发明申请
US20100103570A1 Circuit and Method for Power Clamp Triggered Dual SCR ESD Protection
有权
电源钳位触发双SCR ESD保护的电路和方法
- 专利标题: Circuit and Method for Power Clamp Triggered Dual SCR ESD Protection
- 专利标题(中): 电源钳位触发双SCR ESD保护的电路和方法
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申请号: US12258946申请日: 2008-10-27
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公开(公告)号: US20100103570A1公开(公告)日: 2010-04-29
- 发明人: Ming-Hsiang Song , Jam-Wem Lee
- 申请人: Ming-Hsiang Song , Jam-Wem Lee
- 主分类号: H02H9/00
- IPC分类号: H02H9/00 ; H01L29/74
摘要:
Circuit and method for RC power clamp triggered dual SCR ESD protection. In an integrated circuit, a protected pad is coupled to an upper SCR circuit and a lower SCR circuit; and both are coupled to the RC power clamp circuit, which is coupled between the positive voltage supply and the ground voltage supply. A structure for ESD protection is disclosed having a first well of a first conductivity type adjacent to a second well of a second conductivity type, the boundary forming a p-n junction, and a pad contact diffusion region in each well electrically coupled to a pad terminal; additional diffusions are provided proximate to and electrically isolated from the pad contact diffusion regions, the diffusion regions and first and second wells form two SCR devices. These SCR devices are triggered, during an ESD event, by current injected into the respective wells by an RC power clamp circuit.