Cylindrical embedded capacitors
First Claim
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1. A device comprising:
- a substrate having a first region and a second region;
a capacitor formed in the first region of the substrate and comprising;
a first capacitor plate;
a first insulation layer encircling the first capacitor plate;
a second capacitor plate encircling the first insulation layer, wherein each of the first capacitor plate, the first insulation layer, and the second capacitor plate extends from a front surface of the substrate to a back surface of the substrate;
a second insulation layer encircling the second capacitor plate; and
a third capacitor plate encircling the second insulation layer, wherein each of the second insulation layer and the third capacitor plate extends from the front surface to the back surface of the substrate;
metal lines and vias connecting the first capacitor plate to the third capacitor plate;
a through-substrate via (TSV) formed in the second region of the substrate and extending from the front surface to the back surface of the substrate, wherein the TSV and the second capacitor plate are formed of a same conductive material comprising same elements and same percentages of the elements; and
a second isolation layer between the TSV and the substrate.
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Abstract
A device includes a substrate having a front surface and a back surface opposite the front surface. A capacitor is formed in the substrate and includes a first capacitor plate; a first insulation layer encircling the first capacitor plate; and a second capacitor plate encircling the first insulation layer. Each of the first capacitor plate, the first insulation layer, and the second capacitor plate extends from the front surface to the back surface of the substrate.
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Citations
15 Claims
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1. A device comprising:
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a substrate having a first region and a second region; a capacitor formed in the first region of the substrate and comprising; a first capacitor plate; a first insulation layer encircling the first capacitor plate; a second capacitor plate encircling the first insulation layer, wherein each of the first capacitor plate, the first insulation layer, and the second capacitor plate extends from a front surface of the substrate to a back surface of the substrate; a second insulation layer encircling the second capacitor plate; and a third capacitor plate encircling the second insulation layer, wherein each of the second insulation layer and the third capacitor plate extends from the front surface to the back surface of the substrate; metal lines and vias connecting the first capacitor plate to the third capacitor plate; a through-substrate via (TSV) formed in the second region of the substrate and extending from the front surface to the back surface of the substrate, wherein the TSV and the second capacitor plate are formed of a same conductive material comprising same elements and same percentages of the elements; and a second isolation layer between the TSV and the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 10)
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7. A device comprising:
an interposer, wherein no active device is formed in the interposer, and wherein the interposer comprises; a silicon substrate having a first region and a second region; a capacitor formed in the first region of the silicon substrate and extending from a front surface to a back surface of the silicon substrate, wherein the capacitor comprises; a first capacitor plate; a first insulation layer encircling the first capacitor plate; and a second capacitor plate encircling the first insulation layer, wherein each of the first capacitor plate, the first insulation layer, and the second capacitor plate extends from the front surface to the back surface of the silicon substrate; a second insulation layer encircling the second capacitor plate; and a third capacitor plate encircling the second insulation layer, wherein each of the second insulation layer and the third capacitor plate extends from the front surface to the back surface of the silicon substrate; metal lines and vias connecting the first capacitor plate to the third capacitor plate; and a first isolation layer extending from the front surface to the back surface of the silicon substrate, wherein the isolation layer is between and contacting the silicon substrate and the capacitor. - View Dependent Claims (8, 9)
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11. A device comprising:
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a substrate having a first major surface and a second major surface, wherein the substrate comprises a semiconductor material; a capacitor having; an inner capacitor plate extending through the substrate from the first major surface through to the second major surface; a capacitor dielectric surrounding the inner capacitor plate and extending through the substrate from the first major surface through to the second major surface; and an outer capacitor plate surrounding the capacitor dielectric and extending through the substrate from the first major surface through to the second major surface; a first electrical contact on the first major surface and electrically contacting the inner capacitor plate; a second electrical contact on the first major surface and electrically contacting the outer capacitor plate; a first liner surrounding the outer capacitor plate and extending from the first major surface through to the second major surface; a conductive through via extending from the first major surface through to the second major surface; and a second liner surrounding the through via and extending from the first major surface through to the second major surface, wherein the first liner and the second liner are formed of a same dielectric material having same first elements and same percentages of the first elements, and wherein the second liner is in contact with the through via and the substrate. - View Dependent Claims (12, 13, 14, 15)
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Specification