Method for producing a glass ceramic element with patterned coating

A glass-ceramic, structured technology applied in the direction of manufacturing tools, reproduction/marking methods, chemical instruments and methods, etc., to achieve the effect of solving visibility

CN105693109AInactive Publication Date: 2016-06-22SCHOTT AG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-06-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention is based on the object to improve the creation of patterned coatings on glass ceramic substrates so as to provide for more flexibility in patterning. A method is provided for producing a glass ceramic element (1) with a patterned coating is provided. The method includes: providing a glass ceramic element (1) with a coating which is at least partially light-blocking and preferably opaque in the visible spectral range; irradiating the glass ceramic element (1) with a pulsed laser beam (71) on the face provided with the coating (5) so that the coating (5) is removed by ablation; during irradiating the laser beam is directed over the surface of the glass ceramic element (1) so that a portion of the coating (5) is removed which has a greater lateral extent than the diameter of the laser beam; and once the coating (5) has been removed, irradiating the glass ceramic with the laser (7) in the region where the coating (5) has been removed, thereby optically modifying the glass ceramic in the irradiated region.
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Description

technical field

[0001] The present invention generally relates to a glass ceramic part provided with a structured coating. The invention relates in particular to glass-ceramic parts having a translucent structure in the coating. Background technique

[0002] Glass-ceramic cooktops are already known from the prior art, the underside of which is coated in order to change the appearance and also to conceal glass-ceramic components formed underneath the cooktop.

[0003] One possibility for this is sol-gel coating. The coating is quite heat resistant and is also characterized by good adhesion to glass ceramic plates. To cover the internal components of the cooktop, opaque coatings are often used.

[0004] For some applications it is desirable that the coating is not over the entire surface, but has windows. These windows are arranged in particular in front of the illuminated display element, so that the display element shines through the glass ceramic plate and can be seen b...

Examples

Embodiment Construction

[0024] For a detailed description of the glass-ceramic part 1 provided with a structured coating, see first figure 1 , which includes a coating 5 fabricated in conventional screen printing. The plate-shaped glass ceramic part 1 has two opposite sides 10 , 11 . In the case of a glass-ceramic part in the form of a glass-ceramic cooking plate, one of the sides 10 , 11 forms the use surface.

[0025] The coating 5 on at least one side 10 , 11 is multilayered and consists of a first colored layer 51 on the glass ceramic 2 and a second colored layer 52 applied on the first colored layer 51 . Structural components 53 are present in the first color layer 51 . The structural component is formed by a region in which the glass ceramic 2 is exposed and in which there is also no coating. The outline of the structural component can have the shape of a logo, a character or a logo, for example. This structured interruption by the color layer enables light to pass through the glass-ceramic...