CMP Substrate Transporter Wetting to Prevent Surface Drying
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In semiconductor manufacturing, chemical mechanical polishing (CMP) processes face challenges with byproducts, agglomerated abrasives, pad debris, and slurry residues causing defects and reducing yield due to substrate drying during processing.
Innovation Solution
A CMP tool with a substrate transporter system that keeps substrates wet during transportation and idle times using a wetting solution, preventing contaminants from accumulating and improving surface quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If substrates are transported during CMP process, then productivity is improved through continuous processing, but substrate surfaces dry out causing particle accumulation and defects
Solution Approach 1:
A wetting solution is introduced as an intermediary substance between the substrate and the environment during transport. The wetting solution maintains a wet film on the substrate surface, preventing particle accumulation while allowing continuous substrate movement through the CMP tool.
Solution Approach 2:
The wetting solution is continuously applied to the substrate surface during transport to maintain the wet state. This continuous action ensures that the substrate surface remains protected from particle accumulation throughout the entire transport process, enabling uninterrupted productivity.
2Object-affected harmful factors
If substrates remain stationary during CMP process, then substrate surfaces remain wet preventing defects, but processing time increases reducing productivity
Solution Approach 1:
The wetting solution serves as a protective intermediary that enables substrate movement without the harmful effects of drying. This allows the substrate to be transported quickly between processing stations while maintaining surface wetness, reducing idle time compared to stationary approaches.
Solution Approach 2:
The patent replaces the mechanical constraint of stationary holding with a chemical protection mechanism (wetting solution). Instead of relying on mechanical positioning to maintain wetness, the chemical wetting solution actively protects the surface during dynamic transport, enabling faster processing cycles.
3Object-affected harmful factors
If wetting solution is applied during transport, then substrate surfaces remain wet preventing defects, but device complexity increases due to additional wetting system components
Solution Approach 1:
The wetting solution system is integrated into the existing CMP tool infrastructure, serving multiple functions: maintaining substrate wetness during transport, facilitating smooth substrate movement, and potentially aiding in particle removal. This multi-functionality reduces the need for separate dedicated systems, minimizing added complexity.
Solution Approach 2:
The wetting solution application system is merged with the existing slurry delivery and substrate handling mechanisms. By combining these functions into unified delivery paths and control systems, the patent avoids duplicating infrastructure, thereby reducing overall device complexity despite the added wetting capability.
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 approach effectively reduces defects and enhances yield by maintaining substrate surfaces in a wet state, preventing particle accumulation and improving device performance.
Implementation Method 1
A CMP tool with a substrate transporter system that keeps substrates wet during transportation and idle times using a wetting solution
Data Source
AI summary
Embodiments of the present disclosure relate a CMP tool and methods for planarization a substrate. Particularly, embodiments of the present disclosure provide a substrate transporter for use in a CMP tool. The transporter may be used transport and/or carry substrates among various polishers and cleaners in a CMP tool while preventing the substrates from drying out during transportation. By keeping surfaces of the substrates wet during substrate waiting time or idle time in the CMP tool, embodiments of the present disclosure prevent many types of defects, such as byproducts, agglomerated abrasives, pad debris, slurry residues, from accumulate on the substrate surface during CMP processing, thus improve yields and device performance.