Carbon film coated glass

• US 5,378,527 A
• Filed: 02/14/1992
• Issued: 01/03/1995
• Est. Priority Date: 02/15/1991
• Status: Expired due to Fees

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Nakanishi, Masatsugu, Tsutsuki, Misao, Yokoishi, Shouji
• Primary Examiner(s): TURNER, ARCHENE A
• Application Number:
  US07/836,022
• Time in Patent Office: 1,054 Days
• Field of Search: 428/408, 428/426, 428/428, 428/697, 428/216, 428/701, 428/702, 428/432
• US Class Current: 428/216
• CPC Class Codes: C03C 17/3441 comprising carbon, a carbide or oxycarbide
• CPC Class Codes: C03C 17/3452 comprising a fluoride
• CPC Class Codes: Y10T 428/24975 No layer or component greater than 5 mils thick
• CPC Class Codes: Y10T 428/30 Self-sustaining carbon mass or layer with impregnant or other layer

Abstract

Carbon film coated glass is disclosed which includes a glass substrate, an intermediate layer formed on a surface of the glass substrate in a thickness of 50 angstroms or more and including metallic oxide in an amount of 5% or more by mole and balance of carbon at least, and a carbon film formed on a surface of the intermediate layer in a thickness of 10 angstroms or more. The intermediate layer closely binds the glass substrate and the carbon film together, and thereby it inhibits the carbon film from coming off. The carbon film coated glass is thus improved in the durability. Additionally, the carbon film can include fluorine which is combined with its surface at least, and thereby it improves the repellency of the carbon film coated glass as well as the transparency thereof.

Claims

1. Carbon film coated glass, comprising:

a glass substrate;

an intermediate layer formed on a surface of said glass substrate by physical vacuum deposition, said intermediate layer having a thickness of 50 angstroms or more and comprising carbon and 5 mole % or more of one or more metallic oxides, wherein said deposition is carried out by a process comprising applying to a carbon target a first electric power input which increases to a predetermined value over a period of time and applying to a metallic oxide target a second electric power input which decreases to a predetermined value over a period of time, the intermediate layer being formed predominantly of said one or more metallic oxides adjacent said glass substrate and having a metallic oxides content which decreases as the distance away from said glass substrate increases; and

a carbon film formed by physical vacuum deposition on said intermediate layer and having a thickness of 10 angstroms or more.

2. The carbon film coated glass according to claim 1, wherein said intermediate layer has an innermost surface and an outermost surface and the mole percentage of said carbon in said intermediate layer increases from said innermost surface thereof toward said outermost surface thereof.

3. The carbon film coated glass according to claim 1, wherein said intermediate layer includes a metallic oxide layer comprised of one or more metallic oxides formed on the substrate and a mixture layer formed on the metallic oxide layer and comprised of carbon and one or more metallic oxides.

4. The carbon film coated glass according to claim 3, wherein said mixture layer has an innermost surface and an outermost surface and the mole percentage of said carbon in said mixture layer increases from said innermost surface thereof toward said outermost surface thereof.

5. The carbon film coated glass according to claim 1, wherein said intermediate layer includes a first mixture layer comprised of a plurality of metallic oxides and carbon, and a second mixture layer formed on the first mixture layer and comprised of one of said metallic oxides and carbon.

6. The carbon film coated glass according to claim 5, wherein each of said mixture layers has an innermost surface and an outermost surface and the mole percentages of said carbon in said first and second mixture layers both increase from said innermost surfaces thereof toward said outermost surfaces thereof.

7. The carbon film coated glass according to claim 1, wherein said carbon film further includes fluorine which is combined therewith at least at a surface thereof.

8. The carbon film coated glass according to claim 7, wherein said carbon film has an innermost surface and an outermost surface and the mole percentage of said fluorine increases in said carbon film from said innermost surface thereof toward said outermost surface thereof.

9. The carbon film coated glass according to claim 1, wherein said carbon film further includes fluorine which is combined therewith across its thickness.

10. The carbon film coated glass according to claim 9, wherein said carbon film has an innermost surface and an outermost surface and the mole percentage of said fluorine increases in said carbon film from said innermost surface thereof toward said outermost surface thereof.

