US-12628529-B2 - Window, display device including the same and method for manufacturing the window

Abstract

A window includes a glass substrate having a plurality of first portions and a plurality of second portions. The plurality of first and second portions are alternately arranged with each other along a first direction. An upper surface of each of the plurality of first portions includes a first depressed pattern of a plurality of first depressed patterns defined therein. A first length in the first direction of each of the plurality of first depressed patterns is in a range of about 20 nm to about 2000 nm. A crystal content of each of the plurality of second portions is greater than a crystal content of each of the plurality of first portions.

Inventors

• Jaeho Lee
• Jun Hak OH
• Jeong Seok Lee

Assignees

• SAMSUNG DISPLAY CO., LTD.

Dates

Publication Date

20260512

Application Date

20231020

Priority Date

20230105

Claims (20)

1. 1 . A window, comprising: a glass substrate that includes a plurality of first portions and a plurality of second portions, the plurality of first and second portions are alternately arranged with each other along a first direction, wherein an upper surface of each of the plurality of first portions includes a first depressed pattern of a plurality of first depressed patterns defined therein, wherein a first length in the first direction of each of the plurality of first depressed patterns is in a range of about 20 nm to about 2000 nm, wherein a crystal content of each of the plurality of second portions is greater than a crystal content of each of the plurality of first portions.
2. 2 . The window of claim 1 , wherein a crystal content of the glass substrate is in a range of about 20% to about 80%.
3. 3 . The window of claim 1 , wherein a ratio of a spacing in the first direction between adjacent ones of the plurality of first portions to the first length is in a range of about 0.7 to about 1.3.
4. 4 . The window of claim 1 , wherein a lower surface of each of the plurality of first portions that is opposite to the upper surface of each of the plurality of first portions includes a second depressed pattern of a plurality of second depressed patterns defined therein, wherein a second length in the first direction of each of the plurality of second depressed patterns is in a range of about 20 nm to about 2000 nm.
5. 5 . The window of claim 1 , wherein an outer surface of the glass substrate is an outermost surface of the window.
6. 6 . The window of claim 1 , wherein the glass substrate includes one compound selected from LiAl(SiO) 2 , LiAlSi 4 O 10 , and Li 2 Si 2 O 5 .
7. 7 . The window of claim 6 , wherein a Si atomic ratio relative to a total composition of each of the plurality of first portions is different from a Si atomic ratio relative to a total composition of each of the plurality of second portions.
8. 8 . The window of claim 1 , wherein each of the plurality of second portions includes one compound selected from P 2 O 5 , TiO 2 , and ZrO 2 .
9. 9 . A display device comprising: a display module; and a window disposed on the display module, the window including a glass substrate, wherein the glass substrate includes a plurality of first portions and a plurality of second portions, the plurality of first and second portions are alternately arranged with each other along a first direction, wherein an upper surface of each of the plurality of first portions includes a first depressed pattern of a plurality of first depressed patterns defined therein, wherein a first length in the first direction of each of the plurality of first depressed patterns is in a range of about 20 nm to about 2000 nm, wherein a crystal content of each of the plurality of second portions is greater than a crystal content of each of the plurality of first portions.
10. 10 . The display device of claim 9 , wherein at least a portion of natural light incident on a first portion of the plurality of first portions or a second portion of the plurality of second portions is Mie-scattered at the first portion or the second portion.
11. 11 . The display device of claim 9 , wherein the glass substrate does not include MgF 2 or MgO.
12. 12 . A method for manufacturing a window, the method comprising: providing a pre-glass substrate including a plurality of first pre-portions and a plurality of second pre-portions, the plurality of first and second pre-portions are alternately arranged with each other along a first direction, and forming a first depressed pattern of a plurality of first depressed patterns in an upper surface of each of the plurality of first pre-portions, thereby forming a glass substrate, wherein a crystal content of each of the plurality of first pre-portions is lower than a crystal content of each of the plurality of second pre-portions, wherein a first length in the first direction of each of the plurality of first depressed patterns is in a range of about 20 nm to about 2000 nm.
13. 13 . The method of claim 12 , wherein the providing of the pre-glass substrate includes providing a glass composition, wherein the glass composition includes a base material and a nucleating agent, wherein the base material includes one compound selected from LiAl(SiO) 2 , LiAlSi 4 O 10 , and Li 2 Si 2 O 5 , wherein the nucleating agent includes one compound selected from P 2 O 5 , TiO 2 , and ZrO 2 .
14. 14 . The method of claim 13 , wherein a weight percentage of the nucleating agent relative to a total weight of the glass composition is in a range of about 1 wt % to about 10 wt %.
15. 15 . The method of claim 13 , wherein the providing of the pre-glass substrate further includes partially crystallizing the glass composition after the providing of the glass composition is performed.
16. 16 . The method of claim 15 , wherein the partially crystallizing of the glass composition includes a nucleation step and a crystal growth step, wherein the nucleation step is performed at a temperature in a range of about 500° C. to about 700° C., wherein the crystal growth step is performed at a temperature in a range of about 600° C. to about 900° C.
