Patent ID: 7761278
Filing Date: 2010-07-20
Classification: G06F

Abstract:
1. A method for modeling a semiconductor device, wherein stress is applied to the semiconductor device, the method comprising: generating, and storing in a system configured to store data, a dimension-scaling macro and a layout-dependency macro, wherein at least one intrinsic dimension of first model semiconductor devices is varied within said dimension-scaling macro, instances of at least one shape class with various shape dimensions are present around second model semiconductor devices in said layout-dependency macro, and each of said dimension-scaling macro and said layout-dependency macro are embodied as data in said system upon said storing; deriving a base model by fitting a first data set from said dimension-scaling macro and by employing a first fitting means embodied in said system; deriving an original stress model by fitting a second data set from said layout-dependency macro and by employing a second fitting means embodied in said system; re-fitting said original stress model to said first data set to calculate a dimension-dependent stress offset function; incorporating said dimension-dependent stress offset function into a re-fitted stress model wherein the refitted stress model employs a modified multiplier function, m′(L,G), having a mathematical form of m′(L,G)=P(L,G)/Pf{σ(L,0)}, wherein L is a set of at least one intrinsic dimension of said semiconductor device, G is a set of shape parameters, P(L,G) is a dimension and geometry dependent formula for a model parameter, σ(L,0) is a dimension dependent formula for stress on said first model semiconductor devices, and Pf{σ(L,0)} is a stress dependent formula for said model parameter in said re-fitted stress model evaluated at G=0; and generating by employing said system, and outputting from said system in a tangible medium, a simulation result for said model parameter of a semiconductor device, wherein said simulation result is given by said dimension and geometry dependent formula P(L,G).