发明名称 |
Piezoelectric device and method for manufacturing the same, piezoelectric actuator, liquid ejecting head, and liquid ejecting apparatus |
摘要 |
A piezoelectric device includes: a substrate; a first electrode formed over the substrate; a first piezoelectric element formed over the first electrode; a low density region which is formed at a side of the first piezoelectric element and has density lower than that of the first piezoelectric element; a second piezoelectric element which is formed to cover the first piezoelectric element and the low density region; and a second electrode formed over the second piezoelectric element. |
申请公布号 |
US8870352(B2) |
申请公布日期 |
2014.10.28 |
申请号 |
US201012962567 |
申请日期 |
2010.12.07 |
申请人 |
Seiko Epson Corporation |
发明人 |
Nakayama Masao;Hahiro Hideki |
分类号 |
B41J2/045;H01L41/09;H01L41/08;B41J2/16;H01L41/332;B41J2/14;H01L41/314 |
主分类号 |
B41J2/045 |
代理机构 |
Kilpatrick Townsend & Stockton LLP |
代理人 |
Kilpatrick Townsend & Stockton LLP |
主权项 |
1. A piezoelectric device defining an X direction, a Y direction generally transverse to the X direction, and a Z direction generally transverse to the X and Y directions, the piezoelectric device comprising:
a substrate disposed at a first layer in the Z direction; a first electrode disposed at a second layer, the second layer being disposed above the first layer in the Z direction, the first electrode being disposed above the substrate in the Z direction; a first piezoelectric element disposed at a third layer, the third layer being disposed above the second layer in the Z direction, the first piezoelectric element being disposed above the first electrode in the Z direction; a low density region disposed at the third layer, alongside the first piezoelectric element in an X-Y plane, wherein the low density region is disposed substantially at a same height in the Z direction as a height in the Z direction of the first piezoelectric element, wherein the low density region has density lower than a density of the first piezoelectric element; a second piezoelectric element which covers the first piezoelectric element and the low density region; and a second electrode disposed above the second piezoelectric element in the Z direction. |
地址 |
Tokyo JP |