Buffer Station Thermal Control Semiconductor Substrates
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Solution Overview
Problem
The throughput of semiconductor substrates in processing systems is limited by the time spent in processing and transferring between vacuum and atmospheric conditions, with existing methods not efficiently managing thermal control and storage during transfer between vacuum transfer modules.
Innovation Solution
A buffer station with a lower pedestal for heating or cooling and storage shelves, interfacing with vacuum transfer modules to perform thermal operations and store substrates, allowing quicker access and processing by enabling in-transit processing and storage of substrates, including broken ones without interrupting the processing line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If semiconductor substrates are transferred between vacuum transfer modules without intermediate thermal control, then the transfer process is simple and quick, but the substrates cannot be pre-heated or cooled to optimal processing temperatures, reducing overall processing efficiency
Solution Approach 1:
The buffer station performs preliminary thermal conditioning (heating or cooling) of semiconductor substrates during the transfer process between vacuum transfer modules. The lower pedestal in the buffer chamber applies thermal treatment to substrates before they reach the destination module, eliminating the need for separate thermal processing steps and thereby increasing throughput without extending total processing time.
2Reliability
If broken substrates are removed from the processing line, then quality control is improved, but the processing line is interrupted and throughput decreases
Solution Approach 1:
The buffer station serves as an intermediary chamber between vacuum transfer modules, providing a temporary holding area where broken substrates can be identified and removed without interrupting the main processing line. Good substrates continue to be transferred and processed while defective ones are isolated in the buffer chamber, maintaining continuous flow and throughput while ensuring quality control.
3Productivity
If multiple substrates are stored and transferred simultaneously, then throughput increases, but the complexity of thermal management and coordination between modules increases
Solution Approach 1:
The buffer station is designed as a multi-functional unit that combines thermal conditioning (heating/cooling), substrate storage, and quality inspection capabilities in a single chamber. The lower pedestal can handle multiple substrates simultaneously, and the buffer chamber provides a universal interface for both vacuum transfer modules, enabling parallel processing and reducing system complexity despite increased throughput requirements.
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
The buffer station increases throughput by performing thermal operations during transfer, allowing quicker access to substrates and removing broken substrates without interrupting the processing line, thereby optimizing the processing time and efficiency.
Implementation Method 1
The lower pedestal is operable to perform a heating or cooling operation on the semiconductor substrate received thereon
Implementation Method 2
The lower pedestal is operable to perform a heating or cooling operation on the semiconductor substrate received thereon
Data Source
AI summary
A buffer station for thermal control of semiconductor substrates in a semiconductor substrate processing system is configured to interface with first and second vacuum transfer modules of the system so as to allow substrates to be transferred therebetween. The buffer station comprises a first vacuum transfer module interface configured to allow substrates to be transferred between the first vacuum transfer module and the buffer station, and a second transfer module interface configured to allow substrates to be transferred between the second vacuum transfer module and the buffer station. At least one buffer chamber between the first and second vacuum transfer module interfaces includes a lower pedestal configured to receive a substrate on a support surface thereof. One or more semiconductor substrate storage shelves are above the lower pedestal. Each shelf is configured to receive a substrate from the first or second vacuum transfer module and store the respective substrate thereon.