A window manufacturing method includes providing a first adhesive on a dummy substrate, providing a first mother substrate on the first adhesive, disposing a first portion of an interleaving paper on a surface of a suction stage disposed on the first mother substrate, the surface of the suction stage facing the first mother substrate, and pressing the suction stage toward the first mother substrate to attach the first mother substrate to the dummy substrate.

A window manufacturing method includes providing a first adhesive on a dummy substrate, providing a first mother substrate on the first adhesive, disposing a first portion of an interleaving paper on a surface of a suction stage disposed on the first mother substrate, the surface of the suction stage facing the first mother substrate, and pressing the suction stage toward the first mother substrate to attach the first mother substrate to the dummy substrate.