Method of preparing multilayered piezoelectric ceramic material

US6964718B2 · kind B2 · utility

Assignee

• The Penn State Research Foundation · US

Inventors

• Clive A. Randall · State College, US
• Amanda Baker · Boalsburg, US
• Yi Fang · Orem, US
• Thomas R. Shrout · Laureldale, US
• Alfons Kelnberger · Stuttgart, DE

Key dates

• Filing date: Nov 16, 2001
• Grant date: Nov 15, 2005
• Expiry date: Apr 11, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/42

Abstract

Co-fired multilayer piezoelectric ceramic materials with base metal electrodes based on copper, copper alloy, are found as an effective approach to manufacture low cost multilayer piezoelectrics. The method of the invention is performed at low firing temperature and without the oxidation of base metal or reduction of ceramic components. A variety of ceramic materials may be used and copper is the preferred base metal in the multi-layer piezoelectric devices of the invention. This copper has additional protection against oxidation with a small inorganic coating on the surface. With such protection, the binder and other organics can also be efficiently removed and produce superior performance in the piezoelectric structured devices.