Patent ID: 7665049
Filing Date: 2010-02-16
Classification: G05B,H01L,Y02P

Abstract:
1. A method for enabling reference to manufacturing information particular to a semiconductor integrated circuit device, the method comprising: preparing a semiconductor integrated circuit device including a plurality of identification elements configured to have the same shape as one another through the same manufacturing process; performing a measurement with respect to said semiconductor integrated circuit device at one timing during a process of manufacturing said semiconductor integrated circuit device to provide first information which reflects variations among physical values of said plurality of identification elements caused during the manufacturing process; storing second information including management information with respect to the manufacturing of said semiconductor integrated circuit device by relating to said first information in an information holding device external to said semiconductor integrated circuit device; performing another measurement with respect to said semiconductor integrated circuit device at another timing later than said one timing to provide third information which reflects variations among the physical values of said plurality of identification elements caused during the manufacturing process; and retrieving, by using said third information as a retrieving key, said second information from said information holding device in which said second information is stored with reference to said third information.