Electronic device having selectively strengthened glass
First Claim
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1. An electronic device comprising:
- a housing;
a display positioned within the housing; and
a cover glass attached to the housing and defining;
an outward facing surface having;
a first amount of chemical strengthening; and
a first compressive layer extending along the outward facing surface and having a first peak compressive stress; and
an inward facing surface having;
a second amount of chemical strengthening that is less than the first amount of chemical strengthening and greater than zero; and
a second compressive layer extending along the inward facing surface and having a second peak compressive stress about equal to the first peak compressive stress.
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Abstract
Embodiments disclosed therein generally pertain to selectively strengthening glass. More particularly, techniques are described for selectively strengthening cover glass, which tends to be thin, for electronic devices, namely, portable electronic devices.
270 Citations
20 Claims
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1. An electronic device comprising:
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a housing; a display positioned within the housing; and a cover glass attached to the housing and defining; an outward facing surface having; a first amount of chemical strengthening; and a first compressive layer extending along the outward facing surface and having a first peak compressive stress; and an inward facing surface having; a second amount of chemical strengthening that is less than the first amount of chemical strengthening and greater than zero; and a second compressive layer extending along the inward facing surface and having a second peak compressive stress about equal to the first peak compressive stress. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An electronic device housing comprising:
a selectively chemically strengthened cover glass having; an outward facing surface having a first level of chemical strengthening and a first peak compressive stress; and an inward facing surface having; an inner portion having a second level of chemical strengthening that is greater than zero and less than the first level of chemical strengthening and having a second peak compressive stress that is about equal to the first peak compressive stress; and a peripheral portion surrounding the inner portion and having the second level of chemical strengthening. - View Dependent Claims (9, 10, 11)
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12. An electronic device comprising:
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a housing; and a cover glass coupled to the housing, defining an outward facing surface and an inward facing surface, and comprising; a first ion-exchanged region along the outward facing surface and having; a first compressive layer depth; and a first peak compressive stress; and a second ion-exchanged region along the inward facing surface and having; a second compressive layer depth less than the first compressive layer depth; and a second peak compressive stress about equal to the first peak compressive stress. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification