Elastic Pad Conditioner for Uniform Polishing Pressure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional pad conditioners fail to achieve uniform conditioning of polishing pads due to discontinuous contact and uneven pressure distribution, leading to non-uniform polishing performance, reduced removal rate, and shortened pad life.
Innovation Solution
A pad conditioner with an elastic member that deforms to maintain consistent contact with the polishing pad, using a metal brush-like structure with wear-resistant coatings or tip pieces, and a pressure regulating mechanism to ensure uniform conditioning across the pad surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional rigid pad conditioner is used, then the structure is simple and easy to manufacture, but the contact with polishing pad is discontinuous and pressure distribution is uneven
Solution Approach 1:
The pad conditioner employs a flexible member instead of a rigid structure, allowing the conditioner to dynamically adapt its shape to follow the polishing pad surface contours. This dynamic flexibility ensures continuous contact and uniform pressure distribution across the pad surface, resolving the contradiction between conditioning uniformity and structural simplicity.
Solution Approach 2:
The invention uses a flexible member (such as a flexible plate or thin film structure) as the conditioner element. This flexible shell can deform to match the polishing pad surface, maintaining continuous contact and even pressure distribution. The flexible structure achieves superior conditioning uniformity while remaining relatively simple in design.
2Productivity
If a rigid conditioner is used, then the device complexity is low, but the startup time is long and removal rate uniformity is poor
Solution Approach 1:
The flexible member dynamically conforms to the polishing pad surface during operation, enabling immediate and uniform conditioning action from startup. This eliminates the long startup period required by rigid conditioners to achieve uniform contact, thereby improving removal rate uniformity without significantly increasing device complexity.
3Duration of action of stationary object
If a conventional conditioner operates, then the structure is simple, but the polishing pad life is shortened due to non-uniform conditioning
Solution Approach 1:
The flexible member maintains continuous and uniform contact with the polishing pad throughout its surface, preventing the non-uniform conditioning that leads to premature pad wear. This flexible design extends polishing pad life by ensuring even material removal and avoiding localized over-conditioning, while keeping the conditioner structure relatively simple.
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
The solution enables uniform pad conditioning, reduces startup time, improves removal rate uniformity, and extends the life of the polishing pad by maintaining consistent contact and optimal pressure distribution.
Implementation Method 1
upon contact of a vicinity of a tip end of the bending or deflecting or elastic member with the polishing pad, the bending or deflecting or elastic member elastically deforms
Implementation Method 2
Pad conditioning is an act to bring a pad conditioner (hereinafter, it may be simply referred to as a conditioner) having grinders such as diamond into contact with a polishing pad to scrape or roughen a surface of the polishing pad
Data Source
AI summary
A pad conditioning apparatus and method for conditioning a surface of a polishing pad which is used in a polishing apparatus for polishing works, having a bending or deflecting or elastic member and a supporting section to support a base end of the bending or deflecting or elastic member, wherein the bending or deflecting or elastic member elastically deforms upon contact of a vicinity of a tip end of the bending or deflecting or elastic member with the polishing pad, so that a pressure necessary to condition the pad is generated. A pad preparation apparatus using the pad conditioner; and a pad preparation method using the same, enable even conditioning of a polishing pad of an elastic body by following a surface of the polishing pad.