Non-volatile random access memory (NVRAM)
First Claim
1. A method of making a semiconductor device, the method comprising:
- forming a first transistor structure over a substrate;
forming a second transistor structure over the substrate;
forming a capacitor structure in a trench in the substrate between the first and second transistor structures, the capacitor structure comprising;
a heavily doped liner in the trench, the heavily doped liner having the same conductivity type as that of a source/drain portion of the first transistor structure and of a source/drain portion of the second transistor structure, the heavily doped liner electrically coupled to and contiguous with a bottom-most surface of the source/drain of the first transistor structure and contiguous with a bottom-most surface of the source/drain of the second transistor structure;
a dielectric layer adjacent to the heavily doped liner and below the top surface of the substrate; and
a conductive fill material over the dielectric layer in the trench;
forming a first conductive contact from the first transistor structure to a first bit line;
forming a second conductive contact from the second transistor to a first terminal of a non-volatile memory element; and
forming a third conductive contact from a second terminal of the non-volatile memory element to a second bit line used to access the non-volatile memory element,wherein the non-volatile memory element is in series between the second transistor and the second bit line.
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0 Petitions
Accused Products
Abstract
A semiconductor device and methods for making the same are disclosed. The device may include: a first transistor structure; a second transistor structure; a capacitor structure comprising a trench in the substrate between the first and second transistor structures, the capacitor structure further comprising a doped layer over the substrate, a dielectric layer over the doped layer, and a conductive fill material over the dielectric layer; a first conductive contact from the first transistor structure to a first bit line; a second conductive contact from the second transistor to a non-volatile memory element; and a third conductive contact from the non-volatile memory element to a second bit line.
20 Citations
13 Claims
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1. A method of making a semiconductor device, the method comprising:
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forming a first transistor structure over a substrate; forming a second transistor structure over the substrate; forming a capacitor structure in a trench in the substrate between the first and second transistor structures, the capacitor structure comprising; a heavily doped liner in the trench, the heavily doped liner having the same conductivity type as that of a source/drain portion of the first transistor structure and of a source/drain portion of the second transistor structure, the heavily doped liner electrically coupled to and contiguous with a bottom-most surface of the source/drain of the first transistor structure and contiguous with a bottom-most surface of the source/drain of the second transistor structure; a dielectric layer adjacent to the heavily doped liner and below the top surface of the substrate; and a conductive fill material over the dielectric layer in the trench; forming a first conductive contact from the first transistor structure to a first bit line; forming a second conductive contact from the second transistor to a first terminal of a non-volatile memory element; and forming a third conductive contact from a second terminal of the non-volatile memory element to a second bit line used to access the non-volatile memory element, wherein the non-volatile memory element is in series between the second transistor and the second bit line. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of making a semiconductor device, the method comprising:
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forming a first transistor structure over a substrate; forming a second transistor structure over the substrate; forming a capacitor structure in a trench in the substrate between the first and second transistor structures, a first plate of the capacitor structure comprising a heavily doped liner in the trench and below a top surface of the substrate, the heavily doped liner having a same conductivity type as that of a source/drain portion of the first transistor structure and of a source/drain portion of the second transistor structure, the heavily doped liner electrically coupled to and contiguous with a bottom-most surface of the source/drain portion of the first transistor structure and coupled to and contiguous with a bottom-most surface of the source/drain portion of the second transistor structure; forming a first conductive contact from the first transistor structure to a first bit line; forming a second conductive contact from the second transistor structure to a first terminal of a variable resistive element; and forming a third conductive contact from a second terminal of the variable resistive element to a second bit line used to access the variable resistive element, wherein the variable resistive element is in series between the second transistor and the second bit line. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification