Patent ID: 7533356

Claim:
A parameter adjusting device adopting HiSIM (Hiroshima-university STARC IGFET Model), which is a surface potential model wherein a formula for analysis is derived based on surface potential as a circuit design model of a semiconductor element; defining a chromosome with genes as a respective great number of parameters of the circuit design model of the semiconductor element; and optimizing said parameters using a genetic algorithm based on property measured data of the tested semiconductor element, comprising: first portion parameter adjusting means for at least adjusting a part of the parameters in a technological parameter group in the HiSIM which is the parameters determining the structure of the semiconductor element using the genetic algorithm based on the property measured data of the semiconductor element belonging to a long channel group, and a part of the parameters in a mobility parameter group which is determined by the determination of a part of the parameters in the technological parameter group; and second portion parameter adjusting means for adjusting a part of the parameters adjusted by the first portion parameter adjusting means and the parameters which require adjustment, excepting the parameters being adjusted by said first portion parameter adjusting means using the genetic algorithm based on the property measured data of various length of channels, with reference to an adjustment result of said first parameter adjusting means, and said first and second portion parameter adjusting means, comprising child chromosome gene determination means for obtaining the center of gravity in a vector space of a parent chromosome group, in crossover processing of the genetic algorithm, and determining genes of a child chromosome inside a hyperpolyhedron in the vector space which is determined by values of said center of gravity and the parent chromosome group.