Run-Refill Chamber Layout for Continuous Solid Precursor Delivery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Chemical vapor deposition (CVD) systems face challenges in efficiently and consistently delivering solid precursors while minimizing downtime and space usage, particularly in the semiconductor industry, due to difficulties in sublimating and transporting solid precursors.
Innovation Solution
A chemical delivery system comprising a bulk container, run/refill chambers, and conduits that heat the precursors to convert them into vapor form, allowing for alternating use of containers to maintain continuous operation and efficient precursor delivery, with features like high surface area tubes filled with foam and heat transfer fluids for efficient sublimation and condensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a solid precursor is stored and transported in a CVD system, then the precursor can be used for deposition, but the system experiences challenges in sublimating and transporting the precursor vapor efficiently
Solution Approach 1:
The system divides the precursor storage and delivery function into separate modules: a bulk container for long-term storage, a run/refill chamber for active sublimation and vapor generation, and heated conduits for transport. This segmentation allows each component to be optimized independently, improving overall precursor delivery efficiency while managing system complexity through modular design.
Solution Approach 2:
The run/refill chamber acts as an intermediary between the bulk container and the deposition chamber. It receives solid precursor from the bulk container, performs sublimation to generate vapor, and then supplies this vapor to the deposition chamber through heated conduits. This intermediary approach solves the sublimation and transport challenges by dedicating a specific component to handle the phase change and vapor generation processes.
2Productivity
If the CVD system operates continuously without downtime, then productivity is improved, but the system requires additional space and complexity to maintain continuous operation
Solution Approach 1:
The system separates the bulk storage function (located in a sub-fab area) from the active delivery function (located near the process tool). The bulk container is positioned remotely where space is more available, while the compact run/refill chamber occupies minimal space near the deposition chamber. This spatial segmentation enables continuous operation without requiring large amounts of space in the critical process area.
Solution Approach 2:
The run/refill chamber serves as a compact intermediary that maintains continuous precursor supply despite the bulk container being located remotely. It stores sufficient precursor locally to bridge the gap between bulk container refills, ensuring uninterrupted vapor supply to the deposition chamber while occupying minimal space near the process tool.
3Area of stationary object
If the bulk container is located in a sub-fab area away from the process tool, then space near the tool is freed up, but the precursor transport distance increases
Solution Approach 1:
The run/refill chamber acts as an intermediary that decouples the location of the bulk container from the deposition chamber. The bulk container can be positioned remotely in a sub-fab area, while the run/refill chamber remains compact and located near the process tool. This intermediary approach allows the bulk container to be situated far away (reducing space requirements near the tool) without significantly increasing the effective transport distance, as the run/refill chamber receives precursor from the bulk container and maintains local vapor supply.
Solution Approach 2:
The run/refill chamber performs preliminary sublimation of the solid precursor before it reaches the deposition chamber. The bulk container supplies solid precursor to the run/refill chamber, which then pre-processes it into vapor form. This preliminary action allows the bulk container to be located remotely since the actual vapor generation occurs locally at the run/refill chamber, minimizing the impact of transport distance on deposition 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
The system ensures consistent and efficient delivery of solid precursors in CVD processes, minimizing downtime and space requirements by maintaining continuous operation and optimizing precursor usage, thereby enhancing the reliability and efficiency of the CVD system.
Implementation Method 1
The chemical delivery system is configured to heat the bulk container to sublimate the precursor thus converting the precursor into vapor form
Implementation Method 2
The chemical delivery system is also configured to heat the first conduit to maintain the precursor in vapor form
Implementation Method 3
features like high surface area tubes filled with foam and heat transfer fluids for efficient sublimation and condensation
Data Source
AI summary
A chemical delivery system includes a bulk container, a run/refill chamber, a first conduit and a second conduit. The bulk container stores a precursor. The run/refill chamber includes a plurality of spaced tubes having a plurality of surfaces for receiving the precursor in vapor form and storing the precursor in solid form. The first conduit connects the bulk container to the run/refill chamber for transporting the precursor from the bulk container to the run/refill chamber in vapor form. The second conduit connects the run/refill chamber to a deposition chamber for transporting the precursor from the run/refill chamber to the deposition chamber in vapor form.