公开(公告)号：US20220287195A1

公开(公告)日：2022-09-08

申请号：US17637929

申请日：2020-08-28

Applicant: CORNING INCORPORATED

Inventor： NAIGENG CHEN ,  MATTHEW WADE FENTON ,  TIMOTHY MICHAEL GROSS ,  YUHUI JIN ,  DHANANJAY JOSHI ,  KUAN-TING KUO ,  YOUSEF KAYED QAROUSH

IPC: H05K5/03 ,  B32B7/12 ,  B32B7/06 ,  B32B17/06 ,  B32B3/26 ,  H05K5/00

Abstract: Foldable apparatus can comprise a foldable substrate comprising a substrate thickness and a central portion positioned between a first portion and a second portion. The central portion can comprise a central thickness less than the substrate thickness. A first maximum tensile stress of a first tensile stress region in the first portion and a second maximum tensile stress of the second tensile stress region in the second portion can be less than a third maximum tensile stress of a central tensile stress region in the central portion. Ribbons can comprise a ribbon thickness and a central portion positioned between a first portion and a second portion. The central portion can comprise a first central compressive stress region and a second central compressive stress region. In some embodiments, methods of processing a ribbon can comprise masking the first portion, masking the second portion, and chemically strengthening the central portion.