IP Library › Granted Patent US 11,229,131
Granted Patent B2
US 11,229,131 · App. 15/544,630 · Granted Jan 18, 2022

Enclosures having an anti-fingerprint surface

Inventors: Jaymin Amin (Corning, NY); Jaques Gollier (Redmond, WA); Shandon Dee Hart (Corning, NY); Karl William Koch, III (Elmira, NY); Wageesha Senaratne (Horseheads, NY)
Assignee: Corning Incorporated
H05K5/0217B24C1/00B24C1/04B24C3/322C03C3/083C03C3/091C03C15/00C03C19/00C03C21/002C09D5/00G06F1/1656H05K5/0086C03C2218/31
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Quick Facts
Patent No.
US 11,229,131
App. No.
15/544,630
Granted
Jan 18, 2022
Kind
B2
Abstract

Embodiments of an enclosure including a substrate having an anti-fingerprint surface are disclosed. The anti-fingerprint surface may include a textured surface, a coated surface or a coated textured surface that exhibits a low fingerprint visibility, when a fingerprint is applied to the anti-fingerprint surface. In one or more embodiments, the enclosure exhibits any one of the following attributes (1) radio, and microwave frequency transparency, as defined by a loss tangent of less than 0.03 and at a frequency range of between 15 MHz to 3.0 GHz; (2) infrared transparency; (3) a fracture toughness of greater than 0.6 MPa·m 1/2 ; (4) a 4-point bend strength of greater than 350 MPa; (5) a Vickers hardness of at least 450 kgf/mm 2 and a Vickers median/radial crack initiation threshold of at least 5 kgf; (6) a Young's Modulus in the range from about 50 GPa to about 100 GPa; and (7) a thermal conductivity of less than 2.0 W/m° C.

Claims (57)

1. An electronic device enclosure comprising:

a substrate comprising an anti-fingerprint surface comprises a textured surface comprising particles attached or bonded to the anti-fingerprint surface, the textured surface is oleophilic, and the textured surface comprises a RMS roughness height in the range from about 0.05 micrometers to about 10 micrometers,

wherein the anti-fingerprint surface exhibits a haze in the range of about 0.5% to about 40%,

wherein, when a fingerprint is applied to the anti-fingerprint surface, the anti-fingerprint surface exhibits a color shift of less than about 20, and

wherein the enclosure exhibits any one or more of:

radio and microwave frequency transparency, as defined by a loss tangent of less than 0.03 and at a frequency range of between 15 MHz to 3.0 GHz;

magnetic field transparency;

inductive field transparency; and

infrared transparency.

2. The electronic device enclosure of claim 1 , wherein the enclosure exhibits any one or more of:

a fracture toughness of greater than 0.60 MPam 1/2 ;

a 4-point bend strength of greater than 350 MPa;

a Vickers hardness of at least 450 kgf/mm 2 ;

a Vickers median/radial crack initiation threshold of at least 5 kgf;

a Young's Modulus in the range from about 50 GPa to about 100 GPa; and

a thermal conductivity of less than 2.0 W/m° C.

3. The electronic device enclosure of claim 2 , wherein the enclosure exhibits radio and microwave frequency transparency, as defined by a loss tangent of less than 0.015 at a frequency range of between 500 MHz to 3.0 GHz.

4. The electronic device enclosure of claim 2 , wherein the enclosure exhibits any one or more of

a fracture toughness of greater than 0.75 MPam 1/2 , and

a Young's Modulus in the range from about 50 GPa to about 75 GPa.

5. The electronic device enclosure of claim 2 , wherein the enclosure exhibits an 4-point bend strength of greater than 475 MPa.

6. The electronic device enclosure of claim 2 , wherein the enclosure exhibits a Vickers hardness of at least 500 kgf/mm 2 and Vickers median/radial crack initiation threshold of greater than 10 kgf.

7. The electronic device enclosure of claim 2 , wherein the enclosure exhibits a thermal conductivity of less than 1.5 W/m° C.

8. The electronic device enclosure of claim 1 , wherein the enclosure exhibits an average transmittance of about 80% or greater over a wavelength range from about 400 nm to about 750 nm.

9. The electronic device enclosure of claim 1 , wherein the enclosure exhibits an average transmittance of about 80% or greater over a wavelength range from about 750 nm to about 2000 nm.

10. The electronic device enclosure of claim 1 , wherein the substrate comprises an amorphous substrate or a crystalline substrate.

11. The electronic device enclosure of claim 1 , wherein the substrate is strengthened comprises any one or more of

a compressive surface layer having a depth of layer (DOL) greater than or equal to 20 μm,

a compressive stress greater than 400 MPa, and

a central tension of more than 20 MPa.

12. The electronic device enclosure of claim 10 , wherein the crystalline substrate comprises a strengthened glass ceramic substrate, a non-strengthened glass-ceramic, or a single crystal substrates.

13. The electronic device enclosure of claim 1 , further comprising an electronic device selected from a mobile phone, a tablet, a laptop, and a media player.

14. The electronic device enclosure of claim 1 , wherein the anti-fingerprint surface exhibits a visibility of less than about 0.95.

15. The electronic device enclosure of claim 1 , wherein the particles comprise an average major dimension in a range from 100 nanometers to about 2 micrometers.

16. The electronic device enclosure of claim 1 , wherein the textured surface comprises TiO 2 .

17. The electronic device enclosure of claim 1 , wherein the haze is in a range from about 10% to about 35%.

18. The electronic device enclosure of claim 1 , wherein the substrate comprises any one of a soda lime glass, an alkali aluminosilicate glass, or an alkali aluminoborosilicate glass, and the particles comprise the same material as the substrate.

19. The electronic device enclosure of claim 1 , wherein the particles comprise the same material as the substrate.

20. An electronic device enclosure comprising:

a substrate comprising an anti-fingerprint surface comprises a textured surface comprising particles attached or bonded to the anti-fingerprint surface, the textured surface is oleophilic,

wherein the anti-fingerprint surface exhibits a haze in the range from about 10% to about 35%,

wherein, when a fingerprint is applied to the anti-fingerprint surface, the anti-fingerprint surface exhibits a color shift of less than about 20, and

wherein the enclosure exhibits any one or more of:

radio and microwave frequency transparency, as defined by a loss tangent of less than 0.03 and at a frequency range of between 15 MHz to 3.0 GHz;

magnetic field transparency;

inductive field transparency; and

infrared transparency.

21. An electronic device enclosure comprising:

a substrate comprising an anti-fingerprint surface comprises a textured surface comprising particles attached or bonded to the anti-fingerprint surface, the textured surface is oleophilic,

wherein the particles comprise of the same material as the substrate,

wherein the anti-fingerprint surface exhibits a haze in the range of about 0.5% to about 40%,

wherein, when a fingerprint is applied to the anti-fingerprint surface, the anti-fingerprint surface exhibits a color shift of less than about 20, and

wherein the enclosure exhibits any one or more of:

radio and microwave frequency transparency, as defined by a loss tangent of less than 0.03 and at a frequency range of between 15 MHz to 3.0 GHz;

magnetic field transparency;

inductive field transparency; and

infrared transparency.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 19, 2017
From: AMIN, JAYMIN; GOLLIER, JACQUES; HART, SHANDON DEE; KOCH, KARL WILLIAM, III; SENARATNE, WAGEESHA
To: CORNING INCORPORATED
Reel/Frame 043042/0563 →
Continuity (2)
Provisional Application 62105004 · Jan 19, 2015
Related Publication 20180352668A1 · Dec 6, 2018