Electrostatic Chuck Assembly With Thermal Barrier Against Adhesive Peeling
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Solution Overview
Problem
Existing substrate fixing devices face issues with adhesive layer deterioration and heat escape to the base plate, which can lead to weight loss and peeling of the electrostatic chuck from the base plate, especially at high temperatures during semiconductor manufacturing processes.
Innovation Solution
A substrate fixing device is designed with a heat insulating layer having lower thermal conductivity than the base and adhesive layer, mounted between the adhesive layer and the electrostatic chuck, to prevent heat transfer and deterioration, along with a cooling medium flow path within the base plate for temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat insulating layer is provided on the base plate to prevent heat escape, then heat retention is improved, but the adhesive layer may still deteriorate due to heat transfer
Solution Approach 1:
A heat insulating layer is introduced as an intermediary component between the base plate and the adhesive layer. This heat insulating layer acts as a thermal barrier that reduces heat transfer to the adhesive layer, thereby preventing adhesive deterioration while maintaining heat retention in the electrostatic chuck assembly.
Solution Approach 2:
The patent employs composite material structure by combining the base plate, heat insulating layer, and adhesive layer into a multi-layer composite assembly. Each layer is selected with specific thermal properties to achieve the desired thermal management - the base plate provides structural support and heat generation, the heat insulating layer provides thermal barrier properties, and the adhesive layer bonds components while being protected from excessive heat.
2Loss of energy
If the thermal conductivity of the adhesive layer is increased to improve heat dissipation, then heat escape to the base plate increases, but adhesive layer deterioration is accelerated
Solution Approach 1:
The heat insulating layer serves as a thermal intermediary that decouples the thermal management function from the adhesive layer. Instead of relying on the adhesive layer to conduct heat away (which would cause deterioration), the heat insulating layer blocks heat transfer, allowing the adhesive layer to perform its primary bonding function without being subjected to thermal stress.
3Device complexity
If no heat insulating layer is provided to simplify the structure, then device complexity is reduced, but heat escapes to the base plate causing adhesive deterioration and peeling
Solution Approach 1:
The heat insulating layer is positioned as a critical intermediary component that prevents direct thermal contact between the base plate and the adhesive layer. This single additional layer provides comprehensive thermal protection, preventing both adhesive deterioration and electrostatic chuck peeling, while adding minimal structural complexity to the overall assembly.
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 prevents adhesive layer deterioration and heat escape to the base plate, ensuring the electrostatic chuck remains securely attached and maintaining the integrity of the substrate fixing device even at high temperatures, thereby enhancing the reliability of semiconductor processing.
Implementation Method 1
a heat insulating layer provided on the adhesive layer... the heat insulating layer has a lower thermal conductivity than the base and the adhesive layer
Implementation Method 2
an electrostatic chuck provided on the heat insulating layer. The electrostatic chuck includes a base and an electrostatic electrode provided in the base
Data Source
AI summary
A substrate fixing device includes a base plate, an adhesive layer provided on the base plate, a heat insulating layer provided on the adhesive layer, and an electrostatic chuck provided on the heat insulating layer. The electrostatic chuck includes a base and an electrostatic electrode provided in the base, and the heat insulating layer has a lower thermal conductivity than the base and the adhesive layer.