Wafer Processing System with Dual Tray Holding Apparatuses
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The inefficiency in wafer processing systems due to unnecessary wait times and increased operator workload caused by transferring wafers one at a time between apparatuses, leading to higher costs and potential wafer damage.
Innovation Solution
A wafer processing system that uses trays and a conveyor to transfer wafers one at a time, with dual tray holding apparatuses that allow for simultaneous unloading and loading, reducing wait times and operator requirements while preventing wafer damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wafers are transferred one at a time between apparatuses using operators, then flexibility in processing is maintained, but operator workload increases enormously and processing efficiency decreases
Solution Approach 1:
The system enables self-service through automated conveyor belts that transfer wafers between apparatuses without operator intervention. The tray holding apparatuses automatically load and unload trays, and the conveyor system autonomously transports wafers through the processing line, eliminating the need for operators to manually handle each wafer while maintaining continuous processing flow
Solution Approach 2:
Manual mechanical handling by operators is replaced with an automated mechanical conveyor system. The conveyor belt mechanism substitutes human operators for transferring wafers, while tray holding apparatuses with automated loading/unloading mechanisms replace manual tray handling, thereby reducing operator workload while maintaining processing efficiency
2Ease of operation
If multiple wafers are placed in a cassette for batch processing, then operator workload is reduced, but useless wait time increases when apparatuses are on standby
Solution Approach 1:
The batch cassette is segmented into individual wafer units, each placed in its own tray. This allows wafers to be processed individually rather than as a batch, enabling the system to maintain continuous operation with multiple trays in the pipeline, thereby eliminating wait times while keeping operator workload low through automation
Solution Approach 2:
Multiple trays are prepared in advance and placed on the conveyor system before processing begins. This preliminary preparation ensures that when one tray is being processed, other trays are already in position or en route, eliminating idle wait time for the apparatuses while the automated system manages the workflow without requiring operator intervention
3Adaptability or versatility
If wafers are transferred individually by operators, then processing flexibility is maintained, but the number of operators must be increased leading to higher costs
Solution Approach 1:
The automated conveyor and tray holding apparatuses perform the transfer functions that would otherwise require operators, eliminating the need to increase staff numbers. The system maintains flexibility through programmable conveyor paths and adjustable tray handling while keeping the operator count low
Solution Approach 2:
Human operators are replaced with an automated mechanical system consisting of conveyor belts and tray holding apparatuses. This substitution maintains processing flexibility through programmable control while eliminating the need to hire additional operators, thereby reducing labor costs without sacrificing adaptability
4Device complexity
If wafers are handled manually during transfer, then processing can be performed with simple equipment, but wafer damage risk increases
Solution Approach 1:
Manual wafer handling is replaced with an automated conveyor system that uses controlled mechanical transfer mechanisms. The tray holding apparatuses securely hold wafers during transfer, and the conveyor belt provides gentle, controlled movement, eliminating the rough handling that occurs with manual operations while keeping the equipment design relatively simple
Solution Approach 2:
Trays serve as intermediaries between the conveyor system and the wafers. The wafers are held securely in the trays during transfer, which protects them from damage. The trays absorb the mechanical stresses of transfer while keeping the wafer itself isolated and protected, thereby maintaining wafer integrity without requiring complex handling mechanisms
Data Source
AI summary
Disclosed herein is a wafer processing system for processing wafers one at a time, the wafer processing system including: a plurality of trays each configured to accommodate a wafer; a conveyor configured to transfer the wafers accommodated in the trays; first and second tray holding apparatuses arranged to be spaced from each other along the conveyor, the first and second tray holding apparatuses unloading the trays from the conveyor and loading the unloaded trays onto the conveyor; and first and second apparatuses provided for the first and second tray holding apparatuses, respectively, the first and second apparatuses including a processing unit configured to process the wafers transferred by the conveyor, and a loading/unloading unit configured to unload a wafer from or load a wafer onto one of the trays that is held by the first or second tray holding apparatus.