US 11,940,682 B2
Flexible multi-layered cover lens stacks for foldable displays
Manivannan Thothadri, Mountain View, CA (US); Harvey You, Mountain View, CA (US); Helinda Nominanda, San Jose, CA (US); Neil Morrison, Seeheim-Jugenheim (DE); Daniel Paul Forster, San Jose, CA (US); and Arvinder Chadha, San Jose, CA (US)
Assigned to APPLIED MATERIALS, INC., Santa Clara, CA (US)
Filed by Applied Materials, Inc., Santa Clara, CA (US)
Filed on Jun. 16, 2020, as Appl. No. 16/902,388.
Claims priority of provisional application 62/867,144, filed on Jun. 26, 2019.
Prior Publication US 2020/0408956 A1, Dec. 31, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. G02F 1/1333 (2006.01); G02B 1/11 (2015.01); G02B 1/14 (2015.01)
CPC G02F 1/133331 (2021.01) [G02B 1/11 (2013.01); G02B 1/14 (2015.01); G02F 1/133305 (2013.01); G02F 2201/50 (2013.01); G02F 2202/28 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A flexible cover lens assembly, comprising:
a glass layer;
a wet hardcoat layer disposed on the glass layer, wherein the wet hardcoat layer comprises an acrylate, and wherein the acrylate comprises a radiation curable acrylate, aliphatic urethane acrylate, a copolymer thereof, an elastomer thereof, or any combination thereof;
an adhesion promotion layer disposed directly on the wet hardcoat layer, wherein the adhesion promotion layer comprises a material selected from the group consisting of silicon oxide, silicon carbide, silicon oxycarbide, silicon nitride, silicon oxynitride, silicon oxycarbide nitride, a dopant thereof, and any combination thereof, and wherein the adhesion promotion layer has a refractive index in a range from about 1.40 to about 1.55;
an anti-reflectance layer disposed directly on the adhesion promotion layer;
a dry hardcoat layer disposed directly on the anti-reflectance layer, wherein the dry hardcoat layer comprises a material selected from the group consisting of silicon carbide, silicon oxycarbide, silicon oxycarbide nitride, a dopant thereof, and any combination thereof, and wherein the dry hardcoat layer has:
a refractive index of about 1.42 to about 1.55;
a nano-indentation hardness in a range from about 1 GPa to about 5 GPa; and
a porosity of about 1% to about 8%; and
an anti-fingerprint coating layer disposed directly on the dry hardcoat layer;
wherein the flexible cover lens assembly has a critical strain of greater than 1% to about 15%.