Dual-Module Substrate Polishing Device with Variable Pad Diameters
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Solution Overview
Problem
The chemical mechanical polishing (CMP) process for semiconductor substrates faces challenges in efficiently handling substrates with varying polishing conditions due to factors like substrate roughness, mechanical pressures, and chemical interactions, leading to issues such as scratches, particles, and reduced productivity.
Innovation Solution
A substrate polishing device and system that incorporates a second polishing module adjacent to a first polishing module, allowing for a second polishing process with different conditions to be performed before and after the first process, thereby enhancing the efficiency and flexibility of the polishing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single polishing module is used for all polishing processes, then the device structure is simple, but the adaptability to different polishing conditions is insufficient
Solution Approach 1:
The polishing device is divided into multiple independent polishing modules (first polishing module and second polishing module), each capable of performing polishing processes under different conditions. This segmentation allows the system to handle various polishing requirements simultaneously without compromising adaptability, while maintaining relatively simple individual module structures.
Solution Approach 2:
Each polishing module is designed as a universal unit that can perform multiple polishing functions by adjusting process parameters such as pressure, rotation speed, and pad selection. The modules are equipped with interchangeable polishing pads and adjustable head portions, enabling them to adapt to different substrate types and polishing requirements.
2Productivity
If polishing processes are performed sequentially in separate modules, then the productivity increases, but the facility area required increases
Solution Approach 1:
The first and second polishing modules are positioned adjacent to each other within the same facility space, merging their operations into a compact integrated system. This arrangement allows substrates to be transferred between modules with minimal movement, reducing the overall facility area required while maintaining the productivity benefits of sequential processing.
Solution Approach 2:
The polishing modules are arranged in a spatial configuration where the second polishing module is positioned adjacent to or within the first polishing module's region. This dimensional arrangement allows multiple polishing operations to occur in close proximity, reducing the footprint area while maintaining efficient substrate transfer paths.
3Adaptability or versatility
If multiple polishing modules are added to handle different conditions, then the adaptability improves, but the device complexity increases
Solution Approach 1:
The system is segmented into multiple standardized polishing modules that can be independently configured. Each module contains its own polishing unit, head portion, and pad assembly, allowing flexible combination to match different polishing requirements without creating excessive overall complexity.
Solution Approach 2:
Different polishing modules are equipped with locally optimized characteristics such as varying pad diameters, pressures, and rotation speeds tailored to specific polishing tasks. The second polishing module features a smaller diameter pad compared to the first, providing localized quality adjustments for different substrate areas or polishing stages.
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 configuration improves the efficiency and productivity of the substrate polishing process by allowing for tailored polishing conditions, reducing the risk of defects like scratches and particles, and minimizing the overall facility area required.
Implementation Method 1
The CMP process is a process of polishing various thin films on the substrate to planarize or remove the surface of the substrate by making chemical changes to the surface of the material to be polished to facilitate mechanical polishing
Implementation Method 2
Chemical mechanical polishing (CMP) process, which planarizes semiconductor substrates, is a process of polishing various thin films on the substrate to planarize or remove the surface of the substrate by making chemical changes to the surface of the material to be polished to facilitate mechanical polishing
Data Source
AI summary
A substrate polishing device according to an embodiment includes a first polishing module disposed in a first region and including a plurality of first polishing units having first polishing pads, a second polishing module disposed in a second region and including at least one second polishing unit having a second polishing pad, and a transfer module configured to transfer a substrate between the first polishing module and the second polishing module. The second region is disposed adjacent to or within the first region, and a diameter of the second polishing pad is smaller than a diameter of the first polishing pad.