Electrostatic Chuck Primer Insulator Adhesion
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Solution Overview
Problem
Conventional electrostatic chucks experience a decrease in attraction force due to discharge between the power feed pin and the heater, leading to instability in the electrostatic attraction, which can result in the object being attracted dropping off.
Innovation Solution
The application of a primer on the surface of the tubular insulator before bonding with the adhesive layer improves the adhesion between the insulator and the adhesive, eliminating the gap that causes discharge and maintaining the attraction force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power feed pin is directly connected to the electrode without proper insulation bonding, then the device complexity is reduced, but discharge occurs between the power feed pin and heater causing loss of attraction force
Solution Approach 1:
The patent introduces an intermediary system consisting of a tubular insulator bonded to the platform with adhesive layers and primers. This intermediary structure electrically isolates the power feed pin from the heater while providing a reliable bonding interface, preventing discharge without significantly complicating the overall device design.
Solution Approach 2:
The patent applies primers to the bonding surfaces before applying the adhesive layers. This preliminary action ensures proper adhesion between the insulator and platform, preventing gaps that would allow discharge. The primer application is a preparatory step that enhances the reliability of the subsequent bonding process.
2Reliability
If adhesive layer is applied without primer, then the manufacturing process is simpler, but the adhesion between insulator and adhesive is insufficient causing gaps and discharge
Solution Approach 1:
The primer is applied to the bonding surfaces before the adhesive layer, creating a preparatory treatment that enhances adhesion. This preliminary action ensures that the adhesive bonds effectively to the insulator surface, preventing gaps that would lead to discharge, while the process remains integrated into the manufacturing workflow.
Solution Approach 2:
The patent changes the surface properties of the bonding interface by applying a primer coating. This parameter change in surface chemistry enhances the adhesion between the adhesive and insulator, ensuring reliable bonding and preventing discharge paths without significantly complicating the manufacturing process.
3Reliability
If gaps exist between insulator and adhesive layer, then the manufacturing tolerance is more lenient, but discharge occurs reducing attraction force stability
Solution Approach 1:
The primer application serves as a preliminary action that prepares the bonding surface to ensure complete and gap-free adhesion. This preparatory step creates a surface that promotes uniform adhesive bonding, eliminating gaps that would allow discharge and maintain attraction force consistency.
Solution Approach 2:
The primer acts as an intermediary layer that facilitates complete bonding between the adhesive and insulator surface. This intermediary substance ensures that the adhesive forms a continuous, gap-free interface, preventing discharge paths 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 solution enhances the stability of the electrostatic attraction by preventing discharge between the power feed pin and the heater, ensuring consistent and reliable attraction.
Implementation Method 1
The adhesive layer bonds the platform and the tubular insulator together
Implementation Method 2
The first primer is provided on a surface of the tubular insulator facing toward the adhesive layer
Implementation Method 3
The tubular insulator is provided around the power feed pin
Implementation Method 4
an electrostatic chuck includes a platform, a power feed pin, a tubular insulator, an adhesive layer, and a first primer. The platform includes an electrode
Data Source
AI summary
An electrostatic chuck includes a platform, a power feed pin, a tubular insulator, an adhesive layer, and a first primer. The platform includes an electrode. The power feed pin contacts the electrode. The tubular insulator is provided around the power feed pin. The adhesive layer bonds the platform and the tubular insulator together. The first primer is provided on a surface of the tubular insulator facing toward the adhesive layer.