The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 27, 2006
Filed:
Jul. 08, 2003
Hans-jurgen Schreiner, Neunkirchen am SandRollhofen, DE;
Reiner Bindig, Bindlach, DE;
Jurgen Schmieder, Lauf, DE;
Hans-Jurgen Schreiner, Neunkirchen am SandRollhofen, DE;
Reiner Bindig, Bindlach, DE;
Jurgen Schmieder, Lauf, DE;
Ceramtec AG Innovative Ceramic Engineering, Plochingen, DE;
Abstract
The invention relates to a method for the manufacture of piezoelectric multilayer actuator in which thin layers of a piezoceramic material, called 'green leaves' on which at least one internal electrode is applied, are stacked to form a block such that the internal electrodes are guided in alternation to oppositely lying surfaces of the actuator, where they become bound together by an external electrode, the actuator compact being sintered and subjected to abrasive shaping, and then the base metallization is applied for the external electrode. In order to achieve insulation with a ceramic layer which can be applied after the sintering and the abrasive shaping, and thus satisfy even stringent requirements, it is proposed that areas to be insulated be coated by thick-layer methods with a paste consisting of an inorganic, low-sintering material or a mixture of materials and an organic binder system, and be then subjected to a burning-on process, the coating thickness after the sintering being between 1 and 40 μm, preferably between 2 and 20 μm, or between 4 and 15 μm.