Through silicon via with dummy structure and method for forming the same
First Claim
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1. A through silicon via (TSV) structure, comprising:
- a top pad;
a vertical conductive post connected to the top pad, wherein the top pad covers a wider area than a cross section of the vertical conductive post;
an interconnect pad connected to the top pad and at least partially below the top pad;
an under layer at least partially below the top pad; and
at least one dummy structure connecting the top pad and the under layer to fasten the top pad and the interconnect pad.
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Abstract
A through silicon via structure includes a top pad and a vertical conductive post that is connected to the top pad. The top pad covers a wider area than the cross section of the vertical conductive post. An interconnect pad is formed at least partially below the top pad. An under layer is also formed at least partially below the top pad. At least one dummy structure connects the top pad and the under layer to fasten the top pad and the interconnect pad.
30 Citations
10 Claims
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1. A through silicon via (TSV) structure, comprising:
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a top pad; a vertical conductive post connected to the top pad, wherein the top pad covers a wider area than a cross section of the vertical conductive post; an interconnect pad connected to the top pad and at least partially below the top pad; an under layer at least partially below the top pad; and at least one dummy structure connecting the top pad and the under layer to fasten the top pad and the interconnect pad. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An integrated circuit having a through silicon via structure, comprising:
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a substrate; a top pad over the substrate; a vertical conductive post connected to the top pad and at least partially through the substrate, wherein the top pad covers a wider area than a cross section of the vertical conductive post; an interconnect pad connected to the top pad and at least partially below the top pad; an under layer at least partially below the top pad; and at least one dummy structure connecting the top pad and the under layer to fasten the top pad and the interconnect pad.
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Specification