Patent ID: 7617056

Claim:
A parameter extraction method comprising: a step of inputting a first value to one of parameters of a model formula of a transistor, by a computer; a step of calculating calculation values by using the model formula by the computer, wherein the calculation values are obtained by changing a variable of the model formula without changing the parameters, the calculation values correspond to drain currents of a transistor, and the variable corresponds to a gate voltage of the transistor; and a step of evaluating the first value by evaluating degree of a match between actual measurement values and the calculation values by the computer, wherein the actual measurement values are obtained by measuring output currents of a transistor with a gate voltage changed, wherein the degree of the match between the actual measurement values and the calculation values is evaluated by a second value corresponding to an area of a portion sandwiched between a connecting line of the actual measurement values shown with logarithm and a connecting line of the calculation values shown with logarithm.