Patent ID: 7001825
Filing Date: 2006-02-21
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 removing material along the second side of the substrate is performed such that the second conductive layer is largely flush with the second side of the substrate; wherein: the removal of the material is followed by etching the substrate along its second side; and the second conductive layer protrudes from the opening along the second side of the substrate after the etch.