Omni-directional Conditioner Device for CMP
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Solution Overview
Problem
Conventional chemical mechanical polishing (CMP) processes require separate mechanisms for polishing and conditioning, which can lead to scratches on objects due to inefficient particle removal and directional limitations, necessitating a solution for simultaneous and omni-directional conditioning.
Innovation Solution
An omni-directional conditioner device with a carrier, conditioner, and directional adjustment units that allow for synchronized rotation in any direction, using a transmission mechanism and locking components to control the rotational direction of the conditioner, enabling simultaneous polishing and conditioning while expelling particles effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate mechanisms are used for polishing and conditioning, then each function can be performed independently, but the device complexity increases and particle removal efficiency decreases
Solution Approach 1:
The patent combines the polishing mechanism and conditioning mechanism into a single integrated device. The carrier simultaneously carries both the polishing pad and conditioner, allowing both functions to be performed in one operation. This merging eliminates the need for separate mechanisms while improving particle removal efficiency through the conditioner's ability to continuously remove particles from the polishing pad surface.
Solution Approach 2:
The carrier is designed as a multi-functional component that simultaneously performs both polishing and conditioning functions. By integrating both functions into a single device, the system achieves versatility without requiring separate mechanisms, thereby reducing overall device complexity while maintaining high particle removal efficiency.
2Object-affected harmful factors
If the conditioner rotates in fixed direction only, then the mechanism is simpler, but it cannot effectively expel particles in all operational conditions
Solution Approach 1:
The conditioner's rotational direction is made dynamic and adjustable rather than fixed. The directional adjustment unit allows the conditioner to rotate in different directions (clockwise, counter-clockwise, or bidirectional) depending on operational requirements. This dynamic capability enables effective particle expulsion under various polishing conditions without requiring overly complex control mechanisms, as the adjustment can be made through simple locking component positioning.
Solution Approach 2:
The rotational direction parameter of the conditioner is made changeable through the directional adjustment unit. By allowing the rotation direction to be adjusted between different states (clockwise, counter-clockwise, bidirectional), the system can adapt to different operational conditions and effectively expel particles in all scenarios without significantly increasing device complexity.
3Productivity
If polishing and conditioning are performed simultaneously, then productivity increases, but the risk of particles scratching the product increases without proper particle expulsion
Solution Approach 1:
The polishing and conditioning operations are merged into a single simultaneous process using the integrated carrier design. The conditioner operates concurrently with the polishing pad, continuously removing particles from the pad surface. This simultaneous operation increases productivity while the conditioner's particle removal function prevents scratch formation, thereby eliminating the harm associated with simultaneous operations.
Solution Approach 2:
The conditioner converts the potentially harmful particles generated during polishing into a beneficial situation by continuously removing them from the polishing pad surface. This particle removal function transforms the harmful effect (particles that could cause scratches) into a benefit (clean pad surface that prevents scratches), enabling simultaneous polishing and conditioning to proceed safely with increased productivity.
4Adaptability or versatility
If the carrier and conditioner have fixed rotational relationship, then the transmission mechanism is simpler, but it cannot adapt to different polishing conditions
Solution Approach 1:
The rotational relationship between the carrier and conditioner is made dynamic through the directional adjustment unit. The conditioner can be configured to rotate in different directions relative to the carrier based on polishing conditions. This dynamic adjustability provides versatility without excessive complexity, as the directional changes are achieved through simple locking component positioning rather than complex control systems.
Solution Approach 2:
The rotational direction parameter of the conditioner relative to the carrier is made adjustable. By allowing this parameter to be changed between different states (same direction, opposite direction, bidirectional), the system adapts to different polishing conditions. The complexity increase is minimal since the adjustment is achieved through a straightforward locking mechanism rather than a complex control system.
Data Source
AI summary
An omni-directional conditioner device includes a carrier that includes a holding part for holding and rotating an object for polishing purpose; a conditioner disposed around the carrier; and a transmission mechanism connected with the carrier on one side and the conditioner on the other side, the transmission mechanism including at least one directional adjustment unit that controls the rotational direction of the conditioner. When the directional adjustment unit is set in one position, the carrier and the conditioner rotate in a same direction, and when the directional adjustment unit is set in another position, the carrier and the conditioner rotate in opposite directions.