Correction of the Method of Images for Partial Inductance Calculations of QFP

The inapplicability of the method of images to partial inductance calculation within the magneto-quasi-static approximation has been shown by the authors in previous works. This concept is restated in this paper, and some correction terms for the application of the method of images are proposed. A partial inductance calculation technique based on potential theory is also proposed, which does not require the calculation of the current distribution, and is limited at present to infinite perfectly conducting planes. The proposed correction terms are verified with simple structures at first, and later with the calculation of the partial inductance matrix of a quad flat package.