Pearne & Gordon LLP
Ferroelectric element and actuator using the same, and ink jet head and ink jet recording device
A ferroelectric element is described which has a structure including a common electrode 11, a ferroelectric film 10 formed on the common electrode 11, an individual electrode 3 formed on the ferroelectric film 10, a lead wire 15 for feeding electric power to the individual electrode 3, which is formed on the same plane as of the individual electrode 3, and a protection film 16 entirely covering the exposed parts of the ferroelectric film 10 and the individual electrode 3, and covering the lead wire 15. The protection film 16 is preferably made of a material whose Young's modulus is smaller than that of the ferroelectric film 10, exactly 1/20 or smaller of the Young's modulus of the ferroelectric film 10. Further, the ferroelectric film is formed with the insulation reinforcing film containing at least one of the elements constituting the ferroelectric film.
Matsushita Electric Industrial Co., Ltd.
B B H B H
B41J B41J H01L B41J H01L
additional additional inventional inventional inventional
Shintaro Osamu Kazunari Takanori Shogo Kazuo
Hara Watanabe Chikanawa Nakano Matsubara Nishimura