发明名称 |
Bond-pad integration scheme for improved moisture barrier and electrical contact |
摘要 |
An apparatus includes first and second electrodes separated by an insulative material (such as a piezoelectric material). The apparatus also includes a protective layer over the first and second electrodes. The protective layer has a first opening that exposes a portion of the first electrode and a second opening that exposes a portion of the second electrode. The apparatus further includes a first electrical contact at least partially within the first opening and electrically coupled to the first electrode. In addition, the apparatus includes a second electrical contact at least partially within the second opening and electrically coupled to the second electrode. Each of the first and second electrical contacts includes a stack of metal layers. The stack of metal layers includes a titanium nitride layer, a titanium layer over the titanium nitride layer, and an aluminum copper layer over the titanium nitride layer and the titanium layer. |
申请公布号 |
US9304283(B2) |
申请公布日期 |
2016.04.05 |
申请号 |
US201414533967 |
申请日期 |
2014.11.05 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
Soman Joel;Jiang Neng;Summerfelt Scott;Lassiter Thomas Warren;Mohammed Nayeemuddin;Roby Mary Alyssa Drummond |
分类号 |
G02B7/09;H01L21/3213;H04N5/232;C23F1/00 |
主分类号 |
G02B7/09 |
代理机构 |
|
代理人 |
Garner Jacqueline J.;Cimino Frank D. |
主权项 |
1. An apparatus comprising:
first and second electrodes separated by an insulative material; a protective layer over the first and second electrodes, the protective layer having a first opening that exposes a portion of the first electrode and a second opening that exposes a portion of the second electrode; a first electrical contact at least partially within the first opening and electrically coupled to the first electrode; and a second electrical contact at least partially within the second opening and electrically coupled to the second electrode; wherein each of the first and second electrical contacts comprises a stack of metal layers, the stack of metal layers comprising a titanium nitride layer, a titanium layer over the titanium nitride layer, and an aluminum copper layer over the titanium nitride layer and the titanium layer. |
地址 |
Dallas TX US |