Patent ID: 9328010
Filing Date: 2016-05-03
CPC Classification: C03B,G02B

Claim Text:
1. A method for structuring a flat substrate comprising a glass material during a viscous flow process in which a glass flat substrate is joined to a surface of another flat substrate which has at least one depression bounded by a circumferential edge located in the surface and during a subsequent tempering process in which the glass material is changed to a viscous free-flowing state in which at least proportions of the free-flowing glass material of the glass flat substrate flows over the circumferential edge into the depression in the other flat substrate, comprising: providing the other flat substrate so that in at least one depression at least one wetting surface is present that is countersunk with respect to the surface of the other flat substrate and is at least partly bounded by another edge which, at the same time, is an edge of a trench provided within the depression and countersunk with respect to the wetting surface; carrying out the tempering process so that the free-flowing glass material of the glass flat substrate is brought into contact with the wetting surface so that a wetting front forms along the another edge; and ending the tempering process after the formation of a surface of the glass material, which extends between the wetting front and the circumferential edge without contact with the other flat substrate and that encloses a cavity within a sub-region of the depression.