Invention Grant
US08357584B2 Metal capacitor design for improved reliability and good electrical connection
有权
金属电容设计,提高可靠性和良好的电气连接
- Patent Title: Metal capacitor design for improved reliability and good electrical connection
- Patent Title (中): 金属电容设计,提高可靠性和良好的电气连接
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Application No.: US12615796Application Date: 2009-11-10
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Publication No.: US08357584B2Publication Date: 2013-01-22
- Inventor: Jianhong Zhu , James F. Buller
- Applicant: Jianhong Zhu , James F. Buller
- Applicant Address: KY Grand Cayman
- Assignee: Globalfoundries Inc.
- Current Assignee: Globalfoundries Inc.
- Current Assignee Address: KY Grand Cayman
- Agency: Ditthavong Mori & Steiner, P.C.
- Main IPC: H01L21/20
- IPC: H01L21/20

Abstract:
A metal capacitor is formed with good conductivity for both nodes of the capacitor and improved reliability. An embodiment includes a first layer of alternating first and second metal lines, a second layer of alternating third and fourth metal lines, a dielectric layer between the first and second layers, and vias in the dielectric layer connecting the first and second metal lines with the third and fourth metal lines, respectively, wherein each metal line comprises alternating first segments having a first width and second segments having a second width, the first width being greater than the second width, each first segment lying adjacent to a second segment of an adjacent metal line, and only first segments of the metal lines overlapping the vias. The design enables the spacing between metal lines to be maintained, the spacing between via to metal to be increased, and via connection to be maintained for both nets, thereby improving the conductivity and reliability of the capacitor and maintaining capacitance density.
Public/Granted literature
- US20110108949A1 METAL CAPACITOR DESIGN FOR IMPROVED RELIABILITY AND GOOD ELECTRICAL CONNECTION Public/Granted day:2011-05-12
Information query
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