公开(公告)号：US20210230056A1

公开(公告)日：2021-07-29

申请号：US15734109

申请日：2019-05-31

Applicant: CORNING INCORPORATED

Inventor： Brian Sterling Chan ,  Yinghong Chen ,  Sumalee Likitvanichkul Fagan ,  Jun Hou ,  Qiao Li ,  Santona Pal ,  Rohit Rai

IPC: C03C21/00 ,  C03C4/18 ,  C03C3/083 ,  C03C3/087 ,  C03C3/089 ,  C03C3/097

Abstract: A method of making strengthened articles that includes: providing articles comprising ion-exchangeable alkali metal ions and first and second primary surfaces; providing a bath comprising ion-exchanging alkali metal ions larger in size than the ion-exchangeable ions; and submersing the articles in the bath at a first ion-exchange temperature and duration to form strengthened articles. Each strengthened article comprises a compressive stress region. Further, the exchange rate of the ion-exchanging alkali metal ions is higher into the first primary surface than into the second primary surface. In addition, the submersing step is conducted such that a predetermined gap is maintained between the first primary surface of each of the articles.