Sensors for selectively determining liquid-phase or gas-phase components using a heteropolysiloxane sensitive layer

US4878015A · kind A · utility

Assignee

• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US

Inventors

• Helmut Schmidt · Riegelsberg, DE
• Frank Hutter · Würzburg, DE
• Karl-Heinz Haas · Gerbrunn, DE
• Ernst Obermeier · Berlin, DE
• Ulrich Steger · Munich, DE
• Hanns-Erik Endres · Munich, DE
• Stephan Drost · Munich, DE

Key dates

• Filing date: Mar 23, 1987
• Grant date: Oct 31, 1989
• Expiry date: Mar 23, 2007

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/414
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A description is given of sensors in in the form of field effect transistors and capacitors which are suitable for qualitatively and quantitatively determining species to be analyzed, for example molecules or ions, in liquid or gaseous media. A special field of application is the selective determination of the presence and concentration of gases. The sensors are defined in that they have a sensitive layer consisting of a heteropolysiloxane.