Device having reduced friction properties

• US 8,784,933 B2
• Filed: 02/26/2013
• Issued: 07/22/2014
• Est. Priority Date: 10/23/2009
• Status: Active Grant

• Current Assignee: Schott AG (Carl-Zeiss-Stiftung)
• Original Assignee: Schott AG (Carl-Zeiss-Stiftung)
• Inventors: Krzyak, Marta, Walther, Marten, Kracht, Peter
• Primary Examiner(s): Yuan, Dah-Wei D
• Assistant Examiner(s): Law, Nga Leung V
• Application Number:
  US13/777,467
• Publication Number:
  US 20130171344A1
• Time in Patent Office: 511 Days
• Field of Search: 427/140, 427/142
• US Class Current: 427/162
• CPC Class Codes: C03C 17/3417 all coatings being oxide coatings
• CPC Class Codes: C03C 17/42 at least one coating of an organic material and at least one non-metal coating
• CPC Class Codes: C03C 2217/425 consisting of a porous layer
• CPC Class Codes: C03C 2217/734 comprising an alternation of high and low refractive indexes
• CPC Class Codes: C03C 2217/76 Hydrophobic and oleophobic coatings
• CPC Class Codes: C03C 2218/365 Coating different sides of a glass substrate
• CPC Class Codes: C23C 18/1216 Metal oxides C23C18/1212 takes precedence
• CPC Class Codes: C23C 18/1225 Deposition of multilayers of inorganic material
• CPC Class Codes: C23C 18/1254 Sol or sol-gel processing
• CPC Class Codes: F21V 3/04 characterised by materials, surface treatments or coatings
• CPC Class Codes: G02B 1/115 Multilayers
• CPC Class Codes: Y10T 428/249953 Composite having voids in a component [e.g., porous, cellular, etc.]
• CPC Class Codes: Y10T 428/265 1 mil or less
• CPC Class Codes: Y10T 428/266 of base or substrate

Abstract

A device, in particular a cover panel for a display device or a monitor auxiliary panel or a surface for input devices, includes a substrate and a coating applied onto the substrate. The coating has a surface having a coefficient of friction in the range between approximately 0.01 and 0.12, in particular between approximately 0.02 and 0.1, or between approximately 0.03 and 0.09.

Claims

1. A method to produce a cover panel for one of a display device, a monitor front panel, and a surface for inputs, the method comprising the steps of:

providing a substrate;

applying an anti-reflective coating onto said substrate according to a liquid technology, said anti-reflective coating having three individual layers including a titanium dioxide layer, a silicon dioxide layer and a layer including silicon dioxide and titanium dioxide;

introducing said substrate coated with said anti-reflective coating into a pressure vessel set to a vacuum in a range of between approximately 10 Pascals (Pa) to 1050 hectopascals (hPa); and

applying a cover layer onto said anti-reflective coating such that a coefficient of friction is between approximately 0.01 and 0.12.

2. The method according to claim 1, wherein said liquid technology is a sol-gel technology.

3. The method according to claim 2, further comprising the step of applying said anti-reflective coating onto said substrate as a multi-layer interference coating, including between three and seven layers.

4. The method according to claim 3, wherein said multi-layer interference coating is a three layer interference coating including a first layer having a refractive index between 1.6 and 1.8, a second layer having a refractive index between approximately 1.9 and 2.5and a third layer having a refractive index between approximately 1.4 and 1.5.

5. The method according to claim 1, wherein said pressure vessel is set to between approximately 10 hPa to 500 hPa.

6. The method according to claim 1, wherein said vacuum is one of a fine vacuum in a range between approximately 10 Pa and 100 Pa and a low vacuum above 100 Pa, said vacuum being evacuated.

7. The method according to claim 1, wherein said coefficient of friction is between approximately 0.02 and 0.1.

8. The method according to claim 7, wherein said coefficient of friction is between approximately 0.03 and 0.09.

9. The method according to claim 1, further comprising the step of putting an ultra-hydrophobic coating material into a vaporizer located in said pressure vessel and evaporating and subsequently precipitating said ultra-hydrophobic coating material onto a surface of one of said substrate and said coating such that said one of said substrate and said coating has a coefficient of friction between approximately 0.01 and 0.12.

10. The method according to claim 9, wherein said ultra-hydrophobic coating material is precipitated onto said at least one anti-reflective coating in a form of said cover layer.

11. The method according to claim 9, wherein said coefficient of friction is between approximately 0.02 and 0.1.

12. The method according to claim 11, wherein said coefficient of friction is between approximately 0.03 and 0.09.

13. The method according to claim 9, wherein a temperature in said vaporizer is between approximately 100°

C. and 400°

C.

14. The method according to claim 13, wherein said substrate exhibits a temperature of between approximately 300 K and 370 K.

15. The method according to claim 1, wherein said cover layer has a thickness <

approximately 20 nanometers (nm).

16. The method according to claim 15, wherein said thickness of said cover layer is <

approximately 10 nm.

17. The method according to claim 16, wherein said thickness of said cover layer is in a range between approximately 0.1 nm to 10 nm.