Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Reexamination Certificate
2005-12-20
2005-12-20
Dinkins, Anthony (Department: 2831)
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
C361S306300, C361S311000, C257S532000, C438S240000, C438S253000
Reexamination Certificate
active
06977805
ABSTRACT:
A dielectric layer is formed on a first metal layer, the dielectric layer is formed with many concave portions at the upper surface. A second metal layer is formed on the dielectric layer, the second metal layer is formed with a convex portion at a position corresponding to each of many concave portions. A capacitances is generated between the first and second metal layers. The capacitor element is composed of the first metal layer, the dielectric layer and the second metal layer. The first and second metal layers are used as power supply interconnection, the capacitor element is connected between a pair of power supply interconnections. Further, the first metal layer is connected to reference voltage, and the second metal layer is used as a pad electrode. By doing so, a capacitor element is connected between the pad electrode and the reference voltage.
REFERENCES:
patent: 5166904 (1992-11-01), Hazani
patent: P3193973 (2001-06-01), None
patent: P3209253 (2001-07-01), None
patent: P3307342 (2002-05-01), None
Sasaki Nobuyuki
Takada Shuichi
Dinkins Anthony
DLA Piper Rudnick Gray Cary USLLP
Kabushiki Kaisha Toshiba
Toshiba Solutions Corporation
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