Substrate Transfer Scheduling for Flexible Standby Cycle Timing
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Solution Overview
Problem
Existing substrate treatment apparatuses face inefficiencies in throughput due to long periods of unused treatment units, primarily caused by deferred treatments among successively transferred substrates and inadequate decision methods for transfer schedules.
Innovation Solution
A substrate treatment apparatus equipped with a controller that determines the possibility of performing preceding treatments on a substrate before the completion of similar treatments on a preceding substrate, allowing for optimized transfer schedules and reduced standby times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transfer robot delays the first circulation transfer of a following substrate to ensure the standard standby cycle, then the treatment unit can maintain proper standby timing, but the throughput is reduced due to longer total processing time
Solution Approach 1:
The patent applies dynamics by making the standby cycle flexible rather than fixed. The controller dynamically adjusts the standby cycle based on real-time conditions: when the preceding substrate requires circulation transfer, a longer standby cycle is used; when it does not require circulation transfer, a shorter standby cycle is applied. This dynamic adjustment resolves the contradiction by adapting the timing to actual operational needs, maintaining reliability while improving throughput.
Solution Approach 2:
The patent changes the parameter of standby cycle duration based on the transfer requirements of the preceding substrate. By conditionally adjusting this timing parameter, the system optimizes throughput without compromising treatment unit reliability. The controller modifies the standby cycle parameter from a fixed standard value to a variable value that responds to actual transfer operations.
2Reliability
If the transfer robot waits for the standard standby cycle after circulation transfer, then the treatment unit maintains proper timing, but the total processing time increases
Solution Approach 1:
The system dynamically adjusts the standby cycle duration based on whether the preceding substrate requires circulation transfer. When circulation transfer is not required, the standby cycle is shortened, reducing total processing time while maintaining adequate timing for treatment unit operations. This dynamic timing adjustment reduces unnecessary time loss while preserving treatment reliability.
Solution Approach 2:
The controller determines in advance whether the preceding substrate requires circulation transfer and pre-calculates the appropriate standby cycle duration. This preliminary determination allows the transfer robot to optimize its waiting time from the outset, avoiding unnecessary delays while ensuring proper timing for treatment unit operations.
3Reliability
If the transfer robot delays transfer to maintain standby cycle, then treatment unit timing is preserved, but the efficiency of the substrate treatment apparatus decreases
Solution Approach 1:
The patent implements dynamic standby cycle adjustment that responds to the actual transfer requirements of substrates. By adapting the standby cycle duration to whether circulation transfer is needed, the system maintains treatment unit timing reliability while maximizing apparatus efficiency. The controller continuously adjusts timing parameters based on real-time operational conditions.
Solution Approach 2:
The system changes the standby cycle parameter from a fixed standard value to a conditional variable that adjusts based on transfer requirements. This parameter change enables the apparatus to maintain reliable treatment timing while improving overall efficiency by eliminating unnecessary delays in the processing sequence.
Data Source
AI summary
A substrate treatment apparatus includes: treatment parts each of which performs a predetermined treatment; and a transfer mechanism which transfers a transfer object. Transfer objects are transferred in a predetermined transfer-in order into the substrate treatment apparatus. The substrate treatment apparatus includes a controller which acquires a process job. The controller determines before starting transfer of one transfer object to the treatment part, when the process job is different between the one transfer object and a preceding transfer object transferred into the substrate treatment apparatus prior to the one transfer object and a same kind of treatment is included in the respective process jobs thereof, a possibility of performing preceding execution of executing the same kind of treatment on the one transfer object previous to completion of the same kind of treatment on the preceding transfer object.