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|Author(s):||Vinod Anandarajah; Naveen Kalappa; Julien L. Baboud; YaShian Li-Baboud; James Moyne;|
|Title:||Precise Time Synchronization in Semiconductor Manufacturing|
|Published:||October 03, 2007|
|Abstract:||In today's fabs, coordination of time-based information throughout the factory and enterprise has become necessary. This has driven the need to have time synchronization at all levels of the enterprise. Time synchronization protocols such as Network Time Protocol (NTP) and Precision Time Protocol (PTP) have been defined for performing synchronization over distributed systems. Lack of time synchronization among the various subsystems is seen as a factor of poor data quality in Equipment Data Acquisition (EDA) and Advanced Process Control (APC) analysis. The focus of our study is to investigate the extent and precision of time synchronization that can be practically applied with the available protocols at various levels of the semiconductor factory environment to meet next generation manufacturing requirements. To this end, we describe the objectives, details, and implementation of the simulator that aims to model a semiconductor factory network. This will provide a practical perspective to study the benefits and potential network factors contributing to accuracy degradation of factory-wide time synchronization.|
|Proceedings:||2007 International IEEE Symposium on Precision Clock Synchronization for Measurement, Control and Communication|
|Pages:||pp. 78 - 84|
|Dates:||October 1-3, 2007|
|Keywords:||Advanced Process Control,Data Quality,NTP,PTP,Time Synchronization|
|Research Areas:||Data and Informatics|
|PDF version:||Click here to retrieve PDF version of paper (5MB)|