation.
Implementation Method 1
a heated line between the solid precursor source vessel and the reaction chamber
Implementation Method 2
The gas distribution system can include a first gas line coupled to a plurality of first gas outlets
Implementation Method 3
The flange assembly can include at least one heater
Implementation Method 4
The flange assembly can additionally or alternatively include at least one cooling channel
Implementation Method 5
The sealing member can be formed of, for example, silicone, perfluoroelastomer, or a fluoropolymer (e.g., FKM)
Data Source
AI summary
Gas-phase reactor systems and methods suitable for use with precursors that are solid phase at room temperature and pressure are disclosed. The systems and methods as described herein can be used to, for example, form amorphous, polycrystalline, or epitaxial layers (e.g., one or more doped semiconductor layers) on a surface of a substrate.