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Integrated circuit (IC) with a two-terminal diode device to protect metal- oxide-metal capacitors from ESD damage
Integrated circuit (IC) with a two-terminal diode device to protect metal- oxide-metal capacitors from ESD damage
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机译:具有两端二极管器件的集成电路(IC),用于保护金属氧化物金属电容器免受ESD损害
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摘要
An ESD protective clamp device comprised of a two-terminal diode formed in an isolated chip cell. The lower part of this chip cell region contains a buried layer of silicon with P-type dopant, and the upper part is an epitaxial layer also with P-type dopant. An annular (ring-shaped) anode plug segment is formed at the outer reaches of the epitaxial layer with P+ doping. At the interior central region is an N- type plug circular in horizontal cross-section and concentric with the annular plug. This central plug serves as the cathode. Electrical connections are made to anode and cathode to provide interconnection with an IC circuit with a MOM capacitor to be protected.
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