| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problems that charges are concentrated on the common electrode layer of a piezoelectric element member for taking out a common electrode to the outside, heat is generated and stable ink droplet discharge characteristics can not be obtained. <P>SOLUTION: On a base member 13, at least three piezoelectric element members 12 for which a plurality of piezoelectric element columns 12a and 12b are arrayed are lined and arrayed in the array direction of the piezoelectric element columns. The common electrode layer 23 of each piezoelectric element member 12 and the base member 13 are electrically conducted, and the common electrode layer 23 of the piezoelectric element member 122 at the center is taken out to the outside from the common electrode layer 23A for outside takeout of the common electrode layer 23 of the piezoelectric element member 121 positioned at the end in the array direction. The average resistance value of a conductive layer 41A between the part 23a of the common electrode layer 23 of the piezoelectric element member 121 positioned at the end and the base member 13 is made lower than the average resistance value of a conductive layer 41B between the part 23a of the common electrode layer 23 of the piezoelectric element member 122 at the center and the base member 13. <P>COPYRIGHT: (C)2010,JPO&INPIT |
