Flow Splitter Manifold Pressure Monitoring for CMP Clog Detection
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Solution Overview
Problem
Existing CMP fluid delivery systems often experience obstructions and restrictions due to condensed and dried slurry, leading to inconsistent polishing results and frequent maintenance needs, as existing methods are impractical for detecting issues in multi-dispense nozzle systems.
Innovation Solution
A flow splitter manifold with a pressure measuring device is used to monitor fluid pressure across multiple delivery lines and nozzles, allowing for the detection of obstructions and restrictions by measuring pressure changes, and a controller can alert or stop the process when pressures exceed predetermined ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure measuring ports are added to each delivery line, then obstruction detection capability is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple pressure measuring ports into a single manifold body that serves all delivery lines. The manifold integrates pressure sensing functionality across multiple conduits without requiring separate measurement devices for each line, thereby improving obstruction detection while avoiding proportional increases in device complexity.
Solution Approach 2:
The manifold body performs multiple functions: it distributes fluid to multiple delivery lines and simultaneously provides obstruction detection capability through integrated pressure measuring ports. This multi-functionality allows a single component to address both fluid distribution and monitoring needs, improving detection capability without linearly increasing overall system complexity.
2Difficulty of detecting and measuring
If a flow splitter manifold with integrated pressure measuring ports is used, then obstruction detection in multi-dispense nozzle systems becomes feasible, but manufacturing complexity increases
Solution Approach 1:
The flow splitter manifold combines fluid splitting functionality with integrated pressure measurement capabilities in a single manufactured component. By incorporating pressure measuring ports directly into the manifold body during manufacturing, the system enables obstruction detection without requiring separate assembly of multiple discrete components, thereby improving detection feasibility while managing manufacturing complexity through integration.
3Measurement precision
If multiple pressure measuring devices are installed in each delivery line, then measurement accuracy for each line is improved, but system complexity and cost increase
Solution Approach 1:
The patent merges pressure measurement functionality across multiple delivery lines into a unified manifold structure. Instead of installing separate pressure measuring devices in each line, the system integrates pressure sensing capability at the manifold level, maintaining the ability to detect obstructions in individual lines while avoiding the complexity and cost of multiple discrete measurement devices.
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 solution enables effective detection of obstructions and restrictions in CMP fluid delivery systems, reducing equipment downtime and maintaining consistent polishing quality by identifying and addressing issues before they cause significant disruptions.
Implementation Method 1
measuring a pressure of the polishing fluid disposed in a manifold body of the flow splitter manifold
Data Source
AI summary
Embodiments of the present disclosure provide for apparatus used to detect clogs in a fluid delivery system during CMP processes and methods of detecting clogs in a fluid delivery system during CMP processes. In particular, embodiments herein provide a flow splitter manifold configured to enable monitoring of the pressure of the polishing fluid disposed therein. Monitoring the fluid pressure in the flow splitter manifold enables the detection of clogs in the delivery lines and/or dispense nozzles that inhibit and/or prevent the flow of polishing fluid therethrough or therefrom.