A transfer device for handling microelectronic workpieces in an environment of a processing machine having a first set of processing stations in a first row and second set of processing stations in a second row, the transfer device comprising:
- means for transporting an arm linearly along a track between the first and second rows;
- means for moving the arm along a lift path transverse to the track to adjust an elevation of the arm;
- means for rotating the arm about the lift path;
- first holding means for holding a first workpiece at a first elevation relative to the arm and rotating the first workpiece relative to the arm, the first holding means being rotatably coupled to the arm;
- and
- second holding means for holding a second workpiece at a second elevation relative to the arm and rotating the second workpiece relative to the arm independently from the first holding means, the second elevation being different than the first elevation, and the second holding means being rotatably coupled to the arm.