Structured plate-like glass element and process for the production thereof

Patent metadata

Field	Value
Publication number	US-12017943-B2
Application number	US-202117375364-A
Country	US
Kind code	B2
Filing date	Jul 14, 2021
Priority date	Jan 27, 2017
Publication date	Jun 25, 2024
Grant date	Jun 25, 2024

Abstract

A plate-like glass element includes a pair of opposite side faces and an opening having a transverse dimension of at least 200 μm. The opening is delimited by an edge. The edge has a plurality of rounded, substantially hemispherical depressions that adjoin one another. The plurality of rounded, substantially hemispherical depressions having abutting concave roundings which form ridges.

First claim

What is claimed is:

1. A plate-like glass element, comprising:
a pair of opposite side faces; and
an opening having a transverse dimension of at least 200 μm, wherein the opening is delimited by an edge, the edge having a plurality of rounded, substantially hemispherical depressions that adjoin one another, said plurality of rounded, substantially hemispherical depressions having abutting concave roundings which form ridges, wherein said ridges form polygonal delimiting lines as viewed in a plan-view of said plurality of rounded, substantially hemispherical depressions.

2. The plate-like glass element according to claim 1 , wherein an average number of corners of the delimiting lines of the depressions is less than eight.

3. The plate-like glass element according to claim 1 , wherein said glass element has a thickness in a range from 30 microns to 3 millimetres.

4. The plate-like glass element according to claim 1 , wherein said edge of said opening includes a plurality of channels which run parallel to one another.

5. The plate-like glass element according to claim 4 , wherein said plurality of channels adjoin one another so that a plurality of ridges, which run parallel to a longitudinal direction of said plurality of channels, are formed between said plurality of channels.

6. The plate-like glass element according to claim 5 , wherein a surface of said edge runs at right angles to said side faces with a deviation of not more than 5° from a right angle.

7. The plate-like glass element according to claim 1 , wherein said glass element has a thickness in a range from 30 microns to 3 millimetres and has said two opposite side faces such that a contour of the glass element comprises an elongated web whose length is at least five times greater than its width, with the length and width each being measured in a direction along one of said side faces and a plurality of edges running next to one another of a web each having a plurality of adjoining, rounded, substantially hemispherical depressions.

8. The plate-like glass element according to claim 7 , wherein the glass element has a frame, with the web being joined at both ends to the frame.

9. The plate-like glass element according to claim 1 , wherein the glass element has at least one edge, and said at least one edge has a plurality of substantially hemispherical depressions and has:
an average fracture strength of at least 200 MPa; or
a Weibull modulus of a Weibull distribution of tensile stress values for a fracture test for fractures extending from said at least one edge of at least 5.5.

10. The plate-like glass element according to claim 1 , wherein a glass of the glass element is a silicate glass having a content of alkali metal oxides of less than 17 percent by weight such that the silicate glass has a basicity in the range from 0.45 to 0.55.

11. The plate-like glass element according to claim 1 , wherein a depth of the substantially hemispherical depressions is less than 5 μm.

12. The plate-like glass element according to claim 1 , wherein said plate-like glass element has a thickness in a range from 30 micrometres to 3 millimetres and said two side faces facing each other, wherein at least two openings are inserted in said glass element such that a region of the glass element between the openings forms a structure with at least one web whose minimal width is less than 1 mm, wherein a parameter G is defined for the structure, and G is defined by:

G
=

l
1
2

l
2

·
b
·

h
3

·
N

wherein the parameter G has a value of at least 10 mm −1/3 and of at most 400 mm −1/3 , wherein l 1 is a longest edge length between a pair of contact regions being adjacent along an edge of one of said openings, and l 2 is a length of a shortest possible straight-line connection between said contact regions, and wherein each said contact region of a respective web is each defined as a circular region of the glass element, having a diameter of 1 mm, and said circular region is arranged at said at least one web such that each border of said circular region touches corresponding borders of both of said openings on at least one point, an intermediate range of said openings forming said at least one web, and wherein b denotes a minimal web width, h denotes a thickness of the glass element, and N is a number of said contact regions.

13. The plate-like glass element according to claim 1 , wherein said edge of said opening includes a plurality of channels which run parallel to one another and wherein an area of convex regions in the channels is less than 5%.

14. The plate-like glass element according to claim 13 , wherein the area of convex regions in the channels is less than 2%.

15. A plate-like glass element, comprising:
a pair of opposite side faces; and
an opening having a transverse dimension of at least 200 μm, wherein the opening is delimited by an edge, the edge having a plurality of rounded, substantially hemispherical depressions that adjoin one another, said plurality of rounded, substantially hemispherical depressions having abutting concave roundings which form ridges, wherein an average number of corners of polygonal delimiting lines of the depressions is less than eight.

16. The plate-like glass element of claim 15 ,
wherein a depth of the substantially hemispherical depressions is less than 5 μm.

Assignees

• Schott Ag

Inventors

• Ortner Andreas
• Roters Andreas
• Lentes Frank-Thomas
• Parthier Lutz
• Heiss-Chouquet Markus
• Peuchert Ulrich
• Wagner Fabian
• Resch Florian
• Brückbauer Laura
• Jotz Matthias
• Glässer Vanessa

Classifications

• C03C23/0025

  by a laser beam · CPC title

• C03C15/00 Primary

  Surface treatment of glass, not in the form of fibres or filaments, by etching (etching or surface-brightening compositions, in general C09K13/00) · CPC title

• C03B33/082

  using a focussed radiation beam, e.g. laser (C03B33/0855 takes precedence) · CPC title

• C03B33/074

  Glass products comprising an outer layer or surface coating of non-glass material · CPC title

• C03B33/023

  the sheet {or ribbon} being in a horizontal position · CPC title