Patent Document ID: 5502643
Application ID: 07991362
Patent Status: 1

Claim One:
1. A method of setting up process parameters which are used in a manufacturing process of a semiconductor device, comprising the steps of: (a) entering a plurality of process parameters; (b) calculating an impurity concentration C which will be observed in said semiconductor device using said process parameters, said impurity concentration C being a function of a position z within said semiconductor device; (c) judging whether said impurity concentration C has a predetermined value; (d) if a judgement at said step (c) is "No," updating said process parameters and repeating said steps (b) and (c) until said judgement at said step (c) becomes "Yes;" and (e) determining said process parameters with which said judgement at said step (c) is "Yes" as process parameters to be obtained, wherein said step (b) involves defining a boundary region between abutting first and second materials and performing a calculation using a model in which said impurity concentration C continuously varies with said position z across said boundary region.