STANDARD CELL, STANDARD CELL LIBRARY, SEMICONDUCTOR INTEGRATED CIRCUIT, AND ITS DESIGN METHOD

摘要

PROBLEM TO BE SOLVED: To provide a tap-less type standard cell arrangeable at an optional position without increasing a layout area and design cost; a standard cell library; a standard cell style semiconductor integrated circuit; and its design method.;SOLUTION: This standard cell has various types of patterns constituting transistors in a rectangular cell frame, and the pattern includes a threshold adjustment pattern for adding impurities adjusting the threshold voltages of the transistors arranged over nearly the whole of a constituent region of the transistors in the cell frame. Regions in predetermined ranges of the threshold adjustment patterns at four corners of the cell frame are removed at predetermined angles with respect to two sides corresponding to the respective corners of the cell frame to satisfy a design rule when the standard cells are arranged in contact with sides of the cell frame to match the positions of the corners of the cell frame therewith in the row direction, and the standard cells arranged in contact with the sides of the cell frame in the column direction, and included in the respective adjacent rows are arranged so that the corners corresponding to opposing corners of the cell frame contact each other.;COPYRIGHT: (C)2009,JPO&INPIT