Piezoelectric sensor element with at least two single crystal elements

US4667127A · kind A · utility

Assignee

• Avl Gesellschaft fur Verbrennungskraftmaschinen und Messtechnik m.b.H. Prof.Dr.Dr.h.c. Hans List · AT

Inventors

• Peter W. Krempl · Leibnitz, AT
• Johann Stubenberg · Feldbach, AT
• Alfred Enko · Graz, AT

Key dates

• Filing date: Jun 10, 1986
• Grant date: May 19, 1987
• Expiry date: Jun 10, 2006

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N30/85

Abstract

Individual single crystal elements stacked one above the other are aligned with their optical (Z) axes parallel to each other, and are provided with contact electrodes on opposite surfaces normal to their electrical (X) axes. Contact electrodes of the same polarity are conductively connected by two bridge electrodes that are applied to opposite sides of the assembled stack of individual crystal elements in the form of a conductive coating, and are provided with a lead leaving the sensor element. Contact electrodes of the opposite polarity are recessed in the vicinity of the bridge electrode serve the other polarity.