US 11,670,639 B2
Flexible display substrate and preparation method thereof
Linshuang Li, Shenzhen (CN)
Assigned to Shenzhen China Star Optoelectronics Semiconductor Display Technology cO., lTD., Shenzhen (CN)
Appl. No. 16/627,366
Filed by Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Shenzhen (CN)
PCT Filed Nov. 8, 2019, PCT No. PCT/CN2019/116763
§ 371(c)(1), (2) Date Dec. 30, 2019,
PCT Pub. No. WO2021/082065, PCT Pub. Date May 6, 2021.
Claims priority of application No. 201911051669.2 (CN), filed on Oct. 31, 2019.
Prior Publication US 2021/0358966 A1, Nov. 18, 2021
Int. Cl. H01L 27/12 (2006.01); H01L 25/16 (2023.01); G09F 9/30 (2006.01); H01L 51/00 (2006.01); H01L 27/32 (2006.01)
CPC H01L 27/1218 (2013.01) [H01L 27/1262 (2013.01); H01L 51/0097 (2013.01); H01L 25/167 (2013.01); H01L 27/3244 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A flexible display device substrate comprising:
first flexible substrate;
a second flexible substrate disposed on the first flexible substrate; and
an interweaved structure layer disposed between the first flexible substrate and the second flexible substrate, wherein the interweaved structure layer is formed by a part of the first flexible substrate and a part of the second flexible substrate weaving and penetrating with each other,
a toughening layer, disposed at intervals between the first flexible substrate and the second flexible substrate, wherein the toughening layer is a layered structure,
wherein a portion of the toughening layer is embedded/sink into the first flexible substrate, the first flexible substrate surrounds a lower half of the toughening layer, and the second flexible substrate covers an upper half of the toughening layer,
a bonding strength between the first flexible substrate and the second flexible substrate in the interweaved structure layer is greater than 8.74N/cm, and
an optical transmissions of the first flexible substrate and the second flexible substrate are greater than 90%, a yellow indexes are less than 2, and a hazes are less than 1.