Electrostatic Chuck Filter Elements for RF Power Loss Reduction
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Solution Overview
Problem
Plasma processing apparatuses face issues with RF power loss and leakage due to the generation of RF components in the electrostatic chuck, which affects the efficiency and control of plasma processing.
Innovation Solution
Incorporating filter elements, such as resistance and inductor elements, within the electrostatic chuck to attenuate RF components and reduce power loss, while connecting these elements to DC generators for effective signal management, thereby minimizing RF power leakage and optimizing plasma processing conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If filter elements are added to the electrostatic chuck to reduce RF power loss, then RF power efficiency is improved, but device complexity increases
Solution Approach 1:
The filter element is integrated into the electrostatic chuck by embedding it within the dielectric member, merging the filtering function with the existing chuck structure. This reduces RF power loss while avoiding the need for separate external filter components, thus limiting the increase in device complexity.
Solution Approach 2:
The dielectric member serves multiple functions: it provides electrical insulation, supports the substrate, and houses the filter element. This multi-functionality allows the filter to be incorporated without significantly increasing overall device complexity, as the filter shares the physical space and structural role of the dielectric member.
2Loss of energy
If filter elements are integrated into the dielectric member, then RF power leakage is reduced, but manufacturing complexity increases
Solution Approach 1:
The filter element is prepared and positioned within the dielectric member during the manufacturing process, before final assembly. This preliminary integration allows for standardized fabrication steps and simplifies the overall manufacturing process by incorporating the filter early in the production sequence rather than requiring post-assembly installation.
Solution Approach 2:
The filter element is nested within the dielectric member, with the filter contained inside the hollow space or cavity of the dielectric structure. This nesting approach allows both components to be manufactured separately and then assembled together, reducing the complexity of manufacturing each individual component while achieving the integrated filtering 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 solution effectively reduces RF power loss and leakage, enhancing the efficiency and control of plasma processing by attenuating RF components and improving the management of RF signals within the electrostatic chuck.
Implementation Method 1
Incorporating filter elements, such as resistance and inductor elements, within the electrostatic chuck to attenuate RF components and reduce power loss
Implementation Method 2
a substrate support disposed in the plasma processing chamber, the substrate support including: a dielectric member having a substrate supporting surface
Data Source
AI summary
There is provided a plasma processing apparatus including: a plasma processing chamber; a substrate support disposed in the plasma processing chamber, the substrate support including: a dielectric member having a substrate supporting surface; a first filter element disposed in the dielectric member, the first filter element having a first terminal and a second terminal; and a first electrode disposed in the dielectric member, the first electrode being electrically connected to the first terminal. The plasma processing apparatus includes an RF generator coupled to the plasma processing chamber and configured to generate an RF signal; and a first DC generator electrically connected to the second terminal and configured to generate a DC signal.