Patent ID: 6041174
Filing Date: 2000-03-21
Classification: G06F

Abstract:
A method of simulating an oxidation enhanced diffusion for determining an impurity profile in a semiconductor structure, comprising the steps of:a) preparing a semiconductor structure having a first region of oxidizable material and a second region of oxide;b) virtually dividing said first region into a plurality of sub-regions;c) calculating an oxidizing velocity at a boundary between said first region and said second region;d) formulating an enhanced velocity of diffusion coefficient into a partial differential equation under boundary conditions containing said oxidizing velocity, said enhanced velocity of diffusion coefficient varying a diffusion coefficient in said first region depending upon a length from said boundary;e) solving said partial differential equation through a conversion into a discrete representation so as to determine said enhanced velocity of diffusion coefficient at nodes in said first region;f) calculating a variation of a diffusion coefficient on the basis of said enhanced velocity of diffusion coefficient;g) calculating said diffusion coefficient; andh) determining an impurity profile in the semiconductor structure based on the diffusion coefficient.