Diffusion-Bonded Vaporizer Channels for Precise Mist Heating
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Solution Overview
Problem
Conventional vaporizers face challenges in maintaining a gaseous material at a desired temperature with minimal variations and are prone to deposit formation, which affects the reliability and efficiency of film formation processes in semiconductor manufacturing.
Innovation Solution
A vaporizer design featuring metallic first and second flow paths with specific diameter constraints and configurations, including serpentine heat medium flow and orthogonal arrangements, along with a manufacturing method using diffusion bonding of metallic plates, to ensure precise temperature control and minimize deposit formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional vaporizers are used to vaporize material, then film formation can be performed, but temperature control precision deteriorates and deposit formation increases
Solution Approach 1:
The vaporizer is divided into multiple heating zones with independent temperature control. Each zone has its own heater and temperature sensor, allowing precise control of temperature at different locations to prevent deposit formation while maintaining accurate overall temperature control.
Solution Approach 2:
Temperature sensors are placed throughout the vaporizer to provide real-time feedback to the control system. This feedback mechanism allows the system to adjust heating power dynamically to maintain precise temperature control and prevent conditions that lead to deposit formation.
2Productivity
If heating power is increased to improve vaporization efficiency, then material vaporization improves, but temperature variations increase
Solution Approach 1:
The heating system is segmented into multiple independent heating zones, each with its own heater and temperature control. This allows distributed heating that maintains high overall vaporization efficiency while preventing localized overheating and temperature variations.
Solution Approach 2:
The system dynamically adjusts heating parameters (power, duration, distribution) based on real-time temperature feedback. By changing heating parameters adaptively rather than using constant high power, the system maintains high vaporization efficiency while minimizing temperature fluctuations.
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 vaporizer achieves strict temperature control of the gaseous material with minimal temperature variations and reduced deposit formation, enhancing the reliability and efficiency of film formation processes.
Implementation Method 1
first flow paths through which a gaseous material flows and second flow paths through which a heat medium for heating the gaseous material flows
Implementation Method 2
a vaporizer for obtaining a gaseous material for film formation by vaporizing a mist of material through heating
Implementation Method 3
joining the metallic plates together by diffusion bonding
Data Source
AI summary
A vaporizer is provided that is capable of heating source material mist under precise temperature management and thereby able to acquire a gas source material which can be adjusted to a prescribed temperature and which has a very low level of variation in temperature and that produces almost no precipitate. The vaporizer heats and vaporizes a source material mist to obtain a gas source material for film forming. The vaporizer comprises a main part formed from a metal material and having therein first flows path through which the source material mist flows and second flow paths through which a heating medium for heating the source material mist flows, the equivalent area circle diameter of the cross-section of the first flow paths is 5 mm or less while the equivalent area circle diameter of the cross-section of the second flow paths is 2 mm or less, and there are no gaps aside from the second flow paths between one of the first flow paths and another of the first flow paths adjacent thereto in the inside of the main part.