US 11,780,758 B2
Laminated and ion-exchanged strengthened glass laminates
Michael Thomas Gallagher, Painted Post, NY (US); Suresh Thakordas Gulati, Elmira, NY (US); Timothy James Kiczenski, Corning, NY (US); Robert Anthony Schaut, Horseheads, NY (US); and Natesan Venkataraman, Painted Post, NY (US)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Filed by CORNING INCORPORATED, Corning, NY (US)
Filed on Jun. 9, 2021, as Appl. No. 17/343,149.
Application 15/354,143 is a division of application No. 14/232,425, granted, now 9,522,836, issued on Dec. 20, 2016, previously published as PCT/US2012/047515, filed on Jul. 20, 2012.
Application 17/343,149 is a continuation of application No. 16/227,851, filed on Dec. 20, 2018, granted, now 11,059,736.
Application 16/227,851 is a continuation of application No. 15/354,143, filed on Nov. 17, 2016, granted, now 10,196,295, issued on Feb. 5, 2019.
Claims priority of provisional application 61/511,422, filed on Jul. 25, 2011.
Prior Publication US 2021/0292215 A1, Sep. 23, 2021
Int. Cl. C03B 17/02 (2006.01); B32B 17/06 (2006.01); C03B 23/20 (2006.01); C03B 29/02 (2006.01); C03C 21/00 (2006.01); C03C 3/085 (2006.01); C03C 3/087 (2006.01); C03C 3/091 (2006.01); C03C 3/093 (2006.01); C03C 4/18 (2006.01); C03B 17/06 (2006.01)
CPC C03B 17/02 (2013.01) [B32B 17/06 (2013.01); C03B 17/025 (2013.01); C03B 17/06 (2013.01); C03B 17/064 (2013.01); C03B 23/20 (2013.01); C03B 29/025 (2013.01); C03C 3/085 (2013.01); C03C 3/087 (2013.01); C03C 3/091 (2013.01); C03C 3/093 (2013.01); C03C 4/18 (2013.01); C03C 21/002 (2013.01); B32B 2307/30 (2013.01); C03C 2204/00 (2013.01); Y10T 428/24942 (2015.01); Y10T 428/2933 (2015.01)] 18 Claims
OG exemplary drawing
 
1. A strengthened laminated glass structure comprising:
a core glass layer having a first coefficient of thermal expansion (CTE);
a first clad glass layer laminated to a first surface of the core glass layer; and
a second clad glass layer laminated to a second surface of the core glass layer;
wherein each of the first clad glass layer and the second clad glass layer comprises an ion exchangeable glass having a second CTE that is lower than the first CTE of the core glass layer; and
wherein an ion-exchanged region of each of the first clad glass layer and the second clad glass layer is under a compressive stress that is enhanced relative to a compressive stress of a non-ion-exchanged region of the respective first clad glass layer and second clad glass layer;
wherein the enhanced compressive stress of the ion-exchanged region varies continuously with increasing depth of layer (DOL) from an outer surface of the respective first clad glass layer or second clad glass layer throughout a portion of each of the first and second clad glass layers; and
wherein the enhanced compressive stress increases with increasing DOL in a portion of the ion-exchanged region.
 
16. A strengthened laminated glass structure, comprising:
a core glass layer having a first coefficient of thermal expansion (CTE);
a first clad glass layer laminated to a first surface of the core glass layer; and
a second clad glass layer laminated to a second surface of the core glass layer,
wherein each of the first clad glass layer and the second clad glass layer comprises an ion exchangeable glass having a second CTE that is lower than the first CTE of the core glass layer;
wherein an ion-exchanged region of each of the first clad glass layer and the second clad glass layer is under a compressive stress that is enhanced relative to a compressive stress of a non-ion-exchanged region of the respective first clad glass layer and second clad glass layer;
wherein the enhanced compressive stress of the ion-exchanged region varies continuously with increasing depth of layer (DOL) from an outer surface of the respective first clad glass layer or second clad glass layer throughout a portion of each of the first and second clad glass layers; and
wherein the enhanced compressive stress inflects from decreasing to increasing with increasing DOL in a portion of the ion-exchanged region.
 
17. A strengthened laminated glass structure comprising:
a core glass layer having a first coefficient of thermal expansion (CTE);
a first clad glass layer laminated to a first surface of the core glass layer; and
a second clad glass layer laminated to a second surface of the core glass layer;
wherein each of the first clad glass layer and the second clad glass layer comprises an ion exchangeable glass having a second CTE that is lower than the first CTE of the core glass layer;
wherein an ion-exchanged region of each of the first clad glass layer and the second clad glass layer is under a compressive stress that is enhanced relative to a compressive stress of a non-ion-exchanged region of the respective first clad glass layer and second clad glass layer; and
wherein the enhanced compressive stress of the ion-exchanged region varies continuously with increasing depth of layer (DOL) from an outer surface of the respective first clad glass layer and second clad glass layer throughout each of the first and second clad glass layers.