Pressure sensor having a joint of active braze

US10908044B2 · kind B2 · utility

Assignee

• Endress+Hauser SE+Co. KG · DE

Inventors

• Andreas Rossberg · Bad Säckingen, DE
• Elke Schmidt · Bad Säckingen, DE
• Markus Rettenmayr · Jena, DE
• Peter Siegmund · Jena, DE
• Uta Kuhn · Rabenau, DE
• Simon Pauly · Dresden, DE
• Nils Ponath · Lörrach, DE

Key dates

• Filing date: May 10, 2016
• Grant date: Feb 2, 2021
• Expiry date: Jul 30, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L19/143
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A pressure sensor comprising two parts connected with one another via an active braze joint manufactured by active hard soldering, or brazing, with an active hard solder, or braze, especially a pressure contactable, pressure-dependently elastically deformable, measuring membrane, especially a ceramic measuring membrane, and a platform, especially a ceramic platform, which are connected by an active braze joint connecting an outer edge of the measuring membrane (which covers a pressure chamber with an outer edge of an end of the platform facing the measuring membrane, whose measuring characteristics are improved in that the active braze joint has a coefficient of thermal expansion dependent on the dimensions of the active braze joint and on the materials of the parts and matched to a coefficient of thermal expansion of at least one of the parts, especially the measuring membrane.