Semiconductor Processing Chamber Adapter for Multiple Precursor Flow
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Solution Overview
Problem
Conventional semiconductor processing systems face challenges in delivering precursors uniformly and protecting chamber components from damage, as different precursors can be reactive and cause degradation within the remote plasma unit, and traditional methods struggle with precursor mixing and control over etchant generation.
Innovation Solution
The system includes a remote plasma unit coupled with a processing chamber and an adapter that fluidly isolates multiple precursors, allowing for external mixing before delivery, using a mixing manifold with a tapered and flared section to ensure uniform precursor distribution, and incorporating an ion suppression element to control ionic species, thereby protecting the remote plasma unit and achieving uniform etchant delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple precursors are delivered through the remote plasma unit, then etchant generation is enhanced, but chamber components degrade due to precursor reactivity
Solution Approach 1:
The adapter divides the precursor delivery system into separate fluidly isolated channels (central channel for plasma precursor, second channel for first bypass precursor, third channel for second bypass precursor), allowing multiple precursors to be delivered simultaneously without mixing until they reach the mixing manifold outside the chamber, thus enhancing etchant generation while preventing component degradation
Solution Approach 2:
The mixing manifold acts as an intermediary component where precursors from different channels are mixed externally before entering the processing chamber, preventing direct contact between reactive precursors and chamber components while still achieving the desired etchant generation
2Productivity
If precursors are mixed inside the processing chamber, then etchant generation is achieved, but uniformity of precursor distribution is poor
Solution Approach 1:
The system performs preliminary mixing of precursors in the mixing manifold before they enter the processing chamber, ensuring uniform precursor distribution is achieved in advance, which then leads to uniform etchant generation across the substrate surface
3Object-affected harmful factors
If precursors are delivered through separate channels, then chamber component protection is improved, but system complexity increases
Solution Approach 1:
The adapter employs a nested channel structure where the second channel (annular channel) is defined about the central channel, and the third channel (annular channel) is defined about the second channel, creating concentric fluidly isolated pathways that protect chamber components while maintaining a compact design
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 etchant distribution across the substrate, protects chamber components from precursor reactivity, and allows for precise control over etchant generation, enhancing the quality and consistency of semiconductor processing.
Implementation Method 1
a remote plasma unit configured to receive a precursor and generate plasma
Implementation Method 2
a mixing manifold with a tapered and flared section to ensure uniform precursor distribution
Implementation Method 3
incorporating an ion suppression element to control ionic species
Data Source
AI summary
Exemplary semiconductor processing systems may include a processing chamber, and may include a remote plasma unit coupled with the processing chamber. Exemplary systems may also include an adapter coupled with the remote plasma unit. The adapter may include a first end and a second end opposite the first end. The adapter may define a central channel through the adapter. The adapter may define an exit from a second channel at the second end, and the adapter may define an exit from a third channel at the second end. The central channel, the second channel, and the third channel may each be fluidly isolated from one another within the adapter.