Capacitor and resistor having anodic metal and anodic metal oxide structure
First Claim
1. A passive device structure comprising a capacitor, the capacitor comprising:
- a first electrode;
a second electrode; and
a dielectric structure comprising a conductive layer and a dielectric layer between the first electrode and the second electrode, the dielectric layer comprising a metal oxide selected from the group consisting of aluminum oxide, niobium oxide, titanium oxide, tungstic oxide, zirconium oxide, and tantalum oxide, wherein the dielectric structure has a first width greater than a second width of the second electrode, the passive device structure further comprising a resistor, the resistor comprising;
a first contact;
a second contact, wherein the first electrode, the first contact, and the second contact are portions of a first metal layer;
a resistive structure electrically connected to the first contact and the second contact, the resistive structure comprising;
a conductive layer; and
a dielectric layer comprising a metal oxide selected from the group consisting of aluminum oxide, niobium oxide, titanium oxide, tungstic oxide, zirconium oxide, and tantalum oxide.
5 Assignments
0 Petitions
Accused Products
Abstract
An anodic metal layer, e.g., a tantalum layer, is deposited. An anodization mask is formed, the anodization mask exposing first portions of the tantalum layer and covering second portion of the tantalum layer. The exposed first portions of the tantalum layer are anodized to form a tantalum pentoxide layer. The amount of the tantalum layer converted to the tantalum pentoxide layer is precisely controlled by the applied anodization potential. Accordingly, the thicknesses of the remaining tantalum layer and the formed tantalum pentoxide layer are precisely controlled allowing the values of passive devices, e.g., resistors and capacitors, formed with the tantalum layer and/or the tantalum pentoxide layer to be precisely set.
25 Citations
19 Claims
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1. A passive device structure comprising a capacitor, the capacitor comprising:
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a first electrode; a second electrode; and a dielectric structure comprising a conductive layer and a dielectric layer between the first electrode and the second electrode, the dielectric layer comprising a metal oxide selected from the group consisting of aluminum oxide, niobium oxide, titanium oxide, tungstic oxide, zirconium oxide, and tantalum oxide, wherein the dielectric structure has a first width greater than a second width of the second electrode, the passive device structure further comprising a resistor, the resistor comprising; a first contact; a second contact, wherein the first electrode, the first contact, and the second contact are portions of a first metal layer; a resistive structure electrically connected to the first contact and the second contact, the resistive structure comprising; a conductive layer; and a dielectric layer comprising a metal oxide selected from the group consisting of aluminum oxide, niobium oxide, titanium oxide, tungstic oxide, zirconium oxide, and tantalum oxide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A passive device structure comprising a capacitor, a resistor, and an inductor, the capacitor comprising:
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a first electrode; a second electrode; and a dielectric structure comprising a conductive layer and a dielectric layer between the first electrode and the second electrode, the dielectric layer comprising a metal oxide selected from the group consisting of aluminum oxide, niobium oxide, titanium oxide, tungstic oxide, zirconium oxide, and tantalum oxide, the inductor comprising; a cross under; the resistor comprising; a first contact; a second contact, wherein the first electrode, the first contact, the second contact, and the cross under are portions of a first metal layer. - View Dependent Claims (14, 15, 16)
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17. A passive device structure comprising a capacitor, a resistor, and an inductor, the capacitor comprising:
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a first electrode; a second electrode; and a dielectric structure comprising a conductive layer and a dielectric layer between the first electrode and the second electrode, the dielectric layer comprising a metal oxide selected from the group consisting of aluminum oxide, niobium oxide, titanium oxide, tungstic oxide, zirconium oxide, and tantalum oxide, the inductor comprising; a cross under; a first trace; a first via electrically connecting the first trace to the cross under; a second trace; a second via electrically connecting the second trace to the cross under; and a conductor, wherein the resistor comprises; a first contact; a second contact; a resistive structure electrically connected to the first contact and the second contact, the resistive structure comprising; a conductive layer; an anodic metal layer comprising an anodic metal on the conductive layer of the resistive structure; and a dielectric layer on the anodic metal layer, the dielectric layer comprising a metal oxide selected from the group consisting of aluminum oxide, niobium oxide, titanium oxide, tungstic oxide, zirconium oxide, and tantalum oxide, wherein the conductive layer promotes adhesion of the anodic metal layer to the first contact and the second contact. - View Dependent Claims (18, 19)
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Specification