A method of manufacturing a linear grid for a display panel, the method including: applying a material layer for the linear grid to a substrate; laminating a negative photoresist layer having a pattern of the linear grid to a target area within an entire area of the material layer; laminating a positive photoresist layer to the entire area of the material layer; covering, with a mask for blocking ultraviolet light, areas within the entire area not including the target area, and emitting the ultraviolet light; etching the material layer according to the negative photoresist layer exposed by the ultraviolet light; and forming the pattern of the linear grid on the material layer by removing the negative photoresist layer and the positive photoresist layer from the entire area.