Wafer Chuck Structure for Stable Anodizing Planarization
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Solution Overview
Problem
Existing chuck apparatuses for wafer planarization via anodizing lack essential functions such as holding, energization, and insulation, making stable ECMP and ECMG processes difficult to perform effectively.
Innovation Solution
A chuck apparatus with a suction portion, an energizing portion, and a chuck cover that insulates the suction and energizing components, allowing for stable wafer holding and energization during anodizing processes, ensuring efficient and high-quality planarization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a chuck apparatus is used for wafer planarization via anodizing, then wafer holding is achieved, but stable ECMP and ECMG processes cannot be performed due to lack of energization and insulation functions
Solution Approach 1:
The patent combines three separate functions (holding, energization, and insulation) into a single integrated chuck apparatus. The suction portion provides holding function, the energizing portion provides energization function, and the chuck cover provides insulation function, all within one apparatus structure. This merging enables stable ECMP and ECMG processes by ensuring all necessary functions are present and coordinated.
Solution Approach 2:
The chuck apparatus is designed to perform multiple functions simultaneously: the suction portion holds the wafer, the energizing portion energizes the wafer for anodizing, and the chuck cover insulates the system. This multi-functionality makes the apparatus adaptable to both ECMP and ECMG processes, resolving the issue of insufficient functional completeness.
2Productivity
If the suction portion and energizing portion are integrated, then wafer holding and energization are achieved simultaneously, but insulation between components becomes difficult
Solution Approach 1:
The chuck cover acts as an intermediary insulating component between the suction portion and energizing portion. It electrically isolates these components while allowing them to function simultaneously, enabling efficient wafer holding and energization without direct electrical interference. The insulating material in the chuck cover mediates the electrical interaction between components.
Solution Approach 2:
The chuck cover is designed as an insulating cover that envelops the suction portion and energizing portion. This shell-like structure provides electrical insulation while maintaining the compact integrated design, allowing the apparatus to achieve both productivity through integration and electrical isolation through the insulating cover.
3Reliability
If the chuck cover covers the suction portion and energizing portion, then insulation is achieved, but the suction surface must remain exposed
Solution Approach 1:
The chuck cover is designed with selective coverage: it covers the suction portion and energizing portion to provide insulation, but leaves the suction surface exposed for wafer contact. This segmented coverage approach allows the cover to provide insulation where needed while maintaining access to the suction surface, balancing insulation performance with manufacturing simplicity.
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 enables stable and efficient wafer planarization by providing a chuck apparatus with integrated holding, energization, and insulation functions, ensuring uniform oxide film formation and removal, thereby achieving high-quality surface processing.
Implementation Method 1
a suction surface that suctions the wafer
Implementation Method 2
planarization of the wafer with the aid of anodizing
Implementation Method 3
a chuck cover that covers the suction portion and the energizing portion in an insulating manner
Data Source
AI summary
A chuck apparatus is configured to hold a wafer during planarization of the wafer with the aid of anodizing. The chuck apparatus includes a chuck cover, a suction portion, and an energizing portion. The suction portion includes a suction surface that suctions the wafer. The energizing portion is provided in the suction portion so as to come into contact and energize the wafer suctioned by the suction portion. The chuck cover covers the suction portion and the energizing portion in an insulating manner while exposing the suction surface.