Interconnect structure of semiconductor device
First Claim
1. A semiconductor device allowing easy inspection of an interconnect, said semiconductor device comprising:
- a semiconductor substrate;
a plurality of interconnect layers overlying said semiconductor substrate having a plurality of individual interconnects therein, including a top interconnect layer, wherein at least one of said plurality of interconnect layers contains an interconnect to be inspected;
a plurality of interlayer dielectric films each disposed between adjacent two of said plurality of interconnect layers;
a top dielectric film disposed on said top interconnect layer; and
a dummy interconnect, said dummy interconnect comprising an inspection pad disposed on one of said interlayer dielectric films adjacent to but not connected with any interconnects in a corresponding interconnect layer and overlying said interconnect to be inspected, and an extension part connected between said inspection pad and said interconnect to be inspected but not connected to any other intervening interconnect.
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Accused Products
Abstract
An interconnect structure of a semiconductor device comprising: a semiconductor substrate; a plurality of interconnects including a subject interconnect; a plurality of interlayer dielectric films disposed between the adjacent interconnects; and a concave or convex portion formed on the surface of the semiconductor device corresponding to the desired portion of the subject interconnect is disclosed. When some deficiency is generated on the subject interconnect, the deficiency can be detected by measuring the corresponding concave or convex portion on the surface of the semiconductor for prompt inspection because the concave or convex portion is connected to the subject interconnect.
21 Citations
14 Claims
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1. A semiconductor device allowing easy inspection of an interconnect, said semiconductor device comprising:
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a semiconductor substrate;
a plurality of interconnect layers overlying said semiconductor substrate having a plurality of individual interconnects therein, including a top interconnect layer, wherein at least one of said plurality of interconnect layers contains an interconnect to be inspected;
a plurality of interlayer dielectric films each disposed between adjacent two of said plurality of interconnect layers;
a top dielectric film disposed on said top interconnect layer; and
a dummy interconnect, said dummy interconnect comprising an inspection pad disposed on one of said interlayer dielectric films adjacent to but not connected with any interconnects in a corresponding interconnect layer and overlying said interconnect to be inspected, and an extension part connected between said inspection pad and said interconnect to be inspected but not connected to any other intervening interconnect. - View Dependent Claims (2, 3, 4, 5)
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6. A semiconductor device allowing easy inspection of an interconnect, said semiconductor device comprising:
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a semiconductor substrate;
a plurality of interconnect layers overlying said semiconductor substrate having a plurality of individual interconnects therein, including a top interconnect layer, wherein said plurality of interconnect layers includes a plurality of interconnects to be inspected;
a plurality of interlayer dielectric films each disposed between adjacent two of said plurality of interconnect layers;
a top dielectric film disposed on said top interconnect layer; and
a plurality of dummy interconnects, each said dummy interconnect comprising an inspection pad connected to a corresponding one of said plurality of interconnects to be inspected and a corresponding extension part penetrating said dielectric films, wherein each of said inspection pads of said dummy interconnects is disposed on one of said plurality of interlayer dielectric films adjacent to said top dielectric film and adjacent to but not connected with any interconnects in a corresponding interconnect layer, and said corresponding extension part is not connected to any other intervening interconnect. - View Dependent Claims (7)
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8. A semiconductor device allowing easy inspection of a subject interconnect of an interconnect structure, said semiconductor device comprising:
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an undercoat dielectric film;
a plurality of interconnect layers overlying said undercoat dielectric film having a plurality of individual interconnects therein, including a top interconnect layer;
a plurality of interlayer dielectric films each disposed between respective interconnect layers of said plurality of interconnect layers, including a top dielectric film disposed on said top interconnect layer;
a dummy interconnect connected to a subject interconnect, wherein said subject interconnect is part of one of said plurality of interconnect layers, said dummy interconnect extends upward toward said top interconnect layer through said dielectric films from said subject interconnect for allowing simplified testing of the subject interconnect, and said dummy interconnect is not connected with any other interconnects in any intervening interconnect layer. - View Dependent Claims (9, 10, 11, 12, 13, 14)
an extension part integrally fomcd with, and in a same plane as, the subject interconnect, wherein said extension part is connected to said conductive plug.
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12. The semiconductor device according to claim 10, further comprising:
an extension part integrally formed with, and in a same plane as, the subject interconnect, wherein said extension part is connected to a bottom one of said at least two plug segments.
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13. The semiconductor device according to claim 9, wherein said top dielectric film has a convex or concave portion disposed above said subject interconnect for identifying a location of said subject interconnect.
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14. The semiconductor device according to claim 10, wherein said top dielectric film has a convex or concave portion disposed above said subject interconnect for identifying a location of said subject interconnect.
Specification