Double-Sided Wafer Conditioner With Modular Polishing Components
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Solution Overview
Problem
Existing conditioners for wafer polishing pads face challenges in maintaining optimal polishing efficiency due to debris accumulation, and the bonding layer's inability to securely hold abrasive particles leads to increased material consumption and waste.
Innovation Solution
A double-sided conditioner is designed with a carrier having upper and lower surfaces, featuring opening structures with polishing components and a binding material to securely fix the components. This allows both sides of the conditioner to be used for dressing operations, reducing the need for frequent replacements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the bonding layer thickness is increased to improve bonding strength between abrasive particles and substrate, then the bonding strength is improved, but the material consumption and waste generation are increased
Solution Approach 1:
The conditioner is divided into multiple independent polishing components (first polishing component and second polishing component) that can be separately replaced. This segmentation allows only the worn polishing components to be replaced rather than the entire conditioner, reducing material consumption while maintaining bonding strength through proper design of the bonding layer at component level
Solution Approach 2:
The bonding layer is applied locally only where polishing components are needed, rather than covering the entire substrate. The bonding layer is positioned specifically at the interface between the polishing components and carrier, optimizing material usage while ensuring adequate bonding strength at critical locations
2Device complexity
If a single-sided conditioner is used, then the structure is simple, but the conditioner must be replaced frequently after one side is worn
Solution Approach 1:
The conditioner is designed with dual functionality - both the first polishing component and second polishing component can perform dressing operations. The first polishing component dresses the polishing pad during normal operation, while the second polishing component provides backup functionality, allowing the conditioner to continue being used after one side is worn, thereby reducing replacement frequency
Solution Approach 2:
The conditioner transitions from a static single-sided design to a dynamic dual-sided system where polishing components can be independently replaced. The modular design allows the polishing components to be dynamically exchanged based on wear, extending the overall service life of the conditioner carrier while maintaining operational capability
3Loss of substance
If the bonding layer is made thinner to reduce material consumption, then the material consumption is reduced, but the abrasive particles can easily fall off during dressing
Solution Approach 1:
The bonding layer is designed as a composite structure combining organic bonding agents with inorganic fillers or reinforcement materials. This composite approach provides adequate bonding strength and particle retention with a thinner layer, reducing material consumption while maintaining reliability through the synergistic properties of the composite materials
Data Source
AI summary
A double-sided conditioner includes a carrier, a plurality of polishing components, and a binding material. The carrier includes an upper surface, a lower surface opposite to the upper surface, and a plurality of opening structures that are arranged at intervals around a carrier center. The polishing components are respectively disposed in the opening structures of the carrier. Each of the polishing components has a first polishing surface exposed from the upper surface of the carrier and a second polishing surface exposed from the lower surface of the carrier. The binding material is filled into the opening structures, so as to fix in position the polishing components.