Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Reexamination Certificate
2005-08-30
2005-08-30
Nguyen, Chau N. (Department: 2831)
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
C361S303000, C361S321100, C361S321500, C361S306100, C361S306300, C361S311000
Reexamination Certificate
active
06937457
ABSTRACT:
A decoupling capacitor with increased resistance to electrostatic discharge (ESD) is provided on an integrated circuit (IC). The capacitor may be single or multi-fingered. In one example, the capacitor includes first and second electrodes separated by a dielectric material, a source positioned proximate to the first electrode, and a floating drain positioned proximate to the first electrode and separated from the source by the first electrode. A parasitic element, modeled as a bipolar junction transistor (BJT), is formed by current interactions between the source, the floating drain, and a doped area. The floating drain provides a constant potential region at the base of the BJT, which minimizes ESD damage to the IC.
REFERENCES:
patent: 5371396 (1994-12-01), Vinal et al.
patent: 6320237 (2001-11-01), Assaderaghi et al.
patent: 6475838 (2002-11-01), Bryant et al.
patent: 6700771 (2004-03-01), Bhattacharyya
Chen Shui-Hung
Lee Jian-Hsing
Shih Jiaw-Ren
Ha Nguyen T.
Haynes and Boone LLP
Nguyen Chau N.
Taiwan Semiconductor Manufacturing Company , Ltd.
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