发明授权
- 专利标题: Structure to measure both interconnect resistance and capacitance
- 专利标题(中): 测量互连电阻和电容的结构
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申请号: US10759400申请日: 2004-01-16
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公开(公告)号: US07900164B1公开(公告)日: 2011-03-01
- 发明人: Shuxian Chen , Jeffrey T. Watt
- 申请人: Shuxian Chen , Jeffrey T. Watt
- 申请人地址: US CA San Jose
- 专利权人: Alters Corporation
- 当前专利权人: Alters Corporation
- 当前专利权人地址: US CA San Jose
- 代理机构: Morgan, Lewis & Bockius LLP
- 主分类号: G06F17/50
- IPC分类号: G06F17/50
摘要:
A structure for measuring both interconnect resistance and capacitance. The structure comprises a plurality of metallic interconnects, a first circuit for measuring capacitance charging current at a first interconnect and a second circuit for measuring the voltage drop between two positions at a second interconnect. The first circuit includes two electrically connected pseudo-inverters. Two control signals are fed into the two pseudo-inverters such that their associated capacitances are charged and discharged periodically. The first interconnect capacitance is determined by measuring the difference of charging currents between the two pseudo-inverters. A constant current flows through the second circuit and the interconnect resistance is determined by the voltage drop and the constant current.
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