Resonator Waveguide Layout for Uniform Plasma Generation
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Solution Overview
Problem
Existing plasma processing apparatuses face inefficiencies in generating uniform plasma due to suboptimal electromagnetic wave resonance and interference between components.
Innovation Solution
A plasma processing apparatus with a resonator waveguide path partially composed of an upper electrode, featuring a first and second end for resonance and an insulating portion to separate the upper electrode, promoting efficient electromagnetic wave resonance and uniform plasma generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the upper electrode is conductively connected to the resonator waveguide, then the electromagnetic wave resonance is enhanced, but electrical interference occurs between the upper electrode and the chamber wall
Solution Approach 1:
The waveguide structure is segmented into distinct electrical isolation zones. The upper electrode and chamber wall are electrically separated by positioning the waveguide between them, creating independent electrical domains that prevent interference while maintaining electromagnetic wave transmission functionality.
Solution Approach 2:
The waveguide acts as an intermediary component that transmits electromagnetic waves from the magnetron to the upper electrode while providing electrical isolation. It serves as a mediator that allows electromagnetic energy transfer without direct electrical connection, preventing harmful electrical interference.
2Manufacturing precision
If the waveguide path is extended to improve plasma uniformity, then the electromagnetic wave distribution is improved, but the device complexity increases
Solution Approach 1:
The waveguide structure performs multiple functions simultaneously: it transmits electromagnetic waves, provides electrical isolation between the upper electrode and chamber wall, and distributes power uniformly across the plasma generation space. This multi-functionality reduces the need for additional separate components, thereby managing complexity while achieving plasma uniformity.
Solution Approach 2:
The waveguide extends in the circumferential direction around the central axis of the chamber, utilizing the radial dimension to distribute electromagnetic energy uniformly. This dimensional approach allows improved plasma uniformity without proportionally increasing structural complexity, as the waveguide integrates into the existing chamber geometry.
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 apparatus achieves efficient and uniform plasma generation by optimizing electromagnetic wave resonance, enhancing processing efficiency and consistency.
Implementation Method 1
the resonator includes: a first end; a second end electromagnetically coupled to the emitter and provided to cause the electromagnetic wave to resonate between the first end and the second end
Implementation Method 2
an insulating portion configured to electrically separate the upper electrode from a conductive wall of the resonator that is conductively connected with the first end
Implementation Method 3
an emitter provided to emit an electromagnetic wave into a plasma generation space
Data Source
AI summary
A plasma processing apparatus includes: a chamber; a substrate support provided inside the chamber; an emitter provided to emit an electromagnetic wave into a plasma generation space; an upper electrode provided above the plasma generation space; and a waveguide configured to supply the electromagnetic wave to the emitter, wherein the waveguide includes a resonator that provides a waveguide path, wherein the waveguide path of the resonator is partially composed of the upper electrode, and wherein the resonator includes: a first end; a second end electromagnetically coupled to the emitter and provided to cause the electromagnetic wave to resonate between the first end and the second end; and an insulating portion configured to electrically separate the upper electrode from a conductive wall of the resonator that is conductively connected with the first end.