Vacuum Processing System Layout for High Productivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vacuum processing systems for semiconductor substrates do not optimize productivity per footprint, leading to inefficient wafer processing and increased risk of particle generation and cross-contamination.
Innovation Solution
A vacuum processing system comprising an atmospheric transfer chamber, a lock chamber, multiple vacuum transfer chambers, and vacuum processing chambers, where the number of processing chambers connected to each transfer chamber is strategically optimized to enhance transfer efficiency and minimize contamination, with transfer robots in each chamber managing the flow through multiple arms to utilize specific chambers effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple vacuum processing chambers are connected in series via transfer mechanisms disposed within multiple vacuum transfer chambers, then the processing efficiency and productivity per footprint are improved, but the system complexity and arrangement optimization become insufficient
Solution Approach 1:
The vacuum processing system is segmented into multiple independent vacuum transfer chambers (first, second, third transfer chambers) with distinct functions. Each transfer chamber handles specific transfer tasks between different processing chambers, allowing independent optimization and operation of each segment, thereby managing system complexity while maintaining high productivity.
Solution Approach 2:
The third vacuum transfer chamber serves as an intermediary chamber between the first and second transfer chambers. This intermediary structure enables flexible wafer routing and transfer operations, allowing the system to optimize processing sequences without directly coupling all processing chambers, thus reducing overall system complexity while enhancing productivity.
2Productivity
If the number of vacuum processing chambers is increased to improve productivity, then the output per unit time increases, but the footprint area and arrangement optimization become problematic
Solution Approach 1:
The system transitions from a linear or planar arrangement of processing chambers to a three-dimensional configuration utilizing multiple vertical levels (first, second, and third transfer chambers at different positions). This dimensional change allows multiple processing chambers to be packed into a smaller footprint area while maintaining high connectivity and transfer efficiency, thereby increasing productivity without proportionally increasing the footprint area.
3Speed
If transfer robots with multiple arms are used to enhance wafer transfer efficiency, then the processing speed increases, but the risk of particle generation and cross-contamination increases
Solution Approach 1:
The transfer robot system is segmented into multiple independent robotic arms (first, second, and third arms) operating in separate transfer chambers. Each arm operates independently within its designated chamber, reducing the risk of cross-contamination between arms. The segmentation allows high-speed transfer while maintaining cleanroom standards by isolating potential particle generation sources.
Solution Approach 2:
The third vacuum transfer chamber acts as an intermediary zone where wafers can be transferred between the first and second transfer chambers through controlled pathways. This intermediary structure enables rapid wafer movement while providing additional containment barriers that prevent particle generation in one chamber from affecting other chambers, thus maintaining clean transfer conditions at high speeds.
Data Source
AI summary
A vacuum processing apparatus which includes an atmospheric transfer chamber having a plurality of cassette stands for transferring a wafer, a lock chamber for storing the wafer, a first vacuum transfer chamber to which the wafer from the lock chamber is transferred, a transfer intermediate chamber connected to the first vacuum transfer chamber, and a second vacuum transfer chamber connected to the transfer intermediate chamber. At least one vacuum processing chamber is connected to the first vacuum transfer chamber, and two or more vacuum processing chambers are connected to a rear side of the second vacuum transfer chamber. A plurality of gate valves are disposed between the first vacuum transfer chamber and each of the lock chamber, the transfer intermediate chamber, and the vacuum processing chamber coupled to the first vacuum transfer chamber. A control unit is also provided for controlling operation of the gate valves.