Active solid-state devices (e.g. – transistors – solid-state diode – Integrated circuit structure with electrically isolated... – Passive components in ics
Reexamination Certificate
2006-10-27
2008-11-18
Pert, Evan (Department: 2826)
Active solid-state devices (e.g., transistors, solid-state diode
Integrated circuit structure with electrically isolated...
Passive components in ics
C257SE27116
Reexamination Certificate
active
07453136
ABSTRACT:
A capacitor array in an integrated circuit with active unit capacitor cells arranged amongst the dummy unit capacitor cells to provide visual and electrical symmetry. The electrical symmetry provides electrical matching between active unit capacitor cells and the visual symmetry provide process uniformity between the unit capacitor cells. Visual symmetry may be provided by uniform capacitor plate selection and uniform spacing between each. Electrical symmetry is provided by appropriately arranging active unit capacitors amongst dummy unit capacitors in the capacitor array. The capacitor array may be used in an integrated circuit such as for a equally weighted or binary weighted capacitor array or ladder in an analog to digital converter or a digital to analog converter. Methods and rules of layout for arranging the unit capacitors may be manually performed or automatically performed by computer aided design software.
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Hakkarainen Juha Mikko
Nurminen Juha Seppo
Blakely , Sokoloff, Taylor & Zafman LLP
Maxim Integrated Products Inc.
Pert Evan
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