Apparatus of manufacturing display device and method of manufacturing display device

A method of manufacturing a display device, comprising:

• providing a work substrate on a first stage, the work substrate comprising:
• a mother substrate comprising a plurality of display units, each of the display units comprising a display area, and a pad area;
• and
• a work protective film attached to the mother substrate, and comprising a display film portion corresponding to the display area, and a pad film portion corresponding to the pad area;
• cutting the work substrate to divide the work substrate into a plurality of cell units, each of the cell units comprising one display unit from among the plurality of display units, and a protective film unit of the work protective film, the protective film unit corresponding to the one display unit;
• transferring the cell units to a second stage using a transfer unit, the transfer unit comprising:
• a body member;
• a plurality of pins along a first direction on a first surface of the body member;
• and
• a plurality of suction pads on the first surface of the body member along a second direction crossing the first direction;
• attaching a peeling tape to the pad film portion of the cell units by descending the pins vertically;
• and
• peeling off the pad film portion of the cell units attached to the peeling tape by ascending the transfer unit or the pins.