US 11,943,960 B2
Light extracting substrate for organic light emitting diode
Songwei Lu, Wexford, PA (US)
Assigned to Vitro Flat Glass LLC, Cheswick, PA (US)
Filed by Vitro Flat Glass LLC, Cheswick, PA (US)
Filed on Feb. 28, 2020, as Appl. No. 16/804,146.
Application 16/804,146 is a division of application No. 13/364,898, filed on Feb. 2, 2012, granted, now 10,581,020.
Claims priority of provisional application 61/440,588, filed on Feb. 8, 2011.
Prior Publication US 2020/0203665 A1, Jun. 25, 2020
Int. Cl. H10K 50/854 (2023.01); G02B 5/02 (2006.01)
CPC H10K 50/854 (2023.02) [G02B 5/0221 (2013.01); G02B 5/0242 (2013.01); G02B 5/0268 (2013.01); G02B 5/0278 (2013.01); Y10T 29/49826 (2015.01); Y10T 29/49885 (2015.01)] 20 Claims
OG exemplary drawing
 
1. A method for making a light extraction substrate, comprising:
on a homogeneous glass substrate having a first surface and a second surface, providing:
a first light extraction region located in the first surface by depositing nanoparticles into the first surface; and
a second light extraction region on at least a portion of the second surface, the second light extraction region having a surface roughness of at least 10 nm,
wherein the first light extraction region and the second light extraction region provide haze in the range of 10% to 40%.