US 12,000,978 B2
Method for manufacturing window and method for manufacturing display device
Byoungyul Shim, Hwaseong-si (KR); Seungyo Yang, Suwon-si (KR); Jaeseung Jeon, Cheonan-si (KR); and Hyun Chul Jung, Cheonan-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed on Mar. 18, 2020, as Appl. No. 16/822,169.
Claims priority of application No. 10-2019-0052456 (KR), filed on May 3, 2019.
Prior Publication US 2020/0348452 A1, Nov. 5, 2020
Int. Cl. G02B 1/12 (2006.01); B23K 26/00 (2014.01); B23K 26/073 (2006.01); B23K 26/364 (2014.01); B23K 26/57 (2014.01); C03C 23/00 (2006.01); G02B 1/14 (2015.01); G06F 1/16 (2006.01)
CPC G02B 1/12 (2013.01) [B23K 26/364 (2015.10); B23K 26/57 (2015.10); G02B 1/14 (2015.01); G06F 1/1609 (2013.01); G06F 1/1626 (2013.01); B23K 26/00 (2013.01); B23K 26/073 (2013.01); C03C 23/0025 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for manufacturing a cover window, the method comprising:
forming a groove by irradiating first laser light to an edge of a first area defined on a bottom surface of a transparent member, wherein the first laser light removes a first portion of the transparent member at the bottom surface; and
forming a solid removable portion of the transparent member by irradiating second laser light, which is different from the first laser light and has a focus fixed at a depth of the groove of the transparent member, to the first area, wherein the second laser light passes through the transparent member at the bottom surface while removing a second portion of the transparent member at the depth of the groove, and wherein a first planar surface of the solid removable portion of the transparent member is formed by the first laser light and a second planar surface of the solid removable portion of the transparent member is formed by the second laser light; and
removing the solid removable portion to form the cover window.