US 12,064,942 B2
Method for busbar hiding of a laminated glazing
Quentin Gillard, Huy (BE); Descamps Fabien, Gosselies (BE); Charley Razzini, Gosselies (BE); Pierre Defoy, Gosselies (BE); and Arthur Martinasso, Gosselies (BE)
Assigned to AGC GLASS EUROPE, Louvain-la-Neuve (BE)
Appl. No. 17/904,430
Filed by AGC GLASS EUROPE, Louvain-la-Neuve (BE)
PCT Filed Feb. 17, 2021, PCT No. PCT/EP2021/053922
§ 371(c)(1), (2) Date Aug. 17, 2022,
PCT Pub. No. WO2021/165342, PCT Pub. Date Aug. 26, 2021.
Claims priority of application No. 20158295 (EP), filed on Feb. 19, 2020.
Prior Publication US 2023/0065516 A1, Mar. 2, 2023
Int. Cl. B32B 7/12 (2006.01); B32B 17/10 (2006.01); B32B 37/06 (2006.01); B32B 27/30 (2006.01); B32B 27/40 (2006.01)
CPC B32B 17/10935 (2013.01) [B32B 17/10036 (2013.01); B32B 17/10981 (2013.01); B32B 37/06 (2013.01); B32B 7/12 (2013.01); B32B 27/306 (2013.01); B32B 27/40 (2013.01); B32B 2250/40 (2013.01); B32B 2255/20 (2013.01); B32B 2255/205 (2013.01); B32B 2255/28 (2013.01); B32B 2264/1051 (2020.08); B32B 2270/00 (2013.01); B32B 2307/202 (2013.01); B32B 2307/412 (2013.01); B32B 2315/08 (2013.01); B32B 2329/06 (2013.01); B32B 2331/04 (2013.01); B32B 2375/00 (2013.01); B32B 2605/00 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for busbar hiding of a heated coating laminated glazing formed by a first glass sheet and a second glass sheet, each having an outer and an inner face, the method comprising:
performing enamel printing on an inner face of at least one of the first glass sheet and the second glass sheet, whereby an enamel forms a pattern;
firing the enamel;
covering at least a part of the enamel pattern with a coating, the coating extending to at least an area of the enamel pattern for applying busbars;
applying in the area at least two silver paste busbars on top of the coating, whereby at least one of the at least two silver paste busbars has a first and a second part, the first part arranged to apply a voltage and an electrical current through at least a part of the coating provided under the first part of at least one of the at least two silver paste busbars, thereby obtaining a stack comprising the at least two silver paste busbars, the coating and the enamel, and the second part configured to not generate the electrical current through a part of the coating, the coating acting as a barrier between a migration of silver of the silver paste busbar toward the enamel pattern;
firing the stack;
applying a thermal treatment on the first glass sheet and the second glass sheet; and
laminating the first glass sheet and the second glass sheet with an interlayer sheet in contact with the inner faces of the first and the second glass sheets, whereby the coating is provided between the first glass sheet and the second glass sheet.