Method for generating planar octagonal helical structure

Abstract

The invention provides a method for generating a planar octagonal helical structure. The method includes adopting layout parameters as input values on the premise of meeting layout design rules; setting the segmentation gradual change quantity; carrying out segmentation gradual change for the distance from an inner edge or an outer edge to an original point; obtaining inner edges or outer edges of various sections of various coils; simultaneously, setting a vertex offset quantity relative to a regular octagon; realizing vertex offset to obtain coordinates of various vertexes of the inner edges or outer edges of the coils and further forming a layout of the planar octagonal helical structure. Accordingly, no matter how the layout parameter values are adjusted or designed, a planar octagonal helical structure graph completely consistent to design values without deflection can be obtained.

Description

technical field [0001] The invention relates to the field of integrated circuit layout drawing, in particular to a method for generating a plane octagonal spiral structure. Background technique [0002] The use of inductors in various electronic circuits is quite common, and they have always existed in discrete structures. This discrete inductor is generally made in the structure of a solenoid, which has a large package volume and occupies a large area on the circuit board. area. With the development of integrated circuit technology and communication technology, integrated planar spiral inductor devices occupying a smaller area are rapidly being widely used in consumer electronics products with low power consumption, low cost, light weight and portable appeal. [0003] The current mainstream integrated inductors are usually fabricated on silicon (Si) substrates or gallium arsenide (GaAs) substrates together with integrated circuits using back-end metal layer interconnection...

AI Technical Summary

Problems solved by technology

[0006] In the commonly used quadrilateral and octagonal inductors, since the four vertices of each circle are right-angled vertices, each side of the quadrilateral inductor is kept parallel or vertical, so its layout drawing is not prone to graphic errors; however, compared with quadrilateral Inductors, the layout drawing of octagonal inductors is much more complicated. Since the inner diameter of the planar spiral inductor is constantly changing from the innermost circle to the outermost circle, the line segment of a certain inner diameter value of the inner circle must switch to another inner diameter value at a certain vertex. , so the algorithm for calculating the coordinates of the octagonal vertices directly determines the quality of the octagonal graphics

The existing algorithm can get a better inductance graph under certain sizes, but as the size changes, the coordinates of the vertices change, resulting in the phenomenon that the spacing of a certain section of the inductance coil becomes smaller and the lines overlap

It is difficult to achieve such a smaller pitch during production, and even if it is produced, the performance is far from the design index, which seriously affects the performance of RFIC.

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