Semiconductor structures having multiple conductive layers in an opening, and methods for fabricating same
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Abstract
In some embodiments, a circuit structure comprises a semiconductor substrate, an opening passing through the substrate between a first side of the substrate and a second side of the substrate, and a plurality of conductive layers in the opening. In some embodiments, one conductive layer provides an electromagnetic shield that shields the substrate from AC signals carried by a contact pad made from another conductive layer on a backside of the substrate. The conductive layers can also be used to form capacitor/rectifier networks. Manufacturing methods also provided.
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Citations
34 Claims
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1-29. -29. (canceled)
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30. A circuit manufacturing method comprising:
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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. - View Dependent Claims (31, 32, 33, 34)
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Specification