Semiconductor device and method for fabricating the same
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Abstract
A semiconductor device comprises a first insulating film formed on a semiconductor substrate, a first metal pattern formed on the first insulating film, a second insulating film formed on the first metal pattern, a second metal pattern formed on the second insulating film, and a third metal pattern formed in the second insulating film and connecting between the first metal pattern and the second metal pattern. The third metal pattern is a single continuous structure, and the principal orientation axes of crystals of a metal constituting the third metal pattern are parallel to the principal surface of the semiconductor substrate.
59 Citations
67 Claims
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1-56. -56. (canceled)
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57. A method for fabricating a semiconductor device, said method comprising the steps of:
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forming a first insulating film on a semiconductor substrate; forming a first metal layer on the first insulating film; patterning the first metal layer to form at least one first interconnect and a first pad; forming a second insulating film on the first interconnect and the first pad; forming, in the second insulating film, at least one hole-like first opening exposing the first interconnect and a trench-like second opening exposing the first pad; in a common step, filling the first opening with a metal to form at least one first via connected to the first interconnect and filling the second opening with the metal to form a network via connected to the first pad; forming a second metal layer on the second insulating film, the first via and the network via; and patterning the second metal layer to form at least one second interconnect connected to the first via and a second pad connected to the network via, wherein the network via is a single continuous structure having a honeycomb structure. - View Dependent Claims (58, 59, 60, 61, 62, 63, 64, 65, 66, 67)
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Specification