Patent ID: 6031982
Filing Date: 2000-02-29
Classification: H01L

Abstract:
A library of function cells for designing a layout for at least part of an integrated circuit, each function cell comprising at least one implementation of a basic cell formable from semiconductor material, each basic cell implementation comprising a plurality of unconnected transistors configured in a transistor pattern largely identical to, or largely a mirror image of, the transistor pattern in each other basic cell implementation, transistors of a given polarity type in each basic cell implementation being of at least two different current-carrying capabilities of which one of the current-carrying capabilities is at least 10 times another of the current-carrying capabilities, each function cell also having an electrical interconnection network for electrically interconnecting the transistors of that function cell in a physical pattern different from the transistors in each other function cell such that each function cell, except a substantial mirror image of that function cell, performs a different electronic function.