17. 17 . The method of claim 12 , wherein: the forming of the glass substrate includes performing a wet etching process on a surface of the pre-glass substrate, wherein the wet etching process includes applying etchant on the pre-glass substrate.
18. 18 . The method of claim 17 , wherein the etchant includes at least one compound selected from nitric acid, ammonium fluoride, phosphoric acid, and hydrochloric acid.
19. 19 . The method of claim 17 , wherein an etch rate at which the plurality of first pre-portions is etched by the etchant is greater than an etch rate at which the plurality of second pre-portions is etched by the etchant.
20. 20 . The method of claim 17 , wherein: the forming of the glass substrate includes chemical strengthening of the pre-glass substrate, wherein the chemical strengthening of the pre-glass substrate is performed after the wet etching process is performed or is performed after the providing of the pre-glass substrate is performed and before the wet etching process is performed.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2023-0001607, filed on Jan. 5, 2023 in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference in its entirety herein. 1. TECHNICAL FIELD Embodiments of the present disclosure described herein relate to a window, a display device including the window, and a method for manufacturing the window, and more particularly, relate to a window including a glass substrate including a first portion and a second portion having different crystal contents, a display device including the same, and a method for manufacturing the window. 2. DISCUSSION OF RELATED ART A display device is activated according to an electrical signal to display an image to a user. The display device may include a window, a housing, and an electronic element. The electronic element may include various elements activated according to an electrical signal, such as a display element, a touch element and/or a detection element. The window may be disposed on a front surface of the display device to protect the electronic element and to provide an active area to a user. The electronic element may be stably protected from external impact by the window. Accordingly, a method of reinforcing a window to exhibit increased strength and display quality is being studied. SUMMARY Embodiments of the present disclosure provide a window having increased durability and reduced reflectivity of external light. Further, embodiments of the present disclosure provide a display device including a window having reduced reflectivity of external light and thus having improved display quality. In an embodiment, a window includes a glass substrate having a plurality of first portions and a plurality of second portions. The plurality of first and second portions are alternately arranged with each other along a first direction. An upper surface of each of the plurality of first portions includes a first depressed pattern of a plurality of first depressed patterns defined therein. A first length in the first direction of each of the plurality of first depressed patterns is in a range of about 20 nm to about 2000 nm. A crystal content of each of the plurality of second portions is greater than a crystal content of each of the plurality of first portions. In an embodiment, a crystal content of the glass substrate may be in a range of about 20% to about 80%. In an embodiment, a ratio of a spacing in the first direction between adjacent ones of the plurality of first portions to the first length may be in a range of about 0.7 to about 1.3. In an embodiment, a lower surface of each of the plurality of first portions that is opposite to the upper surface of each of the plurality of first portions includes a second depressed pattern of a plurality of second depressed patterns defined therein. A second length in the first direction of each of the plurality of second depressed patterns may be in a range of about 20 nm to about 2000 nm. In an embodiment, an outer surface of the glass substrate may be defined as an outermost surface of the window. In an embodiment, the glass substrate may include one compound selected from LiAl(SiO)2, LiAlSi4O10, and Li2Si2O5. In an embodiment, a Si atomic ratio relative to a total composition of each of the plurality of first portions may be different from a Si atomic ratio relative to a total composition of each of the plurality of second portions. In an embodiment, each of the plurality of second portions may include one compound selected from P2O5, TiO2, and ZrO2. In an embodiment, a display device includes a display module. A window is disposed on the display module. The window includes a glass substrate. The glass substrate may include a plurality of first portions and a plurality of second portions. The plurality of first and second portions are alternately arranged with each other along a first direction. An upper surface of each of the plurality of first portions includes a first depressed pattern of a plurality of first depressed patterns defined therein. A first length in the first direction of each of the plurality of first depressed patterns may be in a range of about 20 nm to about 2000 nm. A crystal content of each of the plurality of second portions may be greater than a crystal content of each of the plurality of first portions. In an embodiment, at least a portion of natural light incident on the first portion or the second portion may be Mie-scattered at the first portion or the second portion. In an embodiment, the glass substrate may not include MgF2 or MgO. In an embodiment, a method for manufacturing a window may include providing a pre-glass substrate including a plurality of first pre-portions and a plurality of second pre-portions. The plurality of first and second pre-portions are alternately arranged with each other along a first direction. A first depressed patt