The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 19, 2020
Filed:
Aug. 30, 2018
Schott Ag, Mainz, DE;
Ina Mitra, Stadecken-Elsheim, DE;
Miriam Kunze, Neustadt am Rübenberg, DE;
Linda Johanna Bartelt, Landshut, DE;
Sabrina Wimmer, Altdorf, DE;
Frank Kroll, Landshut, DE;
Hauke Esemann, Wörrstadt, DE;
Bernd Hoppe, Ingelheim, DE;
Jörg Witte, Pfungstadt, DE;
Schott AG, Mainz, DE;
Abstract
The present disclosure relates to a bonding glass which has improved water resistance and has a coefficient of thermal expansion α(25-300) of from 14·10Kto 17·10K, comprising, in mol % on an oxide basis, 5-7 of BO, 10-14 of AlO, 36-43 of PO, 15-22 of NaO, 12.5-20 of KO, 2-6 of BiOand >0-6 of R oxide, where R oxide is an oxide selected from the group consisting of MnOand SiOand SnOand TaOand NbOand FeOand GeOand CaO. The bonding glass is free of PbO except for, at most, impurities. The bonding glass may have a glass transition temperature Tg of from 390° C. to 430° C. The present disclosure also relates to uses of this bonding glass.