Self-Centering Voltage Standoff for Precise Electrode Alignment
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Solution Overview
Problem
Traditional insulators in ion implantation systems often misalign during installation due to flat ends and loose fastening, requiring time-consuming fixtures and being prone to misalignment caused by thermal expansion differences.
Innovation Solution
A self-centering insulator design featuring a captive fastener with alignment features, such as tapered or cylindrical portions, that aligns with corresponding features on the electrode, ensuring precise positioning without external fixtures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional flat-ended insulators with loose fasteners are used, then the installation process is simple, but the insulator misaligns during installation and operation
Solution Approach 1:
The insulator incorporates a spherical alignment feature (ball) that fits into a corresponding spherical depression on the electrode. This curved geometry enables self-centering during installation, ensuring precise alignment without requiring complex external fixtures. The spherical interface provides automatic positioning in multiple degrees of freedom while maintaining structural simplicity.
2Manufacturing precision
If fixtures are used to align insulators during installation, then alignment precision is improved, but installation time increases
Solution Approach 1:
The insulator's alignment feature (spherical ball) and the electrode's corresponding depression work together to enable self-alignment during installation. The components automatically position themselves correctly through their geometric interface, eliminating the need for external alignment fixtures and reducing installation time while maintaining high precision.
3Reliability
If flat-ended insulators are used, then the insulator structure is simple, but thermal expansion causes loosening and misalignment
Solution Approach 1:
The spherical alignment feature embedded in the insulator body provides a geometric constraint that maintains alignment stability under thermal expansion. The ball-in-depression interface allows for thermal movement while maintaining proper positioning, preventing loosening and misalignment that occur with flat-ended designs during temperature variations.
Data Source
AI summary
An insulator that may be self-centering is disclosed. The insulator includes an alignment feature that allows it to self-center during installation. In some embodiments, the insulator is created with a captive fastener with a specific alignment feature. The internal cavity of the insulator is formed so as to have a corresponding alignment feature. When tightened, the captive fastener is pressed into the alignment feature of the internal cavity, allowing it to self-center. In other embodiments, the mating electrode is also modified to include a corresponding alignment feature. For example, in some embodiments, the alignment feature on the electrode comprises a specially shaped depression, while the insulator has a corresponding protrusion. In other embodiments, the insulator also has a protective shield.