Ingot Growth Observation Window for Thermal Loss Reduction
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Solution Overview
Problem
Existing Czochralski ingot growing devices suffer from significant thermal energy loss due to the installation of vision cameras and sensors, which necessitate a direct view of the molten silicon surface, limiting effective thermal insulation to the upper and side portions of the chamber.
Innovation Solution
The device incorporates a chamber design with insulating materials on the side and lower portions, featuring an observation part with a penetrating extension member and lens for observation, along with a cooling and gas passage system to maintain thermal insulation while allowing accurate measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If insulating materials are installed on the upper and side portions of the chamber to maintain thermal insulation, then thermal energy loss is reduced, but vision cameras and sensors cannot be installed to measure ingot diameter and molten silicon level
Solution Approach 1:
A transparent observation window is introduced as an intermediary component that allows vision cameras and sensors to observe the molten silicon and ingot through the chamber wall without requiring direct access to the hot interior. This mediator enables measurement functionality while maintaining the insulating structure's integrity and thermal isolation.
Solution Approach 2:
The chamber structure is segmented into distinct functional zones: heavily insulated portions for thermal conservation, and localized observation areas with transparent windows for measurement. This segmentation allows different parts of the chamber to serve different purposes - thermal insulation where needed and optical access where measurement is required.
2Measurement precision
If a view port is installed to observe the contact area between ingot and molten silicon, then measurement is enabled, but radiant energy is directly emitted through the view port causing significant energy loss
Solution Approach 1:
The transparent observation window serves as a thermal mediator that allows optical transmission for measurement while presenting a barrier to radiant heat transfer. The window material and its installation create an interface that permits vision camera observation but reduces direct radiant energy emission compared to an open view port.
Solution Approach 2:
The traditional open view port mechanism is replaced with a transparent window system that combines optical clarity with thermal management capabilities. This substitution transforms the measurement interface from a purely mechanical opening to a composite structure that addresses both observation and thermal conservation requirements.
3Loss of energy
If insulating material is installed on the lower portion of the chamber, then thermal insulation is improved, but device complexity increases
Solution Approach 1:
The insulating structure is segmented into modular sections, with insulating materials applied to specific portions of the chamber (side and lower portions) rather than uniformly throughout. This segmentation allows thermal insulation to be implemented in a structured, manageable way that balances performance improvement with structural complexity management.
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
This configuration enhances thermal insulation efficiency by covering nearly the entire chamber, reducing energy consumption and improving measurement accuracy of ingot diameter and molten silicon levels.
Implementation Method 1
a cooling passage which is provided inside the extension member
Implementation Method 2
a side surface insulating material which is installed inside the chamber so as to insulate the side surface of the crucible
Data Source
AI summary
An energy-saving ingot growing device is disclosed. The ingot growing device according to the present invention comprises: a chamber having provided therein a crucible heated by a heat source in order to melt silicon; a side surface insulating material provided inside the chamber so as to insulate the side surface of the crucible; and an observation part provided to penetrate the chamber and the side surface insulating material so that the inside of the crucible can be observed.