Mixing Manifold Baffle Plates for Uniform Precursor Etching
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Solution Overview
Problem
Conventional semiconductor processing systems face challenges in delivering precursors uniformly to substrates, leading to non-uniform etching and potential damage to remote plasma units due to reactive precursor interactions, and struggle with mixing precursors effectively before delivery to the processing chamber.
Innovation Solution
The system incorporates a remote plasma unit coupled with a processing chamber, featuring a mixing manifold and baffle plates to mix precursors before delivery, ensuring uniform etchant distribution and protecting the remote plasma unit by only delivering one etchant precursor through the plasma unit, while additional precursors are mixed externally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple precursors are delivered through the remote plasma unit, then precursor mixing is achieved, but the remote plasma unit suffers damage from reactive precursor interactions
Solution Approach 1:
The patent extracts the mixing function from the remote plasma unit by introducing a separate mixing manifold and baffle plates. Multiple precursors are mixed externally in the mixing manifold before being delivered to the processing chamber, preventing direct interaction with the remote plasma unit and eliminating damage while achieving uniform precursor mixing.
Solution Approach 2:
The mixing manifold and baffle plates serve as intermediary components between the precursor sources and the processing chamber. These intermediaries enable precursor mixing and controlled delivery without requiring the precursors to interact within the remote plasma unit, thus protecting the unit from damage.
2Reliability
If precursors are delivered directly to the processing chamber without mixing, then the remote plasma unit is protected, but uniform etchant distribution is not achieved
Solution Approach 1:
The mixing manifold and baffle plates act as intermediary structures that enable uniform precursor mixing and controlled delivery to the processing chamber. This intermediary mixing system achieves uniform etchant distribution while keeping the remote plasma unit protected and separate from the mixing process.
Solution Approach 2:
The system performs preliminary mixing of precursors in the mixing manifold before delivery to the processing chamber. The baffle plates create turbulence and mixing zones that ensure uniform precursor distribution in advance, eliminating the need for mixing within the chamber and ensuring uniform etching from the start.
3Manufacturing precision
If precursors are mixed externally before delivery, then uniform etchant distribution is achieved, but system complexity increases
Solution Approach 1:
The system segments the precursor delivery function into distinct components: the mixing manifold for combining precursors and the baffle plates for creating mixing zones. This segmentation allows each component to perform a specific function efficiently, achieving uniform mixing without requiring a single complex mixing device.
Solution Approach 2:
The baffle plates utilize the natural flow of precursors through the mixing manifold to create turbulence and mixing zones. The system leverages the kinetic energy and flow dynamics of the incoming precursors themselves to achieve mixing, rather than requiring additional active mixing mechanisms, thus reducing overall system complexity.
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 ensures uniform processing across the substrate surface, reduces component damage, and enhances the quality of semiconductor devices by providing a controlled and uniform etchant mixture, improving the overall processing efficiency and device quality.
Implementation Method 1
a remote plasma unit coupled with the processing chamber
Implementation Method 2
mixing manifold may define a central channel through the mixing manifold, and may define a port along an exterior of the mixing manifold
Data Source
AI summary
Exemplary processing systems may include a processing chamber, and may include a remote plasma unit coupled with the processing chamber. Exemplary systems may also include a mixing manifold coupled between the remote plasma unit and the processing chamber. The mixing manifold may be characterized by a first end and a second end opposite the first end, and may be coupled with the processing chamber at the second end. The mixing manifold may define a central channel through the mixing manifold, and may define a port along an exterior of the mixing manifold. The port may be fluidly coupled with a first trench defined within the first end of the mixing manifold. The first trench may be characterized by an inner radius at a first inner sidewall and an outer radius, and the first trench may provide fluid access to the central channel through the first inner sidewall.