公开(公告)号：US12043570B2

公开(公告)日：2024-07-23

申请号：US17509503

申请日：2021-10-25

Applicant: UTI INC.

Inventor： Kukhyun Sunwoo ,  Tea Joo Ha ,  Jun Su Choi ,  Yoon Jin Choi

IPC: B32B15/04 ,  B32B17/06 ,  C03C4/18 ,  C03C21/00

CPC classification number: C03C21/002 ,  C03C4/18 ,  C03C2204/00

Abstract: Proposed are a flexible cover window for simultaneously improving strength characteristics and folding characteristics of a glass-based ultra-thin flexible cover window, and a method of manufacturing the same. A glass-based flexible cover window is configured such that a ratio of the intensity of replacing metal ions at the glass center to the intensity of replacing metal ions at the glass surface is 1:3 or greater. The present disclosure can provide a flexible cover window with improved window strength characteristics and folding characteristics by adjusting the depth (ion penetration depth) and the surface compressive stress of a tempered layer by performing a gradient tempering process including primary tempering, slimming, and secondary tempering.