Invention Grant
US08405943B2 Circuit and method for power clamp triggered dual SCR ESD protection
有权
用于电源钳位的电路和方法触发双SCR ESD保护
- Patent Title: Circuit and method for power clamp triggered dual SCR ESD protection
- Patent Title (中): 用于电源钳位的电路和方法触发双SCR ESD保护
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Application No.: US13282179Application Date: 2011-10-26
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Publication No.: US08405943B2Publication Date: 2013-03-26
- Inventor: Ming-Hsiang Song , Jam-Wem Lee
- Applicant: Ming-Hsiang Song , Jam-Wem Lee
- Applicant Address: TW Hsin-Chu
- Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
- Current Assignee Address: TW Hsin-Chu
- Agency: Slater & Matsil, L.L.P.
- Main IPC: H02H3/22
- IPC: H02H3/22

Abstract:
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.
Public/Granted literature
- US20120037956A1 Circuit and Method for Power Clamp Triggered Dual SCR ESD Protection Public/Granted day:2012-02-16
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