Patent ID: 11945392
Assignee: SCHOTT AG
Field: Transport (Mechanical engineering)
Classification: CPC B  F  C  H | IPC B  C  F  H

Claim 12:
13. An ignition device, comprising:
a metal-fixing material feedthrough comprising:
a main body having a through opening formed therein; and
at least one metal pin fused into the through opening in a vitreous or glass ceramic fixing material, a surface of the vitreous or glass ceramic fixing material being a freely fused surface and lying in a same plane as an end face of the at least one metal pin, a mean roughness Ra of the surface of the vitreous or glass ceramic fixing material according to DIN EN ISO 4287 being less than 0.1 μm or being in a range of from 0.015 μm to 0.05 μm.