Electrostatic Chuck Manufacturing via Spin Coating
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Solution Overview
Problem
Conventional methods for manufacturing electrostatic chucks using tape casting are time-consuming, complex, and result in low yield and high costs, necessitating an improved manufacturing approach.
Innovation Solution
The method involves depositing layers of dielectric materials using spin coating and direct spraying techniques, with optional functional and mechanical dielectric layers, on a handle made of materials like Al2O3, AlN, or Y2O3, to form an electrostatic chuck.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If tape casting techniques are used to manufacture electrostatic chucks, then the manufacturing process can be implemented, but the overall time required is relatively long and the process complexity increases
Solution Approach 1:
The patent replaces the mechanical tape casting process with a chemical deposition process. Instead of using a moving belt and doctor blade to physically deposit and dry dielectric material layers, the invention uses chemical vapor deposition (CVD) or atomic layer deposition (ALD) to chemically deposit dielectric layers directly onto the chuck substrate. This substitution of mechanical deposition with chemical deposition eliminates the time-consuming drying and handling steps inherent in tape casting, thereby reducing manufacturing time while maintaining process feasibility.
Solution Approach 2:
The patent changes the fundamental parameters of the deposition process. Instead of depositing material as a liquid slurry that requires drying (tape casting), the invention deposits material from a vapor or gaseous precursor that forms a solid film directly upon deposition. This parameter change from liquid-phase to vapor-phase deposition eliminates the need for subsequent drying steps and reduces overall process time while keeping the manufacturing process controllable and feasible.
2Ease of manufacture
If tape casting techniques are used to manufacture electrostatic chucks, then the manufacturing process can be implemented, but the process complexity increases and yield decreases
Solution Approach 1:
The patent replaces the complex mechanical tape casting system with a simpler chemical deposition system. Instead of requiring a moving belt, reservoir, doctor blade, and dryer assembly, the invention uses a chemical vapor deposition or atomic layer deposition system that deposits dielectric layers directly in a controlled manner. This substitution reduces process complexity by eliminating multiple mechanical components and steps while maintaining manufacturing feasibility through well-established semiconductor fabrication techniques.
Solution Approach 2:
The patent merges multiple separate tape casting steps into a single integrated deposition process. Instead of requiring multiple passes through the tape casting line to build up dielectric layers, the invention can deposit multiple layers in sequence within the same deposition chamber or system, combining what would be separate mechanical operations into a more streamlined chemical process. This merging reduces overall process complexity and improves manufacturing yield.
3Ease of manufacture
If tape casting techniques are used to manufacture electrostatic chucks, then the manufacturing process can be implemented, but the cost increases
Solution Approach 1:
The patent replaces the capital-intensive mechanical tape casting equipment with chemical vapor deposition or atomic layer deposition systems that are already widely used in semiconductor manufacturing. This substitution leverages existing infrastructure and expertise in the semiconductor industry, reducing the need for specialized equipment and reducing overall manufacturing costs while maintaining process feasibility.
Solution Approach 2:
The patent enables continuous deposition of dielectric layers without the interruptions inherent in tape casting. Instead of requiring the substrate to be removed and re-loaded for each layer, the invention can deposit multiple dielectric layers in a continuous sequence within the deposition chamber. This continuity eliminates downtime and increases productivity, thereby reducing the cost per unit while maintaining manufacturing feasibility.
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 method reduces manufacturing costs, enhances clamp force, minimizes electrostatic particle attraction, improves chucking and dechucking performance at high temperatures, and increases operating temperatures and thermal response.
Implementation Method 1
depositing at least one layer of a first dielectric material on a handle using spin coating
Implementation Method 2
depositing at least one layer of a first dielectric material on a handle using spin coating and/or direct spraying
Data Source
AI summary
A method of depositing material to manufacture an electrostatic chuck is provided. The method first deposits at least one layer of a first dielectric material on a handle using spin coating and/or direct spraying method. A functional electric layer is next deposited on the at least one layer of the first dielectric material. Finally, the electrostatic chuck if formed by depositing at least one layer of a second dielectric material on the functional electric layer and the first dielectric material using spin coating and/or direct spraying method.