Abstract:
An electroplating etching apparatus includes a power supply to output current, and a container configured to contain an electrolyte. A cathode is coupled to the container and configured to fluidly communicate with the electrolyte. An anode is electrically connected to the output, and includes a graphene layer. A metal substrate layer is formed on the graphene layer, and is etched from the graphene layer in response to the current flowing through the anode.
Abstract:
Self-aligned carbon nanostructure field effect transistor structures are provided, which are foamed using selective dielectric deposition techniques. For example, a transistor device includes an insulating substrate and a gate electrode embedded in the insulating substrate. A dielectric deposition-prohibiting layer is formed on a surface of the insulating substrate surrounding the gate electrode. A gate dielectric is selectively formed on the gate electrode. A channel structure (such as a carbon nanostructure) is disposed on the gate dielectric A passivation layer is selectively formed on the gate dielectric. Source and drain contacts are formed on opposing sides of the passivation layer in contact with the channel structure. The dielectric deposition-prohibiting layer prevents deposition of dielectric material on a surface of the insulating layer surrounding the gate electrode when selectively forming the gate dielectric and passivation layer.
Abstract:
A device and method for device fabrication include forming a buried gate electrode in a dielectric substrate and patterning a stack having a high dielectric constant layer, a carbon-based semi-conductive layer and a protection layer over the buried gate electrode. An isolation dielectric layer formed over the stack is opened to define recesses in regions adjacent to the stack. The recesses are etched to form cavities and remove a portion of the high dielectric constant layer to expose the carbon-based semi-conductive layer on opposite sides of the buried gate electrode. A conductive material is deposited in the cavities to form self-aligned source and drain regions.
Abstract:
An electroplating etching apparatus includes a power to output current, and a container configured to contain an electrolyte. A cathode is coupled to the container and configured to fluidly communicate with the electrolyte. An anode is electrically connected to the output, and includes a graphene layer. A metal substrate layer is formed on the graphene layer, and is etched from the graphene layer in response to the current flowing through the anode.
Abstract:
A method of fabricating a semiconducting device is disclosed. A carbon nanotube is deposited on a substrate of the semiconducting device. A first contact on the substrate over the carbon nanotube. A second contact on the substrate over the carbon nanotube, wherein the second contact is separated from the first contact by a gap. A portion of the substrate in the gap between the first contact and the second contact is removed.
Abstract:
Techniques for employing different channel materials within the same CMOS circuit are provided. In one aspect, a method of fabricating a CMOS circuit includes the following steps. A wafer is provided having a first semiconductor layer on an insulator. STI is used to divide the first semiconductor layer into a first active region and a second active region. The first semiconductor layer is recessed in the first active region. A second semiconductor layer is epitaxially grown on the first semiconductor layer, wherein the second semiconductor layer comprises a material having at least one group III element and at least one group V element. An n-FET is formed in the first active region using the second semiconductor layer as a channel material for the n-FET. A p-FET is formed in the second active region using the first semiconductor layer as a channel material for the p-FET.
Abstract:
The present disclosure reduces and, in some instances, eliminates the density of interface states in III-V compound semiconductor materials by providing a thin crystalline interlayer onto an upper surface of a single crystal III-V compound semiconductor material layer to protect the crystallinity of the single crystal III-V compound semiconductor material layer's surface atoms prior to further processing of the structure.
Abstract:
A method includes providing a wafer that has a semiconductor layer having an insulator layer disposed on the semiconductor layer. The insulator layer has openings made therein to expose a surface of the semiconductor layer, where each opening corresponds to a location of what will become a transistor channel in the semiconductor layer disposed beneath a gate stack. The method further includes depositing a high dielectric constant gate insulator layer so as to cover the exposed surface of the semiconductor layer and sidewalls of the insulator layer; depositing a gate metal layer that overlies the high dielectric constant gate insulator layer; and implanting Carbon through the gate metal layer and the underlying high dielectric constant gate insulator layer so as to form in an upper portion of the semiconductor layer a Carbon-implanted region having a concentration of Carbon selected to establish a voltage threshold of the transistor.
Abstract:
A device and method for device fabrication includes forming a buried gate electrode in a dielectric substrate and patterning a stack that includes a high dielectric constant layer, a carbon-based semi-conductive layer and a protection layer over the buried gate electrode. An isolation dielectric layer formed over the stack is opened to define recesses in regions adjacent to the stack. The recesses are etched to form cavities and remove a portion of the high dielectric constant layer to expose the carbon-based semi-conductive layer on opposite sides of the buried gate electrode. A conductive material is deposited in the cavities to form self-aligned source and drain regions.
Abstract:
A fin structure including a vertical alternating stack of a first isoelectric point material layer having a first isoelectric point and a second isoelectric material layer having a second isoelectric point less than the first isoelectric point is formed. The first and second isoelectric point material layers become oppositely charged in a solution with a pH between the first and second isoelectric points. Negative electrical charges are imparted onto carbon nanotubes by an anionic surfactant to the solution. The electrostatic attraction causes the carbon nanotubes to be selectively attached to the surfaces of the first isoelectric point material layer. Carbon nanotubes are attached to the first isoelectric point material layer in self-alignment along horizontal lengthwise directions of the fin structure. A transistor can be formed, which employs a plurality of vertically aligned horizontal carbon nanotubes as the channel.