A method of manufacturing a cover window for a display panel, comprising: forming a first coating layer on an upper surface of a plastic layer; in a first step, performing mechanical processing on an edge of the plastic layer and an edge of the first coating layer to produce an intermediate edge having: a side part perpendicular to the upper surface of the plastic layer, and an initial first inclined part extending from the side part to the first coating layer; characterized by: in a second step after the first step, performing laser processing on the intermediate edge to produce a final edge having: the side part, a final first inclined part having a reduced size compared to the initial first inclined part, extending from the side part, a first parallel part on the plastic layer, the first parallel part extending, from the final first inclined part, parallel to the upper surface of the plastic layer, and a second inclined part extending from the first parallel part to the upper surface of the first coating layer wherein the first parallel part and the second inclined part are formed by the laser processing. forming a first coating layer on an upper surface of a plastic layer; in a first step, performing mechanical processing on an edge of the plastic layer and an edge of the first coating layer to produce an intermediate edge having: a side part perpendicular to the upper surface of the plastic layer, and an initial first inclined part extending from the side part to the first coating layer; characterized by: in a second step after the first step, performing laser processing on the intermediate edge to produce a final edge having: the side part, a final first inclined part having a reduced size compared to the initial first inclined part, extending from the side part, a first parallel part on the plastic layer, the first parallel part extending, from the final first inclined part, parallel to the upper surface of the plastic layer, and a second inclined part extending from the first parallel part to the upper surface of the first coating layer wherein the first parallel part and the second inclined part are formed by the laser processing. a side part perpendicular to the upper surface of the plastic layer, and an initial first inclined part extending from the side part to the first coating layer; characterized by: in a second step after the first step, performing laser processing on the intermediate edge to produce a final edge having: the side part, a final first inclined part having a reduced size compared to the initial first inclined part, extending from the side part, a first parallel part on the plastic layer, the first parallel part extending, from the final first inclined part, parallel to the upper surface of the plastic layer, and a second inclined part extending from the first parallel part to the upper surface of the first coating layer wherein the first parallel part and the second inclined part are formed by the laser processing. the side part, a final first inclined part having a reduced size compared to the initial first inclined part, extending from the side part, a first parallel part on the plastic layer, the first parallel part extending, from the final first inclined part, parallel to the upper surface of the plastic layer, and a second inclined part extending from the first parallel part to the upper surface of the first coating layer wherein the first parallel part and the second inclined part are formed by the laser processing.