Integrated circuit devices with metal-insulator-metal capacitors
First Claim
1. An integrated circuit device comprising:
- a microelectronic substrate;
a dielectric layer on the substrate;
a conductive contact plug extending through an opening in the dielectric layer to contact the substrate and including a widened pad portion extending onto the dielectric layer adjacent the opening;
an ohmic pattern on the pad portion of the plug;
a barrier pattern on the ohmic pattern;
a concave first capacitor electrode disposed on the barrier pattern and defining a cavity opening away from the substrate;
a capacitor dielectric layer conforming to a surface of the first capacitor electrode; and
a second capacitor electrode disposed on the capacitor dielectric layer opposite the first capacitor electrode.
1 Assignment
0 Petitions
Accused Products
Abstract
A conductive contact plug extends through an opening in the dielectric layer to contact the substrate and includes a widened pad portion extending onto the dielectric layer adjacent the opening. An ohmic pattern is disposed on the pad portion of the plug, and a barrier pattern is disposed on the ohmic pattern. A concave first capacitor electrode is disposed on the barrier pattern and defines a cavity opening away from the substrate. A capacitor dielectric layer conforms to a surface of the first capacitor electrode and a second capacitor electrode is disposed on the capacitor dielectric layer opposite the first capacitor electrode. Sidewalls of the ohmic pattern, the barrier pattern and the pad portion of the contact plug may be substantially coplanar, and the device may further include an etch stopper layer conforming to at least sidewalls of the ohmic pattern, the barrier pattern and the pad portion of the contact plug. Related fabrication methods are described.
11 Citations
28 Claims
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1. An integrated circuit device comprising:
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a microelectronic substrate; a dielectric layer on the substrate; a conductive contact plug extending through an opening in the dielectric layer to contact the substrate and including a widened pad portion extending onto the dielectric layer adjacent the opening; an ohmic pattern on the pad portion of the plug; a barrier pattern on the ohmic pattern; a concave first capacitor electrode disposed on the barrier pattern and defining a cavity opening away from the substrate; a capacitor dielectric layer conforming to a surface of the first capacitor electrode; and a second capacitor electrode disposed on the capacitor dielectric layer opposite the first capacitor electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 23, 24, 27)
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13. An integrated circuit device comprising:
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a microelectronic substrate; a dielectric layer on the substrate; a conductive contact plug extending through an opening in the dielectric layer to contact the substrate and including a widened pad portion extending onto the dielectric layer adjacent the opening; stacked ohmic and barrier patterns disposed on the pad portion of the plug and having sidewalls substantially coplanar with a sidewall of the pad portion; a first capacitor electrode disposed on the barrier pattern; a capacitor dielectric layer on the first capacitor electrode; and a second capacitor electrode on the capacitor dielectric layer opposite the first capacitor electrode. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 25, 26, 28)
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Specification