초록 ▼

An article having a sealed layered edge, e.g. an automotive laminate and a multiple glazed unit includes a pair of glass sheet in a fixed relationship with one another. A sputtered coating is deposited on a major surface of one of the sheets and includes at least one combination of a metal film, e.g

An article having a sealed layered edge, e.g. an automotive laminate and a multiple glazed unit includes a pair of glass sheet in a fixed relationship with one another. A sputtered coating is deposited on a major surface of one of the sheets and includes at least one combination of a metal film, e.g. a silver film and a dielectric film. Discontinuities in the metal film at the marginal edges of the coated sheet provide voids in the metal film to impede or stop corrosion of the metal film. The discontinuities include (1) break lines or segments in the coating, (2) coating thickness variations provided by abrading the coating and (3) spaced discrete coating areas on the marginal edges of the coated sheet. The discontinuities may be made in the metal film using a laser, an abrasive surface, a coating mask and/or coating deletion techniques.

대표청구항 ▼

What is claimed is: 1. An article having a sealed edge comprising: a first substrate having a major surface; a second substrate having a major surface wherein at least one of the first and second substrates is a transparent substrate; a transparent coating sputter deposited on center portion of the

What is claimed is: 1. An article having a sealed edge comprising: a first substrate having a major surface; a second substrate having a major surface wherein at least one of the first and second substrates is a transparent substrate; a transparent coating sputter deposited on center portion of the maior surface of the first substrate with the coating extending to at least marginal edges of the major surface of the first substrate, the coating including at least one metal film between a pair of dielectric films wherein the metal film at the marginal edges of the maior surface of the first substrate has at least one area of discontinuity and a portion of at least one of the dielectric films has continuity from the marginal edges to the center portion of the first substrate, and an edge assembly securing the first substrate in a fixed relationship to the second substrate with the major surfaces of the substrates facing one another to provide an article having a sealed edge. 2. The article according to claim 1, wherein the first and second substrates are glass sheets. 3. The article according to claim 2, wherein the at least one area of discontinuity comprises a plurality of spaced discrete coating areas on the marginal edges of the first sheet. 4. The article according to claim 3, wherein the article is a laminated transparency and the edge assembly comprises a plastic interlayer sheet between and securing the sheets in a fixed relationship to one another. 5. The article according to claim 3, wherein the article is a multiple glazed unit and the edge assembly is a spacer frame having a desiccant and a moisture impervious layer on opposed surfaces of the spacer frame, the spacer frame between and the moisture impervious layers adhered to adjacent ones of the glass sheets. 6. The article according to claim 5, wherein area of the discrete coating areas increases as the distance from a peripheral edge of the first sheet increases. 7. The article according to claim 6, wherein at least a portion of the at least one area of discontinuity is within 8 mm from the peripheral edge of the first sheet. 8. The article according to claim 7, wherein the at least one area of discontinuity comprises the coating at the marginal edges of the first sheet having peaks and valleys, with an outermost film of the coating removed and portions of the metal film of the coating removed. 9. The article according to claim 2, wherein the article has at least one outer surface having a hydrophobic film. 10. The article according to claim 3, wherein the discrete coating areas have an area that increases as the distance from a peripheral edge of the first sheet increases. 11. The article according to claim 10, wherein at least a portion of the at least one area of discontinuity is within a distance of 8 mm spaced from the peripheral edge of the first sheet. 12. The article according to claim 11, wherein at least a portion of the at least one area of discontinuity is within a distance of 3 mm spaced from the peripheral edge of the first sheet. 13. The article according to claim 12, wherein the at least one area of discontinuity comprises the coating at the marginal edges of the first sheet having peaks and valleys, with an outermost film of the coating removed and portions of an innermost film of the coating removed. 14. The article according to claim 13 wherein at least one outer surface of the article has a photocatalytic coating. 15. An article having a sealed edge comprising: a first glass sheet having a major surface; a second glass sheet having a major surface; a sputtered coating deposited over the major surface of the first glass sheet, the coating including at least one metal film and a dielectric film, the at least one metal film having at least one area of discontinuity, wherein the at least one area of discontinuity includes at least one groove in at least the metal film of the coating, the groove extending along a path spaced from the edge of the first sheet with portions of the at least one groove extending through at least portions of the at least one metal film, and an edge assembly securing the first glass sheet in a fixed relationship to the second glass sheet with the major surfaces of the sheets facing one another to provide an article having a sealed edge. 16. The article according to claim 15, wherein the at least one groove has endless length. 