CMP Slurry Dispenser Groove Segmentation for Uniform Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional CMP apparatuses experience non-uniform slurry distribution, leading to decreased removal rates and efficiency due to slurry being delivered only to the center of the polishing pad, resulting in significant reduction in CMP process efficiency and product quality.
Innovation Solution
A dispenser with a delivery arm featuring a slurry delivery groove and multiple openings along its length, ensuring uniform slurry distribution across the polishing pad, connected to a cleaning fluid system to prevent clogging and contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If slurry is delivered only to the center of the polishing pad, then the slurry delivery system is simple, but the removal rate uniformity across the polishing pad deteriorates
Solution Approach 1:
The slurry delivery system is segmented into multiple delivery grooves (first, second, third grooves) positioned at different locations on the delivery arm, with multiple openings in each groove. This segmentation allows slurry to be delivered to multiple discrete locations on the polishing pad simultaneously, improving removal rate uniformity while maintaining system simplicity through modular groove structures.
2Device complexity
If slurry is delivered only to the center of the polishing pad, then the delivery arm structure is simple, but the CMP process efficiency deteriorates
Solution Approach 1:
The delivery arm structure is segmented with multiple slurry delivery grooves positioned at different locations, each containing multiple openings. This allows parallel slurry delivery to multiple polishing zones, significantly improving CMP process efficiency by utilizing the entire polishing pad surface effectively rather than concentrating slurry delivery at a single center point.
Solution Approach 2:
The slurry delivery system transitions from a single-point (0D/1D) center delivery to a distributed multi-point delivery across the delivery arm length. The grooves extend along the delivery arm and distribute slurry across a two-dimensional area of the polishing pad, utilizing spatial distribution to enhance process efficiency.
3Device complexity
If slurry is delivered only to the center of the polishing pad, then the opening configuration is simple, but the slurry distribution uniformity deteriorates
Solution Approach 1:
The opening configuration is segmented into multiple groups of openings distributed across different delivery grooves along the delivery arm. Each groove contains multiple openings positioned at different locations, creating a segmented yet coordinated slurry distribution pattern that ensures uniform slurry coverage across the polishing pad while maintaining manageable structural complexity.
Data Source
AI summary
A dispenser for a chemical-mechanical polishing (CMP) apparatus, includes a delivery arm disposed over a polishing pad of a CMP apparatus, at least a slurry delivery groove formed in the delivery arm and extending along a length of the delivery arm, and a plurality of first openings connected to the slurry delivery groove.