Patent Document ID: 5504016
Application ID: 08323605
Patent Flag: 1

Claim One:
1. A method of fabricating a semiconductor device having a desired distribution of dopant species within a semiconductor material, the method comprising: (a) selecting a plurality of dopant species to be distributed within the semiconductor material; (b) representing a force experienced by a first dopant species of a pair of the plurality of dopant species at a given point in the semiconductor material at a given time due to its interactions with a second dopant species of the pair of dopant species by a force term, wherein the force term is substantially equal to the product of a dopant-dopant interaction force factor and the difference between the amount of the second dopant species extending in one direction from the given point and the amount of the second dopant species extending in an opposite direction from the given point; (c) selecting a set of process parameters to be used in modeling the fabrication of the semiconductor device, wherein the set of process parameters are representative of those specified during the fabrication of the semiconductor device; (d) generating a diffusion equation of the form ##EQU22## where .differential. is a partial derivative of the indicated variable, C is the distribution profile of one of the dopant species in the pair of dopant species, D is a diffusion coefficient of the dopant species having a distribution profile C, .gradient. C is a gradient of C, .gradient. .multidot. is an operator representing a divergence of the indicated variable, and J is a flux density term which is proportional to the force term described in (b); (e) solving the diffusion equation formed in (d), thereby determining an expected distribution profile for one of the plurality of dopant species; (f) repeating steps (b) through (e) of the method until the expected distribution for said one of the plurality of dopant species is approximately equal to the desired distribution of that dopant species; and (g) fabricating the semiconductor device based on the process parameters which produced the expected distribution which is approximately equal to the desired distribution of that dopant species.