Patent ID: 8219963
Filing Date: 2012-07-10
Classification: G06F

Abstract:
1. A support apparatus for analysis and design of a semiconductor device, comprising: a storage section configured to store a set of a structure data indicating a structure of a transistor device and a measurement value of each of electric characteristics of said transistor; a concentration distribution setting section configured to set a function indicating an impurity concentration distribution in a channel region of a first transistor in a depth direction; a device property calculating section configured to express a Poisson's equation by using the function, to solve the expressed Poisson's equation by using a depletion layer width as a variable to calculate a surface potential, and to determine a first calculation value of the electric characteristic of the first transistor by using the surface potential; and a determining section configured to refer to said storage section based on a first structure data indicating a structure of the first transistor to read out a measurement value corresponding to the first structure data, to determine the function to indicate the impurity concentration distribution of the first transistor when the measurement value and the first calculation value are substantially coincident with each other, and to store the function in said storage section in relation to the structure data, wherein said concentration distribution setting section and said device property calculating section perform their operations until the first calculation value and the measurement value are substantially coincident with each other, wherein said device property calculating section refers to said storage section based on a second structure data indicating a structure of a second transistor to read out the function corresponding to the second structure data, expresses the Poisson's equation by using the read function, solves the expressed Poisson's equation by using a depletion layer width as a variable to calculate a surface potential, and to determine a second calculation value of the electric characteristic of the second transistor by using the surface potential, and said support apparatus further comprises: a circuit designing section configured to design a circuit using the second transistor based on the second calculation value.