Library creating device and interconnect capacitance...

Details Library creating device and interconnect capacitance... Library creating device and interconnect capacitance...

2006-06-23

2009-02-24

Lin, Sun J (Department: 2825)

Computer-aided design and analysis of circuits and semiconductor

Nanotechnology related integrated circuit design

C716S030000, C716S030000, C716S030000

Reexamination Certificate

active

07496872

ABSTRACT:
An interconnect capacitance estimation system includes a first storage device, a library creating device and an interconnect capacitance estimating device. The first storage device stores layout data. The library creating device creates a library used for estimating a capacitance of a net in a semiconductor circuit based on the layout data. The interconnect capacitance estimating device estimates a capacitance of a target net in a target semiconductor circuit based on design data and the library. The library creating device calculates a logic cone size of a logic cone which is a combined circuit composing a signal path through which a signal from an input stage passes to an output stage, creates the library which relates a capacitance, the logic cone size and a fan-out. The interconnect capacitance estimating device calculates a logic cone size of a logic cone of the target net based on the design data, and estimates a capacitance of the target net based on the logic cone size of the target net and the table.

REFERENCES:
patent: 6378116 (2002-04-01), Ginetti
patent: 6405345 (2002-06-01), Ginetti
patent: 6622291 (2003-09-01), Ginetti
patent: 9-134380 (1997-05-01), None

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