A method for manufacturing a display device includes providing a carrier substrate and forming a soluble layer on the carrier substrate. The soluble layer includes a material that, dissolves in a washing solution. The method includes forming a cover layer on a top surface of the soluble layer and a side surface of the soluble layer. The method includes forming a display panel on the cover layer. The display panel includes a base layer. The method includes removing a portion of the cover layer from the side surface of the soluble layer to form a remaining part. The method includes providing the washing solution to the soluble layer to remove the soluble layer. The method includes separating the display panel and the remaining part from the carrier substrate.