The thesis consisted of three parts. The first part introduced designed trend of the embedded passive component and the process flow of organic substrate. A design flow of spiral inductor embedded in 4 layer organic substrate has been demonstrated. Part 2 focused on the extraction equations of conventional PI model and modified T model. These two models have been applied to develop the equivalent circuits of the organic spiral inductors . The comparison between modeling and measurement results shows their difference on modeling accuracy. Part 3 introduced the scalable equations in both modeling techniques to find the equivalent circuit parameters from inductor¡¦s geometrical parameters. A 2.4GHz band-pass filter was simulated to illustrate the application of wide band scalable modeling techniques.