Polishing Pad Detection Window Mold Integration
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Solution Overview
Problem
Conventional methods for manufacturing polishing pads with detection windows require mechanical cutting, increasing manufacturing time and cost, and often result in insufficient bonding strength between the polishing pad and the detection window, leading to interference with polishing quality due to liquid penetration.
Innovation Solution
A method that eliminates mechanical cutting by using a mold with a dummy detection window or protrusion structure to form a detection opening in the polishing layer, followed by filling and solidifying a detection window precursor, and optionally incorporating a buffer layer for enhanced bonding and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical cutting is used to form a detection opening on the polishing pad, then the detection window can be installed, but the manufacturing time increases and manufacturing cost increases
Solution Approach 1:
The detection opening is pre-formed in the mold during the polishing pad manufacturing process, before the actual polishing pad production. This preliminary action eliminates the need for subsequent mechanical cutting operations, reducing manufacturing time while ensuring proper detection window installation capability
Solution Approach 2:
The detection opening formation process is merged with the polishing pad manufacturing process itself. The mold simultaneously forms both the polishing pad structure and the detection opening, eliminating separate cutting operations and reducing overall manufacturing time
2Reliability
If mechanical cutting is used to form a detection opening on the polishing pad, then the detection window can be installed, but the manufacturing cost increases
Solution Approach 1:
The detection opening formation is combined with the polishing pad manufacturing process in a single molding operation. This eliminates the need for separate mechanical cutting tools and operations, reducing equipment investment and manufacturing costs while ensuring proper detection window installation
Solution Approach 2:
The mechanical cutting system is replaced with a mold-based forming system. Instead of using cutting tools to create the detection opening, the mold itself forms the opening during polishing pad manufacturing, eliminating cutting tool costs and associated manufacturing expenses
3Ease of manufacture
If the detection window is first formed and placed in a mold, then the polishing pad material can be filled, but the bonding strength between the polishing pad and detection window is insufficient
Solution Approach 1:
Instead of placing the detection window in the mold first and then filling polishing pad material around it, the invention inverts the sequence by forming the detection opening in the mold first, then filling the polishing pad material. This ensures the polishing pad material directly forms around the detection window, creating superior bonding strength
Solution Approach 2:
The detection opening is preliminarily formed in the mold before the polishing pad material is filled. This preliminary action ensures that the polishing pad material directly contacts and bonds to the detection window during the filling process, creating strong adhesion without requiring subsequent bonding operations
4Ease of manufacture
If the detection window is formed by placing it in a mold and filling polishing pad material, then the polishing pad can be manufactured, but liquid penetrates through the boundary between the polishing pad and detection window
Solution Approach 1:
The detection opening is preliminarily formed in the mold with precise dimensions and proper positioning. This preliminary action ensures that when the polishing pad material is filled, it creates a seamless boundary with the detection window, preventing liquid penetration that would interfere with optical detection
Solution Approach 2:
The polishing pad material is filled into the mold under controlled pressure, ensuring complete filling and proper bonding around the detection window. This pressure-controlled filling process eliminates gaps and boundaries where liquid could penetrate, maintaining polishing quality and preventing detection interference
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 approach simplifies the manufacturing process, reduces costs, and improves the bonding strength between the polishing pad and detection window, ensuring better polishing quality by preventing liquid penetration and enhancing tensile strength.
Implementation Method 1
a solidifying process is performed to form a polishing layer
Implementation Method 2
a solidifying process is performed to form a detection window
Implementation Method 3
A buffer layer is filled into the gap
Data Source
AI summary
A polishing pad having a detection window and a method of manufacturing the polishing pad are provided. A dummy detection window is pre-disposed in a mold. A polishing layer precursor is filled into the mold, and then a solidifying process is performed to form a polishing layer, wherein the polishing layer and the dummy detection window are separable completely. The polishing layer and the dummy detection window are separated from each other so as to form a detection opening in the polishing layer. The detection opening can alternatively be formed in a mold having a protrusion structure to replace the dummy detection window. A detection window precursor is filled into the detection opening, and then a solidifying process is performed to form a detection window.