IP Library Granted Patent US 12696664
Granted Patent B2
US 12696664 · App. 18/191,769 · Granted Jul 28, 2026

Mother glass protective film and method for manufacturing display device

Inventors: Kyungmin Choi (Yongin-si, KR); Hyochang Kim (Yongin-si, KR); Byeongkyu Park (Yongin-si, KR); Sunhaeng Cho (Yongin-si, KR)
Assignee: Samsung Display Co., Ltd.
H10K59/873H10K71/50
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Quick Facts
Patent No.
US 12696664
App. No.
18/191,769
Granted
Jul 28, 2026
Kind
B2
Abstract

A mother glass protective film having a plurality of cell film regions defined along a first direction, and a connection region adjacent to the plurality of cell film regions, includes: a carrier film; and a panel protective film on the carrier film, and having a first opening overlapping with at least the plurality of cell film regions.

Claims (36)

1 . A mother glass protective film having a plurality of cell film regions defined along a first direction, and a connection region adjacent to the plurality of cell film regions, the mother glass protective film comprising:

a carrier film; and

a panel protective film on the carrier film, and having a first opening overlapping with at least the plurality of cell film regions,

wherein the panel protective film comprises a first end, and a second end spaced from the first end in the first direction with the plurality of cell film regions between the first end and the second end, and

wherein the first opening extends from the first end to the second end across the plurality of cell film regions.

2 . The mother glass protective film of claim 1 , wherein the carrier film covers a lower surface of the panel protective film.

3 . The mother glass protective film of claim 1 , wherein the first opening extends in the first direction.

4 . The mother glass protective film of claim 1 , wherein the first opening has a width of 0.5 mm to 2 mm in a second direction crossing the first direction.

5 . The mother glass protective film of claim 1 , wherein a depth of the first opening is equal to a thickness of the panel protective film.

6 . The mother glass protective film of claim 1 , wherein the carrier film and the panel protective film each independently comprises at least one of polyimide or polyethylene terephthalate.

7 . The mother glass protective film of claim 1 , further comprising an adhesive layer on the panel protective film.

8 . The mother glass protective film of claim 7 , wherein the adhesive layer has a second opening corresponding to the first opening.

9 . The mother glass protective film of claim 1 , wherein the carrier film has a plate shape that is parallel to the first direction, and a second direction crossing the first direction.

10 . A mother glass protective film comprising:

a carrier film;

a panel protective film on the carrier film, and having at least one first opening extending in a first direction; and

an adhesive layer on the panel protective film, and having a second opening corresponding to the first opening,

wherein the panel protective film comprises a first end, and a second end spaced from the first end in the first direction with a plurality of cell film regions between the first end and the second end, and

wherein the first opening extends from the first end to the second end across the plurality of cell film regions.

11 . A method for manufacturing a display device, comprising:

providing a work panel comprising:

a plurality of cell regions arranged along a first direction, each of the cell regions including a first region, a bending region, and a second region sequentially defined along a second direction crossing the first direction; and

a peripheral region adjacent to the plurality of cell regions;

disposing a work protective film below the work panel, the work protective film having a first opening extending in the first direction to commonly overlap with at least the bending region of each of the plurality of cell regions; and

cutting the work panel along a cutting line between the plurality of cell regions and the peripheral region.

12 . The method of claim 11 , wherein the work protective film comprises:

a carrier film; and

a panel protective film on the carrier film, and having the first opening.

13 . The method of claim 12 , wherein the carrier film covers a lower surface of the panel protective film.

14 . The method of claim 12 , wherein the panel protective film comprises:

a first end; and

a second end spaced from the first end in the first direction, and

wherein the first opening extends from the first end to the second end.

15 . The method of claim 12 , wherein the work protective film further comprises an adhesive layer on the panel protective film, and

wherein, in the disposing of the work protective film, the work panel and the adhesive layer are in contact with each other.

16 . The method of claim 15 , wherein the adhesive layer has a second opening corresponding to the first opening.