US 11,728,156 B2
Glass-metal feedthrough
Robert Hettler, Kumhausen (DE)
Assigned to Schott AG, Mainz (DE)
Filed by Schott AG, Mainz (DE)
Filed on Nov. 3, 2021, as Appl. No. 17/518,054.
Application 17/518,054 is a continuation of application No. 16/516,507, filed on Jul. 19, 2019, granted, now 11,217,440.
Prior Publication US 2022/0059337 A1, Feb. 24, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01J 61/36 (2006.01); H01B 17/30 (2006.01); H01M 50/186 (2021.01); H01M 50/191 (2021.01); B60R 21/26 (2011.01); B60R 22/34 (2006.01); C03C 27/02 (2006.01); F42B 3/107 (2006.01); F42B 3/198 (2006.01)
CPC H01J 61/366 (2013.01) [B60R 21/26 (2013.01); B60R 22/34 (2013.01); C03C 27/02 (2013.01); F42B 3/107 (2013.01); H01B 17/305 (2013.01); H01M 50/186 (2021.01); H01M 50/191 (2021.01); B60R 2021/26029 (2013.01); F42B 3/198 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A glass-metal feedthrough, comprising:
an external conductor having a coefficient of expansion αexternal, and having an opening formed therein;
an internal conductor disposed in the opening, the internal conductor comprising iron and having a coefficient of expansion αexternal, the external conductor and the internal conductor being configured to not release nickel when in contact with a human or animal body or biological cells of a cell culture; and
a glass material surrounding the internal conductor within the opening and having a coefficient of expansion αglass, the coefficient of expansion of the internal conductor αinternal and the coefficient of expansion of the external conductor αexternal are such that a joint pressure on the internal conductor of at least 30 MPa is generated in a temperature range of 20° C. to a glass transformation temperature of the glass material.