Matching Network Cooling Block for RF Thermal Management
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Solution Overview
Problem
Impedance matching networks in RF generators experience power loss and thermal issues due to inefficient heat dissipation, leading to potential failures from thermal cycling and mismatched impedance, especially as newer power sources produce more power and have different thermal expansion coefficients.
Innovation Solution
A cooling block with specific coolant channels and configurations is introduced to efficiently remove heat from the matching network, utilizing a continuous path with straight inlet, diagonal, transverse, and outlet channels to promote turbulence and effective heat distribution, and is designed to be compatible with RF generators and plasma chambers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a matching network is provided between the power source and load to provide impedance matching, then power transfer efficiency is improved, but heat is generated and dissipated in the matching network causing thermal issues
Solution Approach 1:
The patent extracts the heat dissipation function from the matching network by introducing a separate cooling block with coolant channels. The cooling block is thermally coupled to the matching network components, allowing heat to be extracted through coolant flow while the matching network continues to perform its impedance matching function.
Solution Approach 2:
The patent introduces coolant as an intermediary substance to transfer heat from the matching network. The coolant flows through channels in the cooling block, absorbing heat from the matching network components and carrying it away, thus mediating the heat transfer process without interfering with the electrical function of the matching network.
2Power
If power sources are upgraded to produce more power, then output power capability is improved, but heating of the matching network increases
Solution Approach 1:
The patent implements preliminary cooling action by pre-cooling the coolant before it enters the cooling block and maintaining continuous coolant flow. This preliminary action prepares the cooling system to handle increased heat loads from upgraded power sources, allowing the matching network to operate at higher power levels without excessive temperature rise.
3Reliability
If thermal cycling occurs in the matching network due to different thermal expansion coefficients of components, then impedance matching is achieved, but component failures such as solder joint failures occur
Solution Approach 1:
The patent applies local quality by providing targeted cooling to specific high-power components within the matching network through the cooling block. The cooling channels are positioned to deliver coolant directly to areas with highest heat generation, creating localized cooling zones that address thermal issues at the component level while maintaining overall system thermal stability.
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 cooling block effectively reduces heat-related failures and power losses in impedance matching networks by enhancing heat dissipation, ensuring stable operation even with increased power sources and varying thermal expansion coefficients.
Implementation Method 1
The cooling block provides passages in which a coolant may flow... The cooling block can remove heat from the matching network, and the coolant can remove heat from the cooling block.
Implementation Method 2
The cooling block can remove heat from the matching network... ensuring stable operation even with increased power sources and varying thermal expansion coefficients.
Data Source
AI summary
A cooling block and method therefor are provided. The cooling block defines a plurality of straight channels, the straight channels including an inlet channel, a diagonal channel, a transverse channel, and an outlet channel, the straight channels being serially communicative to provide a continuous path for coolant flow, wherein the diagonal channel meets the transverse channel at an acute angle at a diagonal and transverse channel junction.