Semiconductor device and fabrication method thereof

Active solid-state devices (e.g. – transistors – solid-state diode – Integrated circuit structure with electrically isolated... – Passive components in ics

Reexamination Certificate

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C257S528000

Reexamination Certificate

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07470969

ABSTRACT:
A semiconductor device and a fabrication method thereof in which the semiconductor device includes capacitors having a metal/insulator/metal (MIM) structure are disclosed. The method includes forming an interlayer insulating film on a structure of a semiconductor substrate that exposes lower wiring and a lower insulating film; selectively etching the interlayer insulating film to form a first electrode opening that exposes the lower wiring; forming a first electrode in the first electrode opening such that the first electrode opening is filled; selectively etching the interlayer insulating film at a region of the same adjacent to the first electrode to thereby form a second electrode opening; forming a dielectric layer along inner walls that define the second electrode opening; forming a second electrode on the dielectric layer in such a manner to fill the second electrode opening; and forming upper wiring on at least a portion of the second electrode.

REFERENCES:
patent: 6088070 (2000-07-01), Ohtani et al.
patent: 6500724 (2002-12-01), Zurcher et al.
patent: 2002/0155676 (2002-10-01), Stetter et al.
patent: 2003/0002238 (2003-01-01), Toyoda

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