17. The article according to claim 16, wherein the at least one groove is a first groove, the coating includes two combinations of a metal film and a dielectric film and the metal films are silver films, and further including second and third grooves each of endless length defined as a second endless groove and third endless groove, respectively, wherein the second endless groove is within the first endless groove and the third endless groove is within the second endless groove and each of the endless grooves have portions that extend through both the silver films. 18. The article according to claim 17, wherein the first, second, and third endless grooves are in the coating at the marginal edge portion of the first sheet and within 8 mm of a peripheral edge of the first sheet. 19. The article according to claim 16, wherein the article is a laminated transparency and the edge assembly comprises a plastic interlayer sheet between and securing the sheets in a fixed relationship to one another. 20. The article according to claim 16, wherein the article is a multiple glazed unit and the edge assembly is a spacer frame having a desiccant and a moisture impervious layer on opposed surfaces of the spacer frame, the spacer frame between and the moisture impervious layers adhered to adjacent ones of the glass sheets. 21. The article according to claim 15, wherein the at least one groove is a plurality of spaced grooves have a starting point adjacent a peripheral edge of the first sheet and extending inward from the peripheral edge. 22. The article according to claim 21, wherein the plurality of spaced grooves end within a distance of 8 mm spaced from the peripheral edge of the first sheet. 23. The article according to claim 15, wherein the at least one groove is a continuous groove having a starting point in the coating at the marginal edge of the first sheet and extending away from the starting point along a path spaced from and generally following a peripheral edge of the first sheet and ending a cycle defined as the first cycle at an end point aligned with the starting point of the first cycle and spaced a greater distance from the peripheral edge of the first sheet than the distance of the starting point of the first cycle from the peripheral edge of the first sheet, wherein portions of the continuous groove along path of the first cycle extend through at least a portion of the at least one metal film. 24. The article according to claim 23, wherein the continuous groove further comprises at least one additional cycle starting at the end point of the first cycle and extending continuously from the end point of the first cycle along a path away from the end point of the first cycle, spaced from the continuous groove of the first cycle and generally following the peripheral edge of the first sheet and ending at an end point aligned with the starting point of the at least one additional cycle and spaced a greater distance from the peripheral edge of the first sheet than the distance of the starting point of the at least one additional cycle from the peripheral edge of the first sheet, wherein portions of the at least one groove along path of the first cycle and at least one additional cycle extend through at least a portion of the at least one metal film. 25. The article according to claim 24, wherein the coating has two combinations of a metal film and a dielectric film and each metal film is a silver film, and the continuous groove is within 8 mm of the peripheral edge of the first sheet and portions of the continuous groove extend through the first and second silver films. 26. The article according to claim 25, wherein the article is a laminated transparency and the edge assembly comprises a plastic interlayer sheet between and securing the sheets in a fixed relationship to one another. 27. The article according to claim 25, wherein the article is a multiple glazed unit and the edge assembly is a spacer frame having a desiccant and a moisture impervious layer on opposed surfaces of the spacer frame, the spacer frame between and the moisture impervious layers adhered to adjacent ones of the glass sheets. 28. The article according to claim 15, wherein the at least one groove comprises a first plurality of discrete groove segments in the at least one metal film along a path spaced from a peripheral edge of the first sheet defined as a first path with a space between ends of adjacent first groove segments, and a second plurality of discrete groove segments in the at least one metal film along a second path, the second path spaced from the first path a greater distance from the peripheral edge of the first sheet than the first path with a space between ends of adjacent second groove segments, and wherein the first groove segments are generally aligned with the space between the ends of the adjacent second groove segments and selected portions of the first and second groove segments along the first and second paths, respectively, extend through the metal film. 29. The article according to claim 28, wherein the article is a laminated transparency and the edge assembly comprises a plastic interlayer sheet between and securing the sheets in a fixed relationship to one another. 30. The article according to claim 28, wherein the article is a multiple glazed unit and the edge assembly is a spacer frame having a desiccant and a moisture impervious layer on opposed surfaces of the spacer frame, the spacer frame between and the moisture impervious layers adhered to adjacent ones of the glass sheets. 31. An article having a sealed edge comprising: a first substrate having a major surface; a second substrate having a major surface wherein at least one of the substrates is a transparent substrate; and a transparent coating deposited on and covering center portions and marginal edge portions of the major surface of the first substrate, the coating including at least one metal film between a pair of dielectric films, the metal film having discontinuities at the marginal edge portions and a portion of at least one of the dielectric films has continuity from the marginal edges to the center portion of the first substrate, wherein at least the coating is secured to marginal edge portions of the second substrate to provide an article having a sealed layered edge. 32. The article according to claim 31 wherein the coating is a sputtered coating.