CPC C03C 21/002 (2013.01) [C03C 3/083 (2013.01); C03C 17/007 (2013.01); C03C 17/04 (2013.01); H01M 50/124 (2021.01); H01M 50/1245 (2021.01); C03C 2203/52 (2013.01); C03C 2217/77 (2013.01)] | 20 Claims |
1. A glass member for a housing of an electronic device, comprising:
an aluminosilicate glass substrate defining a first surface of the glass member, the first surface having a first average surface roughness (Ra) below 1 micron;
a fused composite coating bonded to a portion of the aluminosilicate glass substrate and comprising:
an amorphous glass matrix having a softening temperature that is lower than a softening temperature of the aluminosilicate glass substrate and a coefficient of thermal expansion that is greater than the coefficient of thermal expansion of the aluminosilicate glass substrate; and
crystalline particles having a softening temperature that is higher than the softening temperature of the amorphous glass matrix and a coefficient of thermal expansion that is less than the coefficient of thermal expansion of the amorphous glass matrix, the crystalline particles dispersed in the amorphous glass matrix and extending from a surface of the amorphous glass matrix, thereby defining a textured second surface of the glass member, the textured second surface having a second average surface roughness (Ra) between 1 micron and 10 microns;
a first ion-exchanged layer extending into the glass member and through the fused composite coating; and
a second ion-exchanged layer extending into the glass member from the first surface.
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