Multi-Conditioner Polishing Pad Layout for Faster Conditioning
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Solution Overview
Problem
Existing semiconductor polishing processes face challenges in efficiently conditioning polishing pads to achieve optimal thickness profiles and throughput, leading to reduced production capacity and extended conditioning times.
Innovation Solution
The use of a first pad conditioner and a set of supplementary pad conditioners to customize and expedite the conditioning of polishing pads, enhancing edge thickness profile control and reducing conditioning time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single pad conditioner is used to condition the polishing pad, then the device complexity is low, but the productivity is reduced due to extended conditioning times
Solution Approach 1:
The polishing apparatus divides the pad conditioning function into multiple independent pad conditioners (first pad conditioner and second pad conditioner) that operate simultaneously on different portions of the polishing pad. This segmentation enables parallel processing of pad conditioning, thereby reducing total conditioning time and increasing throughput without requiring a single complex conditioner to handle the entire pad surface.
2Productivity
If multiple pad conditioners are used to condition different portions of the polishing pad simultaneously, then the productivity is improved, but the device complexity increases
Solution Approach 1:
Each pad conditioner is configured to condition specific portions of the polishing pad with tailored conditioning parameters. The first pad conditioner conditions a first portion while the second pad conditioner conditions a second portion, allowing localized optimization of conditioning processes for different pad regions, which improves overall conditioning efficiency and productivity.
3Manufacturing precision
If conventional pad conditioning methods are used, then the device complexity is low, but the manufacturing precision is reduced due to inconsistent thickness profiles
Solution Approach 1:
The polishing apparatus incorporates sensors that monitor the thickness profile of the polishing pad during conditioning operations. This feedback mechanism allows the control system to adjust the operation of multiple pad conditioners in real-time, ensuring consistent thickness profiles across the pad surface and improving manufacturing precision while managing system complexity through automated control.
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
Improves production capacity and throughput by providing quicker pad conditioning, ensuring consistent polishing performance and extending the tool life of the polishing pad.
Implementation Method 1
a first pad conditioner and a set of supplementary pad conditioners to customize and expedite the conditioning of polishing pads
Data Source
AI summary
A polishing apparatus is provided. The polishing apparatus includes a platen. The polishing apparatus includes a polishing pad coupled to the platen and configured to be rotated by the platen. The polishing apparatus includes a first pad conditioner in contact with a polishing surface of the polishing pad. The polishing apparatus includes a second pad conditioner in contact with the polishing surface.