US 12,481,316 B2
Foldable apparatus, foldable substrate, and methods of making
Shinu Baby, Painted Post, NY (US); Naigeng Chen, San Jose, CA (US); Timothy Michael Gross, Painted Post, NY (US); Jason Thomas Harris, Horseheads, NY (US); Dhananjay Joshi, Painted Post, NY (US); Yousef Kayed Qaroush, Painted Post, NY (US); Arlin Lee Weikel, Mansfield, PA (US); and Tingge Xu, Painted Post, NY (US)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Appl. No. 17/638,254
Filed by CORNING INCORPORATED, Corning, NY (US)
PCT Filed Aug. 28, 2020, PCT No. PCT/US2020/048507
§ 371(c)(1), (2) Date Feb. 25, 2022,
PCT Pub. No. WO2021/041882, PCT Pub. Date Mar. 4, 2021.
Claims priority of provisional application 63/022,748, filed on May 11, 2020.
Claims priority of provisional application 62/914,720, filed on Oct. 14, 2019.
Claims priority of provisional application 62/893,291, filed on Aug. 29, 2019.
Prior Publication US 2022/0291712 A1, Sep. 15, 2022
Int. Cl. G06F 1/16 (2006.01); G09F 9/30 (2006.01)
CPC G06F 1/1616 (2013.01) [G06F 1/1656 (2013.01); G09F 9/301 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A foldable apparatus comprising a foldable substrate foldable about an axis extending in a direction of a width of the foldable substrate, the foldable substrate further comprising:
a substrate thickness defined between a first major surface and a second major surface opposite the first major surface, wherein the foldable substrate is formed of an amorphous glass material;
a first portion comprising the substrate thickness and a first surface area of the first major surface;
a second portion comprising the substrate thickness and a third surface area of the first major surface; and
a central portion comprising a central thickness defined between a first central surface area and the second major surface opposite the first central surface area, the first central surface area attaching the first surface area to the third surface area, a width of the central portion, extending from the first portion to the second portion, is about 45 millimeters or less, and the central thickness is less than the substrate thickness,
wherein the central portion is positioned between the first portion and the second portion in a direction of a length of the foldable substrate that is perpendicular to the direction of the width of the foldable substrate, and the foldable apparatus comprises a neutral stress configuration when the foldable apparatus is in a bent configuration, wherein:
the foldable substrate of the foldable apparatus comprises an effective minimum bend radius in a range from about 1 millimeter to about 10 millimeters,
the width of the central portion is in a range from about 2.8 times the effective minimum bend radius to about 6 times the effective minimum bend radius,
the substrate thickness is in a range from about 125 micrometers to about 200 micrometers,
the central thickness is in a range from about 10 micrometers to about 40 micrometers, and
the substrate is chemically strengthened so that the first portion and the second portion each comprise a maximum tensile stress of about 100 MPa or less.