SEMICONDUCTOR MANUFACTURING APPARATUS, ABNORMALITY DETECTION IN SUCH SEMICONDUCTOR MANUFACTURING APPARATUS, METHOD FOR SPECIFYING ABNORMALITY CAUSE OR PREDICTING ABNORMALITY, AND RECORDING MEDIUM WHEREIN COMPUTER PROGRAM FOR EXECUTING SUCH METHOD IS

摘要

A two-axis coordinate system, in which two parameters to be monitored selected from a plurality of apparatus status parameters indicating a status of a semiconductor manufacturing apparatus are allocated to a first axis and a second axis, respectively, is prepared so as to detect an abnormality of the semiconductor manufacturing apparatus. As the parameters to be monitored, for example, a cumulative film thickness of a film forming process performed in the past by a film forming apparatus, and an open degree of a pressure adjusting valve provided in a vacuum exhaust path for controlling the pressure in a reactor vessel are selected. A value of the parameter to be monitored, which was obtained while the semiconductor manufacturing apparatus was normally operating in the past, is plotted on the two-axis coordinate system. A boundary between a normal status and an abnormal status is set around a plot group. A value of the parameter to be monitored, which is obtained while the semiconductor manufacturing apparatus is currently operating, is plotted on the two-axis coordinate system, and based on a positional relationship between the plot and the boundary, whether an abnormality is generated or not and a type of the abnormality are specified.