Place-and-route layout method with same footprint cells

Abstract

This invention discloses a method for automatically generating an integrated circuit layout, the method comprises determining a first cell height, creating a plurality of standard cells all having the first cell height, and generating the IC layout from the plurality of standard cells by placing and routing thereof. The method for generating the integrated circuit layout comprises the steps of marking a specific element by means of a markup layer so as to prepare a transition layout; and preparing a plurality of required layout variations through applying at least one logical operation on the transition layout so as to retrieve a database so as to generate a final integrated circuit layout, wherein the layout change variations comprises the conditions of widening the transistor channel length of a specific element and setting a virtual structure in the final integrated circuit layout. The invention improves the utilization of layout area of the integrated circuit. The element is able to be easily replaced because the arrangement of the element is in the grid. The circuits between elements are easily connected owing to contact alignment between elements.

Description

technical field [0001] The present invention relates to an automatic layout method for integrated circuits (IC), in particular to a method for determining placement and routing (Place- and-Route) method. Background technique [0002] Many integrated circuits (ICs), especially in application-specific integrated circuits (Application-Specific-Integrated Circuit, ASIC) and programmable field effect gate array (Field Programmable Gate Cell Blocks) to produce the desired layout. These automated tools place the aforementioned pre-built tiny component blocks and the in-circuit connections therebetween according to the designer's specification. [0003] figure 1 It is a schematic block diagram illustrating an existing conventional standard cell library (CellLibrary) 102 for making place and route layouts. In order to accommodate different driving capabilities (DrivingCapabilities), the existing conventional standard component library 102 may contain components with different hei...

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Problems solved by technology

[0005] It can be seen that the above-mentioned existing method for automatically generating integrated circuit layout obviously still has inconvenience and defects in method and use, and needs to be further improved urgently.

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and the general method has no suitable method to solve the above-mentioned problems. This is obviously related. The problem that the industry is eager to solve

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