Patent ID: 7102273
Filing Date: 2006-09-05
Classification: B41J,H01L

Abstract:
1. A piezoelectric element formation member, comprising: a substrate, in which first internal electrode layers and second internal electrode layers are alternately laminated while sandwiching piezoelectric layers therebetween, the first internal electrode layers being exposed to at least a first end face of the substrate, and the second internal electrode layers being exposed to at least a second end face of the substrate which is opposite to the first end face; a first external electrode layer formed on the first end face and a third end face connecting the first end face and the second end face, the first external electrode layer being electrically connected to the first internal electrode layers; and a second external electrode layer formed on at least the second end face and the third end face, the second external electrode layer being electrically connected to the second internal electrode layers, and being electrically independent from the first external electrode layer, wherein: the first external electrode layer and the first internal electrode layers are to be divided by slits extending from the first end face to form a plurality of piezoelectric elements arrayed in a first direction; a part of the first external electrode layer and a part of the second external electrode layer are adjacent in the first direction at a first region in the third end face, a first part of the second external electrode layer is disposed adjacent to a first side of the first external electrode layer on the third end face; a second part of the second external electrode layer is disposed adjacent to a second side of the first external electrode layer on the third end face; and a third part of the second external electrode layer is disposed on the second end face and connects the first part and second part so that the second external electrode layer on the second end face is formed except a region which is in the vicinity of a corner connecting the second end face and the third end face and opposing to the first external electrode layer.