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1. (WO2018102332) STRENGTHENED GLASS-BASED ARTICLES AND METHODS FOR REDUCING WARP IN STRENGTHENED GLASS-BASED ARTICLES

Pub. No.:    WO/2018/102332    International Application No.:    PCT/US2017/063574
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Thu Nov 30 00:59:59 CET 2017
IPC: C03C 15/00
B24B 1/00
C03C 21/00
Applicants: CORNING INCORPORATED
Inventors: ABBOTT, John S., III
ALLAN, Douglas Clippinger
DAFIN, John Martin
FAGAN, Sumalee Likitavanichkul
WEIDMAN, David Lee
WILCOX, David Inscho
Title: STRENGTHENED GLASS-BASED ARTICLES AND METHODS FOR REDUCING WARP IN STRENGTHENED GLASS-BASED ARTICLES
Abstract:
Strengthened glass substrates and methods of reducing warp in strengthened glass substrates having 3D and 2.5D shapes are disclosed. In one embodiment, a strengthened glass-based article includes a first surface, a second surface opposite the first surface, and an edge between the first surface and the second surface. The edge is asymmetric with respect to a plane that is located at an average depth of the strengthened glass-based article and is parallel to the first surface and the second surface. The strengthened glass-based article has an expected warp WE based at least in part on a shape of the asymmetric edge of the strengthened glass-based article. An actual warp WA of the strengthened glass-based article is less than 85 % of the expected warp metric WE of the strengthened glass-based article. The actual warp WA of the strengthened glass-based article is measured with a concave surface facing up.