发明申请
- 专利标题: Noncontact localized electrochemical deposition of metal thin films
- 专利标题(中): 金属薄膜的非接触局部电化学沉积
-
申请号: US10933823申请日: 2004-09-02
-
公开(公告)号: US20060042953A1公开(公告)日: 2006-03-02
- 发明人: Suresh Ramarajan , Whonchee Lee
- 申请人: Suresh Ramarajan , Whonchee Lee
- 主分类号: C25D5/02
- IPC分类号: C25D5/02
摘要:
A method of selectively electroplating metal features on a semiconductor substrate having a conductive surface. An electrode assembly that includes a plurality of adjacent, mutually spaced and electrically isolated electrodes connected in series so as to be oppositely polarized when a voltage is applied thereacross is positioned over the substrate and an electrolyte solution is applied to the conductive surface. The electrode assembly and the conductive surface may be positioned in close proximity to, but without contacting, one another. A voltage is applied to the electrode assembly, which causes a metal film to selectively form on portions of the conductive surface that are positioned beneath an electrode exhibiting a positive polarity and, thus, negatively charged. Portions of the conductive surface positioned beneath electrodes exhibiting a negative polarity remain unplated. A DC power supply may be employed, the electrode polarity in such case being fixed or, alternatively, an AC power supply may be employed so as to cyclically vary electrode polarity and cause metal deposition beneath each electrode. An electroplating system is also disclosed.
公开/授权文献
信息查询