Patent ID: 6577972
Filing Date: 2003-06-10
Classification: G05B,H01L,Y02P

Abstract:
A sampling inspection managing system for inspecting a selected lot in a inspection step in order to confirm the processing result of a processing step in a semiconductor device production line including plural processing steps and inspection steps, comprising:first means for setting whether each processing step is a step for determining sampling inspection frequency in a specific inspection step; second means for setting the inspection frequency in the specific inspection step for each kind of product to be processed for a processing step which has been set as â€œa step for determining the sampling inspection frequencyâ€  in said first means; third means for counting number of lots to be processed for each kind of product for the processing step which has been set as â€œa step for determining the sampling inspection frequencyâ€  in said first means; and fourth means for determining, based on the number of lots counted in said third means, whether each lot should be inspected in the specific inspection step, and for storing the determination as information for each lot, wherein said second means sets the inspection frequency so that a determination as to whether an â€œinspection is to be madeâ€  or â€œno inspection is to be madeâ€  is set at a frequency of once per n lots, where n is an integer.