Interconnection line capacitance solving method based on finite difference method

The invention discloses an interconnection line capacitance solving method based on a finite difference method, and belongs to the field of parasitic parameter extraction in an integrated circuit. According to the method, the traditional non-uniform grid division planning is improved, the traditional non-uniform grid division is that uniform fine division is carried out at a place with high electric field intensity, uniform coarse division is carried out at a place with low electric field intensity, or incremental non-uniform division is directly adopted, and the mode has the defect that electric field areas with different intensities cannot be well distinguished, so that the electric field areas with different intensities cannot be well divided. Gradient grid planing cannot be carried out according to the electric field intensity gradient. According to the self-adaptive non-uniform grid planning method, the problem is well solved, different dividing methods are adopted according to different to-be-divided le