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Van der Pauw’s function is often used in the measurement of a semiconductor’s resistivity.However,it is difficult to obtain its value from voltage measurements because it has an implicit form.If it can be expressed as a polynomial,a semiconductor’s resistivity can be obtained from such measurements.Normally,five orders of the abscissa can provide sufficient precision during the expression of any non-linear function.Therefore,the key is to determine the coefficients of the polynomial.By taking five coefficients as weights to construct a neuronetwork, neurocomputing has been used to solve this problem.Finally,the polynomial expression for van der Pauw’s function is obtained.
Van der Pauw’s function is often used in the measurement of a semiconductor’s resistivity. However, it is difficult to obtain its value from voltage measurements because it has an implicit form. It can be expressed as a polynomial, a semiconductor’s resistivity can be obtained from such measurements. Normally, five orders of the abscissa can provide sufficient precision during the expression of any non-linear function. Before, the key is to determine the coefficients of the polynomial. By taking five coefficients as weights to construct a neuronetwork, neurocomputing has been used to solve this problem. Finally, the polynomial expression for van der Pauw’s function is obtained.