Standard cell library, method of designing semiconductor...

Details Standard cell library, method of designing semiconductor... Standard cell library, method of designing semiconductor...

2006-10-05

2008-12-23

Do, Thuan (Department: 2825)

Computer-aided design and analysis of circuits and semiconductor

Nanotechnology related integrated circuit design

C716S030000

Reexamination Certificate

active

07469389

ABSTRACT:
An exemplary cell library includes a first plurality of types of standard cells. Each of the first plurality of types of standard cells includes threshold voltage adjusting patterns. The upper and the lower boundaries of the threshold voltage adjusting patterns contact the upper and lower boundaries of the cell frame and the distances between the left and right boundaries of the threshold voltage adjusting patterns and the cell frame are set appropriately. Accordingly, it is possible to place standard cells including transistors with different threshold voltages at arbitrary positions without increasing the area of a circuit block or the design cost.

REFERENCES:
patent: 6295636 (2001-09-01), Dupenloup
patent: 6301692 (2001-10-01), Kumashiro et al.
patent: 6834375 (2004-12-01), Stine et al.
patent: A 2004-172627 (2004-06-01), None
patent: A 2005-072133 (2005-03-01), None

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