Patent ID: 6531806
Filing Date: 2003-03-11
Classification: H03H

Abstract:
A chip-type piezoelectric component comprising:a piezoelectric element including two major surfaces; vibration electrodes and terminal electrodes connected to the vibration electrodes and provided on the two major surfaces of the piezoelectric element; at least two adhesive layers each provided on a respective one of the major surfaces of the piezoelectric element at least excluding the vibration electrode area; and a laminated body including at least two seal substrates bonded via the at least two adhesive layers with the piezoelectric element disposed between the at least two seal substrates; external electrodes arranged to extend the terminal electrodes out to the side surfaces at an end of the laminated body; wherein each of the opposite ends of each of the at least two adhesive layers and the at least two seal substrates have recesses formed therein, wherein the recesses in the at least two adhesive layers and the at least two seal substrates are aligned with each other at opposite ends of the laminated body and expose opposite end portions of the piezoelectric element which does not have any recesses formed therein; the external electrodes are continuously provided along the direction of thickness on the side surfaces at the opposite ends of the laminated body, and are defined by a monolithic conductive film embedded in the recesses in the opposite ends of the at least two adhesive layers and the at least two seal substrates such that the exposed opposite end portions of the piezoelectric element are surrounded by the conductive film material on portions of three surfaces at each of the opposite end portions of the piezoelectric element.