Active solid-state devices (e.g. – transistors – solid-state diode – Field effect device – Having insulated electrode
Reexamination Certificate
2006-09-26
2006-09-26
Wilson, Allan R. (Department: 2815)
Active solid-state devices (e.g., transistors, solid-state diode
Field effect device
Having insulated electrode
C257S532000, C257SE27048
Reexamination Certificate
active
07112838
ABSTRACT:
The present invention adds a plurality of substrate barriers for reducing substrate noise. The barriers, consisting of a plurality of equally sized n-well regions formed within the p-substrate, are formed between the analog and digital portions and on at least one side of sensitive analog circuits. A MOSFET transistor configured as a capacitor is formed within each of the n-well regions and is coupled between supply and circuit common to filter supply noise. A metal layer capacitor is formed above each MOSFET capacitor and is coupled between supply and circuit common. The present inventive circuit adds metallization to satisfy metal percentage requirements and to improve noise filtering. Each barrier region includes a plurality of coupled (shorted) n-wells with MOSFET transistors configured as capacitors. Additionally, in the described embodiment, the metallization layer is formed to create metal capacitors on top layers of the n-well regions to create additional noise filtering between supply and ground.
REFERENCES:
patent: 4570331 (1986-02-01), Eaton et al.
patent: 4959650 (1990-09-01), Moyal
patent: 5587329 (1996-12-01), Hseuh et al.
patent: 5654984 (1997-08-01), Hershbarger et al.
patent: 5870046 (1999-02-01), Scott et al.
patent: 6066537 (2000-05-01), Poh
patent: 6104794 (2000-08-01), Hein et al.
Geronaga Ernie
Wu Stephen
Broadcom Corporation
Garlick & Harrison & Markison
Harrison James A.
Wilson Allan R.
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