Patent ID: 6751517
Filing Date: 2004-06-15
Classification: H01L

Abstract:
A method for finding contamination occurrence in a process flow, comprising the following steps:inputting, through a network, a tool database representative of tools, the tool database including a set of contamination information for each tool to define that the pertaining tool is a contaminated tool or an uncontaminated tool; inputting, using a computer, a process database including the order of steps in the process flow, the process database having a tool information for each step, the tool information including at least one tool to be executed during the relevant step of the process flow without including the contamination information of each tool; and cross-examining, using a computer, the process database associated with the tool database to display a contamination warning message if one of the steps executed by a contaminated tool is executed prior to one of the steps executed by an uncontaminated tool in the process flow.