Plasma-Resistant CVD Component for Uniform Semiconductor Etching
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Solution Overview
Problem
Existing semiconductor manufacturing processes face challenges in achieving uniform energy distribution during plasma etching, leading to non-uniform plasma etching at stack boundaries, increased processing time, and particle generation, which affect productivity and cost.
Innovation Solution
A component for semiconductor manufacturing apparatus with a first surface having higher plasma resistance than a second surface, formed through chemical vapor deposition (CVD), minimizing exposure of boundaries and using materials like silicon carbide (SiC) or boron carbide (B4C) to enhance plasma resistance and prevent particle generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple deposition layers are stacked to improve plasma resistance, then plasma resistance is improved, but processing time increases and productivity decreases
Solution Approach 1:
The patent applies different surface treatments to different surfaces of the same component. The first surface (wafer contact surface) receives a treatment that enhances plasma resistance, while the second surface (apparatus contact surface) receives a different treatment optimized for mechanical properties. This local differentiation allows the component to achieve high plasma resistance where needed without requiring multiple thick deposition layers throughout the entire structure, thereby reducing processing time while maintaining reliability.
2Manufacturing precision
If complex stepped portions are added to achieve precise processing, then processing precision is improved, but processing time increases and productivity decreases
Solution Approach 1:
The patent incorporates stepped portions and complex geometries directly into the mold cavity design before deposition begins. This preliminary action allows the component to achieve precise dimensional accuracy and complex shapes in a single deposition process, eliminating the need for subsequent machining or multiple deposition steps, thereby maintaining high manufacturing precision while reducing overall processing time.
3Manufacturing precision
If boundaries of deposition layers are exposed during plasma etching, then etching uniformity is improved, but particle generation increases
Solution Approach 1:
The patent strategically positions deposition layer boundaries away from plasma exposure zones or designs the boundary regions with gradual transitions rather than sharp interfaces. By converting the potential harm of exposed boundaries (which cause non-uniform etching and particle generation) into a beneficial design feature, the patent maintains etching uniformity while minimizing particle generation. This is achieved through optimized layer stacking sequences and boundary region engineering.
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 component extends the life of semiconductor manufacturing apparatus parts, reduces etching rates, and enhances productivity by preventing particle generation, thus lowering production costs and improving process efficiency.
Implementation Method 1
a step of forming a deposition layer including SiC or B4C to surround the base material
Data Source
AI summary
The present invention relates to a component for a semiconductor manufacturing apparatus, and a heat-resistant material, and the component for a semiconductor manufacturing apparatus, according to the present invention, has a level difference with a plurality of layers on a cross-section thereof, wherein the plurality of layers includes a first surface exposed to plasma and a second surface loaded on the semiconductor manufacturing apparatus.