Sensor Unit Thermal Management via Segmented Housing
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Solution Overview
Problem
The production of existing sensor units for semiconductor processes is elaborate and expensive due to the need for complex construction and isolation materials to handle high temperatures and aggressive substances.
Innovation Solution
A sensor unit design that eliminates the need for isolation materials between the measuring cell and housing, using a heat-conducting metal housing and a thermally insulating polymer cover to maintain temperature control and reduce production costs, with a gas-tight cavity and integrated electronics module for efficient heat management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If isolation materials are used between measuring cell and housing to handle high temperatures, then temperature control and protection are improved, but device complexity and production costs increase
Solution Approach 1:
The patent removes isolation materials from between the measuring cell and housing, extracting the thermal protection function to a separate thermally insulating cover that encloses the measuring cell. This eliminates the complexity of integrating isolation materials while maintaining thermal protection.
Solution Approach 2:
The housing is segmented into a thermally conductive portion and a thermally insulating cover portion, with each serving distinct thermal functions. The cover portion specifically protects the measuring cell from ambient temperature while the conductive housing manages heat from the process side.
2Reliability
If complex construction and isolation materials are used to handle high temperatures and aggressive substances, then reliability and precision are improved, but manufacturing complexity and costs increase
Solution Approach 1:
The patent extracts the thermal isolation function from the main housing structure and places it in a separate cover component. This simplifies manufacturing by allowing the housing to be produced without complex isolation material integration, while the cover provides the necessary thermal protection.
Solution Approach 2:
Different portions of the housing have different thermal properties: the main housing body is thermally conductive for heat management, while the cover portion is thermally insulating for protecting the measuring cell. This local differentiation optimizes both manufacturing and performance.
3Temperature
If a thermally insulating cover is added to protect the measuring cell, then temperature control is improved, but device complexity increases
Solution Approach 1:
The thermally insulating cover is merged with the housing to form an integrated assembly. The cover becomes an integral part of the housing structure, eliminating the need for separate isolation materials and reducing overall device complexity while maintaining thermal protection.
Solution Approach 2:
The thermally insulating cover acts as an intermediary between the thermally conductive housing and the measuring cell. It mediates the thermal interaction by blocking heat transfer from the ambient environment to the measuring cell, while allowing the housing to maintain its thermal management function.
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 design simplifies production and reduces costs while maintaining precision and reproducibility by allowing for effective heat management and isolation without additional insulation, enabling reliable operation at high temperatures.
Implementation Method 1
a thermally insulating cover portion which encloses the measuring cell and blocks heat transfer from a surrounding ambient environment to the measuring cell
Implementation Method 2
a thermally conductive housing portion which is in direct contact with the measuring cell and conducts heat away from the measuring cell to the process environment
Data Source
AI summary
A sensor unit including a measuring cell with a section-wise heat-conducting surface, a housing in which the measuring cell for the most part is contained, and an access channel to the measuring cell. The sensor unit includes a cavity that is confined for the most part by an outer surface of the measuring cell and by a wall of the housing facing towards the surface of the measuring cell. The cavity is closed in itself.