发明名称 |
Passivation of ring electrodes |
摘要 |
An inkjet device includes a pumping chamber bounded by a wall, a piezoelectric layer disposed above the pumping chamber, a ring electrode having an annular lower portion disposed on the piezoelectric layer. A moisture barrier layer covers a remainder of the piezoelectric layer over the pumping chamber that is not covered by the annular lower portion of the ring electrode. |
申请公布号 |
US8851637(B2) |
申请公布日期 |
2014.10.07 |
申请号 |
US201313781120 |
申请日期 |
2013.02.28 |
申请人 |
FUJIFILM Corporation |
发明人 |
Li Youming;Hishinuma Yoshikazu;Birkmeyer Jeffrey |
分类号 |
B41J2/45;B41J2/045 |
主分类号 |
B41J2/45 |
代理机构 |
Fish & Richardson P.C. |
代理人 |
Fish & Richardson P.C. |
主权项 |
1. An inkjet device, comprising:
a pumping chamber bounded by a wall; a piezoelectric layer disposed above the pumping chamber; a ring electrode having an annular lower portion and an annular upper portion, the annular lower portion being disposed on the piezoelectric layer; and a moisture barrier layer covering a remainder of the piezoelectric layer over the pumping chamber that is not covered by the annular lower portion of the ring electrode, wherein: the annular upper portion of the ring electrode includes an annular inner upper portion and an annular outer upper portion; the annular lower portion of the ring electrode includes an annular inner lower portion and an annular outer lower portion; the annular inner upper portion extends inwardly from the annular inner lower portion to cover a portion of the moisture barrier layer surrounded by the annular inner lower portion; and the annular outer upper portion extends outwardly from the annular outer lower portion to cover a portion of the moisture barrier layer that surrounds the annular outer lower portion. |
地址 |
Tokyo JP |