Processing apparatus

A processing apparatus comprising:

• a chuck table for holding a workpiece that has a mark representing a crystal orientation on a holding surface thereof;
• a processing unit for grinding the workpiece held on the chuck table with grindstones or polishing the workpiece held on the chuck table with a polishing pad;
• a cassette stage for placing thereon a cassette for storing a plurality of workpieces on respective plurality of shelves therein;
• a temporary rest table for temporarily placing a workpiece thereon;
• a spinner table for holding a workpiece to be cleaned thereon;
• a robot for delivering a workpiece from the cassette placed on the cassette stage to the temporary rest table or delivering a workpiece held on the spinner table into the cassette placed on the cassette stage;
• a determining section, included in a control unit, for determining whether a workpiece has been properly processed or has not been properly processed;
• and
• the control unit for performing a control process for orienting the mark of the workpiece in a predetermined angular direction in an X-Y plane, responsive to the determining section determining that the workpiece has been properly processed, and storing the workpiece in a select shelf in the cassette in the predetermined angular direction on the X-Y plane, and performing a control process for orienting the mark of the workpiece in an angular direction in the X-Y plane different from the predetermined angular direction, responsive to the determining section determining that the workpiece has not been properly processed, and storing the workpiece in the select shelf in the cassette in the angular direction different from the predetermined angular direction.