PECVD Workpiece Holder With Integrated Plasma and Heating Electrodes
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Solution Overview
Problem
Current plasma-enhanced chemical vapor deposition (PECVD) systems require separate heating systems and larger facilities, which increase complexity, cost, and time to reach process temperatures, limiting efficiency and throughput.
Innovation Solution
A workpiece holder configured to generate plasma and heat its surroundings using a single electrode assembly, with multiple electrodes capable of conducting both high-frequency AC voltage for plasma generation and low-frequency AC voltage for heating, allowing efficient operation as both a heating unit and plasma unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate heating systems and larger facilities are used in PECVD systems, then heating reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines the heating function and plasma generation function into a single workpiece holder structure. The workpiece holder includes both heating elements for thermal processing and electrode assemblies for plasma generation, eliminating the need for separate heating systems and reducing overall system complexity while maintaining heating reliability
Solution Approach 2:
The workpiece holder is designed as a multi-functional component that simultaneously performs holding, heating, and plasma generation functions. This universal design reduces the number of separate components needed in the PECVD system, simplifying the overall device architecture
2Reliability
If separate heating systems are used, then heating effectiveness is improved, but the facility size increases
Solution Approach 1:
The heating system is merged into the workpiece holder structure itself, with heating elements integrated directly into the holder body. This integration eliminates the need for separate external heating systems and reduces the overall facility size while maintaining effective heating capability
Solution Approach 2:
The heating elements are nested within the workpiece holder structure, with heating resistors positioned inside or on the surface of the holder. This nested arrangement maximizes space utilization and minimizes the facility volume required for effective heating
3Reliability
If separate heating systems are used, then heating control is improved, but time to reach process temperature increases
Solution Approach 1:
The workpiece holder with integrated heating elements is pre-positioned in contact with or close to the workpiece before the heating process begins. This preliminary positioning enables immediate heat transfer when power is applied, reducing the time to reach process temperature while maintaining precise heating control
Solution Approach 2:
The integrated heating system provides continuous and direct heat transfer to the workpiece through the workpiece holder structure. This continuous heating action eliminates delays associated with separate heating systems and maintains consistent temperature control throughout the heating process
4Reliability
If multiple separate components are used for heating and plasma generation, then component reliability is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges multiple separate components (workpiece holder, heating elements, and electrode assemblies) into a single integrated structure. This reduces the total number of components that need to be manufactured, assembled, and quality-tested, thereby reducing manufacturing costs while maintaining the reliability of each functional element
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 simplifies the PECVD facility design, reduces size and heating time, increases throughput, and enables efficient use of components, while ensuring safe and homogeneous heating.
Implementation Method 1
The workpiece holder is preferably also configured here, in addition to heating its surroundings, to generate a plasma from the process gas surrounding the workpiece holder
Implementation Method 2
For the mentioned purpose, the workpiece holder can have an electrode assembly, for example in the form of multiple electrodes arranged in parallel, to which a high-frequency electric AC voltage can be applied
Implementation Method 3
The heating typically takes place via resistance heating elements, which are installed on or in the process chamber wall
Implementation Method 4
the workpiece holder can have heating elements, for example in the form of multiple heating resistors, and can thus be configured to be operated as a heating unit
Implementation Method 5
The substance is deposited on the substrate by running a chemical reaction, which is drivable by temperature
Implementation Method 6
The substance is deposited on the substrate by running a chemical reaction
Data Source
AI summary
A workpiece holder for a plasma-enhanced chemical vapor deposition system is configured to produce a plasma from a process gas surrounding the workpiece holder. The workpiece holder is also configured to heat the surroundings of the workpiece holder to a process temperature provided for the vapor deposition. A chemical vapor deposition system and an operating method for the system are also provided.