11. The carbon film coated glass according to claim 1, wherein said intermediate layer further includes fluorine.

12. The carbon film coated glass according to claim 1, wherein said glass substrate includes at least one oxide glass selected from the group consisting of silicate glass, borosilicate glass, soda-lime glass and flint glass.

13. The carbon film coated glass according to claim 1, wherein said metallic oxide includes at least one member selected from the group consisting of SiO₂, TiO₂, ZrO₂, Y₂ O₃ Al₂ O₃ PbO, CaO, MgO, B₂ O₃, Fe₂ O₃, Na₂ O, K₂ O and Li₂ O.

14. Carbon film coated glass, comprising:

a glass substrate;

an intermediate layer formed on a surface of said glass substrate by physical vacuum deposition, said intermediate layer having a thickness of 50 angstroms or more and comprising carbon and 5 mole % of one or more metallic oxides, wherein said deposition is carried out by a process comprising applying to a carbon target a first electric power input which increases to a predetermined value over a period of time and applying to a metallic oxide target a second electric power input which decreases to a predetermined value over a period of time, the intermediate layer being formed predominantly of said one or more metallic oxides adjacent said glass substrate and having a metallic oxides content which decreases as the distance away from said glass substrate increases; and

a fluorine-containing carbon film formed by physical vacuum deposition on said intermediate layer and having a thickness of 10 angstroms or more and combined with fluorine at least at a surface thereof.

15. The carbon film coated glass according to claim 14, wherein said intermediate layer has an innermost surface and an outermost surface and the mole percentage of carbon in said intermediate layer increases from said innermost surface thereof toward said outermost surface thereof.

16. The carbon film coated glass according to claim 14, wherein said intermediate layer further includes fluorine.

17. The carbon film glass according to claim 14, wherein said intermediate layer includes a metallic oxide layer comprised of one or more of metallic oxides formed on the substrate, and a mixture layer formed on the metallic oxide layer and comprised of one or more metallic oxides and carbon.

18. The carbon film coated glass according to claim 17, wherein said mixture layer has an innermost surface and an outermost surface and the mole percentage of said carbon in said mixture layer increases from said innermost surface thereof toward said outermost surface thereof.

19. The carbon film coated glass according to claim 17, wherein each of said metallic oxide layer and said mixture layer further includes fluorine.

20. The carbon film coated glass according to claim 14, wherein said intermediate layer includes a first mixture layer including a plurality of metallic oxides and carbon formed on the substrate and a second mixture layer formed on the first mixture layer and including one metallic oxide and carbon.

21. The carbon film coated glass according to claim 20, wherein each of said mixture layers has an innermost surface and an outermost surface and the mole percentages of said carbon in said first and second mixture layers both increase from the innermost surfaces thereof toward the outermost surfaces thereof.

22. The carbon film coated glass according to claim 20, wherein each of said first mixture layer and said second mixture layer further includes flourine.

23. The carbon film coated glass according to claim 14, wherein said fluorine-containing carbon film has an innermost surface and an outermost surface and the mole percentage of fluorine in said fluorine-containing carbon film increases from said innermost surface thereof toward said outermost surface thereof.

24. The carbon film coated glass according to claim 14, wherein said fluorine-containing carbon film is combined with fluorine, across its thickness.

25. The carbon film coated glass according to claim 24, wherein said flourine-containing carbon film has an innermost surface and an outermost surface and the mole percentage of fluorine in said fluorine-containing carbon film increases from said innermost surface thereof toward said outermost surface thereof.

26. The carbon film coated glass according to claim 14, wherein said glass substrate includes at least one oxide glass selected from the group consisting of silicate glass, borosilicate glass, soda-lime glass and flint glass.

27. The carbon film coated glass according to claim 14, wherein said metallic oxide includes at least one member selected from the group consisting of SiO₂, TiO₂, ZrO₂, Y₂ O₃, Al₂ O₃, PbO, CaO, MgO, B₂ O₃, Fe₂ O₃, Na₂ O, K₂ O and Li₂ O.