Method of manufacturing display apparatus including polarization film and protective film
A display apparatus includes a display layer located on a surface of a substrate and including a plurality of pixels, a thin-film encapsulation layer located on the display layer, the thin-film encapsulation layer including at least one inorganic layer and at least one organic layer, a polarization film located on the thin-film encapsulation layer, and a protective film located on another surface of the substrate, which is opposite to the surface of the substrate, the protective film corresponding to the display layer. A difference between a coefficient of thermal expansion of the polarization film and a coefficient of thermal expansion of the protective film is in a range of about 0 μm/° C. to about 5 μm/° C.
1 . A method of manufacturing a display apparatus, the method comprising:
forming a plurality of display portions on a surface of a mother substrate;
forming a polarization film covering the plurality of display portions;
forming a protective film on another surface of the mother substrate, which is opposite to the surface of the mother substrate; and
cutting the mother substrate to separate the mother substrate into a plurality of display apparatuses,
wherein a difference between a coefficient of thermal expansion of the polarization film and a coefficient of thermal expansion of the protective film is in a range of about 0 μm/° C. to about 5 μm/° C., and
wherein each of the plurality of display portions includes a display layer, and a thin-film encapsulation layer covering an upper surface and a side surface of the display layer, and
the polarization film covers an upper surface and a side surface of the thin-film encapsulation layer of each of the plurality of display portions.
2 . The method of claim 1 , further comprising:
etching the mother substrate before the forming of the protective film.
3 . The method of claim 2 , wherein the forming of the polarization film is performed before or after the etching of the mother substrate.
4 . The method of claim 1 , wherein the forming of the polarization film comprises:
forming a plurality of preliminary polarization films which respectively correspond to the plurality of display portions and are separated from each other on the mother substrate; and
removing outer regions of the plurality of preliminary polarization films.
5 . The method of claim 4 , wherein the removing of the outer regions of the plurality of preliminary polarization films is performed after the cutting of the mother substrate.
6 . The method of claim 4 , wherein the removing of the outer regions of the plurality of preliminary polarization films includes using a laser to remove the outer regions of the plurality of preliminary polarization films.
7 . The method of claim 1 , wherein the forming of the polarization film comprises:
forming, on the mother substrate, a single-body type preliminary polarization film; and
leaving a first region of the single-body type preliminary polarization film, the first region corresponding to the plurality of display portions, and removing a second region of the single-body type preliminary polarization film, the second region being a remaining region other than the first region.
8 . The method of claim 7 , further comprising:
cutting the mother substrate after the removing of the second region of the single-body type preliminary polarization film.
9 . The method of claim 1 , wherein the protective film comprises a thermosetting resin or an ultraviolet (UV) curing resin.
10 . The method of claim 1 , wherein a thickness of the mother substrate is in a range of about 0.1 mm to about 0.4 mm.
11 . The method of claim 1 , wherein the protective film is formed as a plurality of separated patterns on the another surface of the mother substrate.
12 . The method of claim 11 , wherein the protective film has a quadrangular shape, a circular shape, or a shape of a plurality of line patterns.
13 . The method of claim 11 , wherein the protective film comprises a material having a greater coefficient of thermal expansion than the coefficient of thermal expansion of the polarization film.