Patent ID: 8314776

Claim:
A substrate processing apparatus including at least one processing chamber, the apparatus comprising: a display panel; a display control unit for performing a control for displaying at least screens necessary for a maintenance of the substrate processing apparatus and preset selecting buttons on the display panel; and a selecting unit for clicking the selecting buttons displayed on the display panel, wherein the display control unit arranges and displays, on a second display region of the display panel, one of the selecting buttons for selecting a screen among at least screens necessary for the maintenance of the substrate processing apparatus in an order of a time sequence in which the selecting buttons have been clicked so that the leftmost selecting button indicates the latest screen; and displays the screen selected by the one of the selecting buttons on a first display region of the display panel, and the display control unit displays the second display region along one side of the first display region; displays each selecting button on the second display region in a fixed length; leaves out, when an entire length of the selecting buttons exceeds a length of the second display region, an excess portion of the selecting buttons from the second display region and saves the excess portion as history; and displays the excess portion again on the second display region when a display thereof becomes possible.