Modular CMP Carrier Layout for Throughput-Dense Substrate Handling
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Solution Overview
Problem
Existing CMP systems are limited by substrate loading and unloading operations, which restrict throughput density, particularly in processes with shorter polishing times, necessitating the need for customizable and high-throughput density modular systems.
Innovation Solution
A modular CMP system with a carrier support module, carrier loading station, and polishing station, arranged in a one-to-one-to-one relationship, allowing simultaneous substrate loading/unloading and polishing operations, and featuring a carrier platform that pivots or rotates to facilitate efficient substrate transfer between polishing and loading positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If substrate loading and unloading operations are performed sequentially with polishing operations, then operational simplicity is maintained, but substrate processing throughput is limited
Solution Approach 1:
The CMP system is divided into multiple independent polishing modules, each capable of simultaneous substrate processing. This segmentation allows parallel operations across modules while maintaining operational simplicity within each module, thereby increasing overall throughput without proportionally increasing complexity.
Solution Approach 2:
The system employs dynamic substrate handling where carriers can be loaded, unloaded, and transferred between polishing stations simultaneously. This dynamic operation allows the system to adapt to different polishing times and throughput requirements, resolving the contradiction between productivity and complexity.
2Productivity
If the number of polishing stations is increased to improve throughput, then substrate processing capacity increases, but manufacturing floor space requirements increase
Solution Approach 1:
The system transitions from a planar arrangement of polishing stations to a three-dimensional configuration where carriers are suspended from an overhead support structure. This vertical arrangement allows multiple polishing stations to occupy overlapping horizontal footprints, dramatically increasing substrate processing capacity without proportionally increasing manufacturing floor space.
Solution Approach 2:
Multiple carrier assemblies are nested within the same horizontal footprint by suspending them from a common overhead support structure. This nesting arrangement allows multiple polishing operations to occur simultaneously in the same floor space, resolving the contradiction between productivity and area utilization.
3Productivity
If substrate transfer operations between polishing stations are performed sequentially, then operational simplicity is maintained, but substrate processing throughput density is limited
Solution Approach 1:
A robotic substrate handler acts as an intermediary that automatically transfers substrates between carrier assemblies and polishing stations. This intermediary device manages the complexity of simultaneous substrate transfers, enabling high throughput density while maintaining ease of operation through automated control.
Solution Approach 2:
The system employs self-service substrate handling where carriers are automatically positioned and transferred without manual intervention. The overhead support structure and robotic handler work together to autonomously manage substrate flow between polishing stations, increasing throughput density while simplifying operational complexity.
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
Enhances substrate processing throughput by enabling simultaneous loading and polishing, reducing bottlenecks in substrate handling and increasing manufacturing efficiency.
Implementation Method 1
The carrier support module is positioned to move the one or more carrier assemblies between a substrate polishing position disposed above the polishing platen and a substrate transfer position disposed above the carrier loading station
Data Source
AI summary
Embodiments herein include high throughput density chemical mechanical polishing (CMP) modules and customizable modular CMP systems formed thereof. In one embodiment, a polishing module features a carrier support module, a carrier loading station, and a polishing station. The carrier support module features a carrier platform and one or more carrier assemblies. The one or more carrier assemblies each comprise a corresponding carrier head suspended from the carrier platform. The carrier loading station is used to transfer substrates to and from the carrier heads. The polishing station comprises a polishing platen. The carrier support module, the substrate loading station, and the polishing station comprise a one-to-one-to-one relationship within each of the polishing modules. The carrier support module is positioned to move the one or more carrier assemblies between a substrate polishing position disposed above the polishing platen and a substrate transfer position disposed above the substrate loading station.