Patent ID: 6844241
Filing Date: 2005-01-18
Classification: H01L,Y10S

Abstract:
1. A circuit manufacturing method comprising: providing a structure in which an opening extends into a first side of a semiconductor substrate having a second side opposite the first side such that the opening penetrates partway through the substrate, a plurality of conductive layers overlay one another in the opening, and the conductive layers include a first conductive layer and a second conductive layer overlaying the first conductive layer such that the first and second conductive layers (i) are separated by insulating material in the opening, or (ii) form a P-N junction in the opening, or (iii) form a Schottky junction in the opening; removing material along the second side of the substrate to reach the opening and expose the second conductive layer from the second side of the substrate; wherein the first conductive layer in the opening shields the substrate from an electromagnetic field created by an AC signal carried by the second conductive layer in the opening during circuit operation.