Reactor Susceptor Alignment Fixture for Uniform Chamber Spacing
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Solution Overview
Problem
Achieving precise positioning of the susceptor within a reaction chamber is challenging, leading to uneven processing outcomes in semiconductor manufacturing, such as non-uniform material deposition on substrates.
Innovation Solution
An alignment fixture is introduced, comprising a fixture body with an inner perimeter and measuring protrusions that aid in accurately positioning the susceptor within the reaction chamber, ensuring uniform spacing and alignment with the chamber's sidewalls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the susceptor is manually positioned in the reaction chamber, then the positioning process is simple, but the positioning precision is poor leading to uneven processing outcomes
Solution Approach 1:
The alignment fixture serves as an intermediary tool between the manual positioning operation and the susceptor. It provides physical reference features (indicators, alignment marks) that guide the operator to achieve precise positioning without requiring complex automated positioning systems. The fixture body with its specific geometry and measurement features mediates the transfer of alignment information from the chamber walls to the susceptor.
2Stability of the object's composition
If the susceptor is positioned without alignment aids, then the device structure is simple, but the spacing uniformity between susceptor and chamber sidewalls is poor
Solution Approach 1:
The alignment fixture is prepared in advance with pre-defined geometric features, indicators, and alignment marks that encode the correct spacing relationships. These features are manufactured with precise dimensions before use, so that when the operator uses the fixture during susceptor positioning, the uniform spacing is already predetermined by the fixture's geometry rather than requiring complex real-time adjustments.
Solution Approach 2:
The patent replaces complex mechanical positioning systems with simpler geometric and visual reference features. Instead of using motors, sensors, or automated control systems to maintain uniform spacing, the invention uses physical reference surfaces, alignment marks, and visual indicators that provide mechanical and optical references for achieving uniform spacing through manual alignment.
3Reliability
If precise positioning tools are added to the reaction chamber, then the processing uniformity improves, but the device complexity and installation difficulty increase
Solution Approach 1:
The alignment fixture is designed as a segmented, modular component that can be installed independently within the reaction chamber. Rather than integrating positioning features directly into the chamber structure or susceptor, the fixture is a separate element that divides the positioning function into manageable parts: the fixture body, the indicators, and the alignment features are distinct components that can be manufactured and installed separately.
Data Source
AI summary
An alignment fixture for a reactor system may comprise a fixture body comprising an inner perimeter at least partially defining a shape which comprises an inner space of the fixture body, wherein the inner space is configured to receive a susceptor of a reactor system; and/or a measuring protrusion coupled to the fixture body at a first position and protruding from the fixture body toward the inner space. The measuring protrusion may comprise an indicator between the fixture body and a measuring protrusion end of the measuring protrusion.