Electrochemical sensor

US6613205B1 · kind B1 · utility

Assignee

• F. Hoffmann-La Roche AG · CH

Inventors

• Gregor Steiner · Titisee, DE
• Bernhard Schaffar · Graz, AT
• Marie-Luise Schinnerl · Semriach, AT
• Christoph Ritter · Sorocaba, BR

Key dates

• Filing date: Mar 3, 2000
• Grant date: Sep 2, 2003
• Expiry date: Mar 3, 2020

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/3272
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An electrochemical sensor includes an electrochemically active sensor layer (sensor spot), which is applied by means of thick film techniques in at least one region of an electrically insulating, planar substrate, the surface of the sensor layer being brought into contact in a measuring area with the aqueous sample to be determined. At least one conductive path for signal pick-up is also applied on the substrate by means of thick film techniques. The sensor layer contains at least one oxide of metal from subgroups 7 and 8 wof the Periodic Table as sensor component. The contact between the electrochemically active sensor layer and the conductor is effected via an electrically conductive bridge layer which extends from the measuring area in a direction essentially parallel to the surface of the substrate. The bridge layer consists of corrosion-resistant material.