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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0271794 (2011-10-12) |
등록번호 | US-RE43817 (2012-11-20) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 1 인용 특허 : 435 |
The invention provides a substrate bearing a low-maintenance coating. The coating includes two films: a first film comprising silica (e.g., silicon dioxide) and a second film comprising titania (e.g., titanium dioxide). Preferably, both films are provided within particular thickness ranges. The inve
The invention provides a substrate bearing a low-maintenance coating. The coating includes two films: a first film comprising silica (e.g., silicon dioxide) and a second film comprising titania (e.g., titanium dioxide). Preferably, both films are provided within particular thickness ranges. The invention also provides methods of depositing such coatings.
1. A low-maintenance coating on a glass sheet, the coating comprising a firstbase film positioned directly over a first major surface of the glass sheet and a secondphotocatalytic film positioned directly over the firstbase film, wherein the firstbase film includes a base film and has a thickness of
1. A low-maintenance coating on a glass sheet, the coating comprising a firstbase film positioned directly over a first major surface of the glass sheet and a secondphotocatalytic film positioned directly over the firstbase film, wherein the firstbase film includes a base film and has a thickness of less than about 100 angstroms, and wherein the second film includes a photocatalytic film and has a thickness of less than about 100 angstroms. 2. The low-maintenance coating of claim 1 wherein the base film is silica. 3. The low-maintenance coating of claim 2 wherein the coated first major surface is in periodic contact with rain. 4. The low-maintenance coating of claim 1 wherein the photocatalytic film is titania. 5. The low-maintenance coating of claim 1 wherein the thickness of the firstbase film is between about 70 angstroms and about 100 angstroms. 6. The low-maintenance coating of claim 1 wherein the thickness of the secondphotocatalytic film is between about 30 angstroms and about 120100 angstroms. 7. The low-maintenance coating of claim 1 wherein the glass sheet is a window pane mounted in a window frame, and wherein the coated first major surface is exposed to an outdoor environment. 8. The low-maintenance coating of claim 1 wherein the firstbase film consists essentially of silica and the secondphotocatalytic film consists essentially of titania. 9. The low-maintenance coating of claim 8 wherein the silica is silicon dioxide, and the titania is titanium dioxide or substoichiometric titanium oxide. 10. The low-maintenance coating of claim 1 wherein the firstbase and secondphotocatalytic films are both sputtered films. 11. A low-maintenance coating on a glass sheet, the coating comprising a first film positioned directly over a first major surface of the glass sheet and a second film positioned directly over the first film, wherein the first film consists essentially of silica and has a thickness of between about 30 angstroms and about 100 angstroms, and wherein the second film consists essentially of titania and has a thickness of less than 100 angstroms but greater than about 30 angstroms. 12. The low-maintenance coating of claim 11 wherein the second film has a thickness of less than about 80 angstroms. 13. The low-maintenance coating of claim 11 wherein the silica of the first film contains aluminum oxide. 14. The low-maintenance coating of claim 11 wherein the silica of the first film includes an electrically conductive material present in oxidized form. 15. The low-maintenance coating of claim 14 wherein the second film is an outermost film of the coating. 16. The low-maintenance coating of claim 2 wherein the base film further comprises an oxidized electrically conductive material. 17. The low-maintenance coating of claim 16 wherein the electrically conductive material is aluminum. 18. The low-maintenance coating of claim 8 wherein the base film has a thickness of between about 70 angstroms and about 100 angstroms, and the photocatalytic film has a thickness of between about 30 angstroms and about 100 angstroms. 19. A low-maintenance coating on a substrate, the coating comprising a base film extending directly from a first major surface of the substrate to a thickness of less than about 100 angstroms, and a photocatalytic film extending directly from a surface of the base film to a thickness of less than about 100 angstroms. 20. The low-maintenance coating of claim 19 wherein the base film consists essentially of silica and the photocatalytic film consists essentially of titania. 21. The low-maintenance coating of claim 19 wherein the base and photocatalytic films are both sputtered films. 22. The low-maintenance coating of claim 19 wherein the base film extends directly from the first major surface of the substrate to a thickness of between about 70 angstroms and about 100 angstroms, and the photocatalytic film extends directly from the surface of the base film to a thickness of between about 30 angstroms and about 100 angstroms.
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