Integrated circuit having a standard cell and method for forming
AssigneeFreescale Semiconductor, Inc.
InventorSavithri Sundareswaran
Life of this patent
Estimating the term…
Abstract
An integrated circuit includes a first plurality of transistors and a second plurality of transistors coupled together to form a standard cell that performs a logic function. Each of the first plurality of transistors is more critical to a speed of operation of the standard cell than any of the transistors of the second plurality of transistors. Each of the first plurality of transistors has a gate length longer than a gate length of any of the transistors of the second plurality of transistors.
Claims16
An integrated circuit, comprising:
- a first plurality of transistors and a second plurality of transistors coupled together to form a standard cell that performs a logic function;
- wherein:
- each of the first plurality of transistors is more critical to a speed of operation of the standard cell than any of the transistors of the second plurality of transistors;
- each of the first plurality of transistors has a gate length longer than a gate length of any of the transistors of the second plurality of transistors;
- the gate lengths of the first plurality of transistors are all a first dimension;
- and
- the gate lengths of the second plurality of transistors are all a second dimension.
A method of deriving a resulting standard cell from a beginning standard cell having a plurality of transistors having a first gate length, comprising:
- identifying transistors that are most critical to speed of the beginning standard cell;
- and
- altering a layout of the transistors that are most critical to speed by increasing the gate length of the transistors that are most critical to speed from the first gate length to a second gate length to form a layout of the resulting standard cell;
- and
- using the layout of the resulting standard cell to form the resulting standard cell, wherein the center point of the distribution for the resulting standard cell is slower than the center point of distribution for the beginning standard cell.
Dependencies are inferred from the claim text.