US 11,851,366 B2
Site-specific connecting of glass substrates
Robin Krüger, Hannover (DE); Roman Ostholt, Langenhagen (DE); Norbert Ambrosius, Garbsen (DE); Oktavia Ostermann, Hannover (DE); Bernd Rösener, Porta Westfalica (DE); Daniel Dunker, Hannover (DE); Arne Schnoor, Hannover (DE); and Malte Schulz-Ruhtenberg, Wunstorf (DE)
Assigned to LPKF LASER & ELECTRONICS AG, Garbsen (DE)
Appl. No. 17/420,879
Filed by LPKF LASER & ELECTRONICS AG, Garbsen (DE)
PCT Filed Jan. 29, 2020, PCT No. PCT/EP2020/052199
§ 371(c)(1), (2) Date Jul. 6, 2021,
PCT Pub. No. WO2020/157156, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 102019201351 (DE), filed on Feb. 1, 2019.
Prior Publication US 2022/0089482 A1, Mar. 24, 2022
Int. Cl. B32B 3/24 (2006.01); C03C 27/08 (2006.01); B32B 3/26 (2006.01); B32B 17/06 (2006.01); C03C 23/00 (2006.01)
CPC C03C 27/08 (2013.01) [B32B 3/266 (2013.01); B32B 17/06 (2013.01); C03C 23/0025 (2013.01); Y10T 428/24339 (2015.01); Y10T 428/24347 (2015.01)] 14 Claims
OG exemplary drawing
 
1. A process comprising steps of:
providing at least one glass substrate having spaced traversing and V-shaped tapered recesses each having a larger cross-section at a surface of the glass substrate and a smallest cross section opposite the larger cross-section,
applying glass solder onto the surface of the glass substrate in which the recesses have their larger cross-section,
heating the glass substrate with the glass solder applied thereto,
and subsequently cooling the glass substrate with the glass solder applied thereto, wherein the cooling creates solidified glass solder that protrudes beyond the surface of the glass substrate adjacent to an area of smallest cross-section of the recess, the method comprising arranging another glass substrate with recesses matching over the solidified glass solder, subsequently heating to the melting temperature of the glass solder and subsequent cooling whereby the glass solder extends with form-fit through at least the areas of smallest cross-section of the matchingly arranged recesses of the glass substrates.