Electronic devices including laser-textured glass cover members
A laser-textured glass cover member suitable for use in an electronic device is disclosed. The laser-textured surface of the glass cover member may provide a smooth feel to an external surface of the electronic device without introducing a perceptible visual texture. Methods for making the laser-textured glass cover members are also disclosed.
1. An electronic device comprising:
an enclosure at least partially defining an internal volume of the electronic device, the enclosure including a cover assembly comprising:
a glass cover member defining:
an exterior surface and an interior surface; and
laser-formed features along the exterior surface and resulting from ablation and flow of the glass cover member, the laser-formed features defining peaks having a mean peak curvature (Ssc) from about 0.1 microns −1 to about 1.2 microns −1 ; and
a decorative coating disposed along the interior surface and viewable through the laser-formed features of the glass cover member.
2. The electronic device of claim 1 , wherein a root mean square surface slope of the laser-formed features (Sdq) is from about 0.1 to less than about 1.
3. The electronic device of claim 1 , wherein a ratio of an amplitude of the laser-formed features to a spacing of the peaks is from about 0.01 to about 0.2.
4. The electronic device of claim 3 , wherein:
the amplitude of the laser-formed features is characterized by a root mean square surface height (Sq); and
the spacing of the peaks is characterized by a mean pitch of the peaks.
5. The electronic device of claim 1 , wherein an external surface of the cover assembly has a gloss from about 1 to about 10 gloss units as measured at a 60 degree angle.
6. The electronic device of claim 1 , wherein the cover assembly further comprises a fluorinated coating disposed on the exterior surface of the glass cover member and having a thickness less than or equal to about 50 nm.
7. An electronic device, comprising:
an enclosure;
a display positioned at least partially within the enclosure;
a first glass cover member coupled to the enclosure and defining a transparent portion positioned over the display; and
a second glass cover member coupled to the enclosure and including a laser-textured surface defining an irregular set of hills and valleys, the irregular set of hills and valleys having:
a mean peak spacing from about 1 micron to about 15 microns; and
a root mean square surface height (Sq) from about 0.1 micron to about 1.5 microns.
8. The electronic device of claim 7 , wherein the root mean square surface height is less than or equal to about 1 micron.
9. The electronic device of claim 7 , wherein the mean peak spacing is from about 1 micron to about 10 microns.
10. The electronic device of claim 7 , wherein:
the second glass cover member is chemically strengthened; and
a compressive stress layer extends from the laser-textured surface into the second glass cover member.
11. The electronic device of claim 7 , further comprising an optically dense coating disposed along an interior surface of the second glass cover member.
12. The electronic device of claim 11 , wherein:
the electronic device is a mobile phone and further comprises:
a first cover assembly which defines a front side of the mobile phone and includes the first glass cover member; and
a second cover assembly which defines a rear side of the mobile phone and includes the second glass cover member.