A layout method, electronic device, and computer-readable storage medium

Abstract

A layout method, an electronic device, and a computer-readable storage medium. The layout method includes the following steps: in the global layout optimization, using the initial objective function to iterate the obtained unit information to obtain the optimal solution of the initial position of the unit in the global layout; introducing different A cost function; according to the introduced cost function and the optimal solution, the cell row alignment is performed in the objective function. The layout method of the present invention can realize the optimization of line length and density, and at the same time help various mixed-height units to be basically aligned in rows, and partially solve the legalization problem in a global optimization manner.

Description

technical field [0001] The invention relates to the technical field of semiconductor integrated circuit design, in particular to a design method for a mixed-height cell layout in the back-end layout of a semiconductor integrated circuit design tool. Background technique [0002] In the design of semiconductor integrated circuits, single-height standard cells have been mainly used in the past. With the advancement of process nodes, standard cells of different heights (such as standard cells with double height, triple height and other multiple heights) are getting more and more applications due to their advantages in driving capability, timing, and tangleability. application. Layout of mixed-height cells is becoming an increasingly important issue in back-end layout tool development. [0003] Although the multi-height (MH) unit is higher than the single-height (Single Height, SH) unit, it is still a standard unit, and its layout requires a certain degree of flexibility, so i...

AI Technical Summary

Problems solved by technology

In this method, the multiple-height units occupy the layout resources first, which is not conducive to the global optimization of line length, density, timing and other indicators.

[0006] It can be seen that the method of round-by-round legalization in the detailed layout stage needs to be distinguished by height. Multi-round legalization not only requires more running time, but also makes it difficult to consider various mixed heights at the same time; if it is legal in the global layout stage If the multi-height unit is changed, the multi-height unit and the single-height unit are still placed one after the other, so it is not conducive to the realization of global optimization

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