Lithography Cell Maintenance Scheduling for Coordinated Downtime
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Solution Overview
Problem
Current maintenance management systems for lithography systems lack an integrated approach to optimize maintenance timing across different apparatuses within a lithography cell, leading to inefficiencies and increased downtime due to independent management lines for coating, exposure, and laser apparatuses.
Innovation Solution
A litho cell management server is introduced to organize and analyze operating and maintenance information across these apparatuses, calculating standard maintenance timings and creating optimized maintenance schedules that minimize downtime and costs by coordinating maintenance across multiple consumables within a lithography cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If maintenance is managed independently for each apparatus (coating, exposure, laser), then each apparatus can be maintained according to its own schedule, but overall downtime increases and maintenance efficiency decreases
Solution Approach 1:
The patent merges independent maintenance management of multiple apparatuses (coating, exposure, laser) into a unified lithography cell-level management system. The central management server aggregates operating information from all apparatuses and coordinates maintenance schedules across them, transforming separate maintenance lines into an integrated system that reduces overall downtime.
Solution Approach 2:
The maintenance management server performs multiple functions: it manages operating information, calculates maintenance timing for different consumables, creates coordinated maintenance schedules, and outputs comprehensive maintenance plans. This universal system replaces multiple separate management approaches with a single multi-functional platform.
2Reliability
If maintenance timing is calculated without considering operating information and loss costs, then maintenance scheduling is simpler, but maintenance costs and downtime increase
Solution Approach 1:
The system implements feedback loops where operating information from apparatuses is continuously collected and fed back to the management server. The server uses this feedback to calculate optimal maintenance timing based on actual usage patterns and loss costs, then adjusts maintenance schedules accordingly, creating a dynamic optimization system.
Solution Approach 2:
The management server performs preliminary calculations of maintenance timing for each consumable before actual maintenance is needed. By analyzing operating information and loss costs in advance, the system determines optimal maintenance schedules proactively, preventing unnecessary downtime and costs.
3Productivity
If standard maintenance timing is calculated for each consumable independently, then individual consumable maintenance is optimized, but overall maintenance schedule coordination is poor
Solution Approach 1:
The patent combines individual consumable maintenance schedules into a unified lithography cell maintenance plan. The management server aggregates maintenance timing calculations for all consumables across different apparatuses and coordinates them to minimize overall downtime, merging separate maintenance activities into a coordinated schedule.
Solution Approach 2:
The maintenance schedule is dynamically adjusted based on operating information and actual usage patterns. The system calculates maintenance timing for each consumable independently but then coordinates them dynamically, allowing flexibility in scheduling while maintaining optimization for each individual consumable.
Data Source
AI summary
A maintenance management method for a lithography system according to a viewpoint of the present disclosure includes organizing and saving operating information for each of lithography cells that are each an apparatus group formed of a set of apparatuses and form the lithography system, organizing and saving maintenance information on consumables for each of the lithography cells, calculating a standard maintenance timing for each of the consumables for each of the lithography cells based on the operating information and the maintenance information on the consumable for each of the lithography cells, creating a maintenance schedule plan for each of the lithography cells or for each of manufacturing lines based on the standard maintenance timing, information on a downtime, and information on a loss cost due to the downtime for each of the lithography cells or for each of the manufacturing lines, and outputting the result of the creation of the maintenance schedule plan.