REFLECTOR FILM AND PRODUCTION METHOD THEREOF, AND LIGHTING APPARATUS USING THE SAME

• US 20080310042A1
• Filed: 02/07/2008
• Published: 12/18/2008
• Est. Priority Date: 02/07/2007
• Status: Abandoned Application

• Current Assignee: Stanley Electric Company Limited
• Original Assignee: Stanley Electric Company Limited
• Inventors: Suzuki, Yoshio, Taya, Shuichi
• Application Number:
  US12/027,309
• Publication Number:
  US 20080310042A1
• Time in Patent Office: Days
• US Class Current: 359/883
• CPC Class Codes: C23C 28/00 Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
• CPC Class Codes: C23C 28/021 including at least one metal alloy layer
• CPC Class Codes: C23C 28/023 only coatings of metal elements only
• CPC Class Codes: C23C 28/321 with at least one metal alloy layer
• CPC Class Codes: C23C 28/322 only coatings of metal elements only
• CPC Class Codes: C23C 28/34 including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
• CPC Class Codes: C23C 28/345 with at least one oxide layer
• CPC Class Codes: F21S 41/37 characterised by their material, surface treatment or coatings
• CPC Class Codes: F21V 7/24 characterised by the material
• CPC Class Codes: F21V 7/28 characterised by coatings
• CPC Class Codes: G02B 5/085 at least one of the reflecting layers comprising metal

Abstract

A reflector film can have a high heat resistance and can maintain a high reflectance (or effectively prevent the decrease in the reflectance) when overlaid with a particular protective film. A lighting apparatus can also be configured for use with such a reflector film. The reflector film can include a silver or silver alloy film deposited on a substrate, and a titanium or titanium alloy film deposited on the silver or silver alloy film to serve as a protective film.

Claims

1. A reflector film comprising:

at least one of a silver film and a silver alloy film; and

at least one film selected from the group consisting of a titanium film, a titanium alloy film, and a SiAlON (general formula Si_(6-Z)Al_ZO_ZN_(8-Z) (0<

Z≦

4.2)) film serving as a protective film deposited on the at least one of the silver film and the silver alloy film.

2. The reflector film according to claim 1, wherein at least one of the silver film and silver alloy film has a thickness of 50 nm to 500 nm and at least one of the titanium film and titanium alloy film has a thickness of 0.1 nm to 2 nm and is deposited on the at least one of the silver film and silver alloy film.

3. The reflector film according to claim 1, wherein at least one of the silver film and silver alloy film has a thickness of 50 nm to 500 nm and the SiAlON (general formula Si_(6-Z)Al_ZO_ZN_(8-Z) (0<

Z≦

4.2)) film has a thickness of 0.5 nm to 10 nm and is deposited on the at least one of the silver film and silver alloy film.

4. A reflector comprising:

a substrate having a predetermined shape;

at least one of a silver film and a silver alloy film deposited on the substrate; and

at least one film selected from the group consisting of a titanium film, a titanium alloy film, and a SiAlON (general formula Si_(6-Z)Al_ZO_ZN_(8-Z) (0<

Z≦

4.2)) film serving as a protective film and deposited on the at least one of the silver film and silver alloy film.

5. The reflector according to claim 4, wherein the at least one of the silver film and silver alloy film has a thickness of 50 nm to 500 nm and at least one of the titanium film and titanium alloy film has a thickness of 0.1 nm to 2 nm and is deposited on the at least one of the silver film and silver alloy film.

6. The reflector according to claim 4, wherein the at least one of the silver film and silver alloy film has a thickness of 50 nm to 500 nm and the SiAlON (general formula Si_(6-Z)Al_ZO_zN_(8-Z) (0<

Z≦

4.2)) film has a thickness of 0.5 nm to 10 nm and is deposited on the at least one of the silver film and silver alloy film.

7. The reflector according to claim 4, wherein the reflector is configured for use in a vehicular lighting device.

8. The reflector according to claim 4, wherein the predetermined shape of the substrate includes at least one of a revolved paraboloid, a spheroid, and a free curved surface.

9. The reflector according to claim 7, wherein the lighting device is a projector type headlight.

10. The reflector according to claim 8, wherein the reflector is configured for use in a vehicular lighting device, and the lighting device is a projector type headlight.

12. A lighting apparatus comprising a light source and the reflector according to claim 4 located adjacent the light source.

13. The lighting apparatus according to claim 12, wherein the at least one of the silver film and silver alloy film has a thickness of 50 nm to 500 nm and at least one of the titanium film and titanium alloy film has a thickness of 0.1 nm to 2 nm and is deposited on the at least one of the silver film and silver alloy film.

14. The lighting apparatus according to claim 12, wherein the at least one of the silver film and silver alloy film has a thickness of 50 nm to 500 nm and the SiAlON (general formula Si_(6-Z)Al_ZO_ZN_(8-Z) (0<

Z≦

4.2)) film has a thickness of 0.5 nm to 10 nm and is deposited on the at least one of the silver film and silver alloy film.

15. The lighting apparatus according to claim 12, wherein the lighting apparatus is configured for use in a vehicular lighting device.

16. The lighting apparatus according to claim 13, wherein the lighting apparatus is configured for use in a vehicular lighting device.

17. The lighting apparatus according to claim 14, wherein the lighting apparatus is configured for use in a vehicular lighting device.

18. The lighting apparatus according to claim 15, wherein the reflector has a surface shape selected from at least one of a revolved paraboloid, a spheroid, and a free curved surface.

19. The lighting apparatus according to claim 16, wherein the reflector has a surface shape selected from at least one of a revolved paraboloid, a spheroid, and a free curved surface.

20. The lighting apparatus according to claim 17, wherein the reflector has a surface shape selected from at least one of a revolved paraboloid, a spheroid, and a free curved surface.

21. The lighting apparatus according to claim 15, wherein the lighting apparatus is configured for use in a projector type headlight.

22. The lighting apparatus according to claim 16, wherein the lighting apparatus is configured for use in a projector type headlight.

23. The lighting apparatus according to claim 17, wherein the lighting apparatus is configured for use in a projector type headlight.

11. A method for producing a reflector film, comprising:

providing a substrate;

depositing at least one of a silver and a silver alloy film on the substrate by sputtering; and

subsequently depositing at least one film selected from the group consisting of a titanium film, a titanium alloy film, and a SiAlON (general formula Si_(6-z)Al_ZO_ZN_(8-z) (0<

Z≦

4.2)) film by sputtering.