摘要:
A low-k dielectric material for use in the manufacture of semiconductor devices, semiconductor structures using the low-k dielectric material, and methods of forming such dielectric materials and fabricating such structures. The low-k dielectric material comprises carbon nanostructures, like carbon nanotubes or carbon buckyballs, that are characterized by an insulating electronic state. The carbon nanostructures may be converted to the insulating electronic state either before or after a layer containing the carbon nanostructures is formed on a substrate. One approach for converting the carbon nanostructures to the insulating electronic state is fluorination.
摘要:
A combined wide-image and loop-cutter pattern is provided for both cutting and forming a wide-image section to a hard mask on a substrate formed by sidewall imaging techniques in a reduced number of photolithographic steps. A single mask is formed which provides a wide mask section while additionally providing a mask to protect the critical edges of an underlying hard mask during hard mask etching. After the hard mask is cut into sections, the protective portions of the follow-on mask are removed to expose the critical edges of the underlying hard mask while maintaining shapes necessary for defining wide-image sections. Thus, the hard mask cutting, hard mask critical edge protecting, and large area mask may be formed in a reduced number of steps.
摘要:
A method for forming a gate structure for a semiconductor device includes defining a conductive sacrificial structure on a substrate, forming a reacted metal film on sidewalls of the conductive sacrificial structure, and removing unreacted portions of the conductive sacrificial structure.
摘要:
A method for fabricating a metal-oxide-semiconductor device structure. The method includes introducing a dopant species concurrently into a semiconductor active layer that overlies an insulating layer and a gate electrode overlying the semiconductor active layer by ion implantation. The thickness of the semiconductor active layer, the thickness of the gate electrode, and the kinetic energy of the dopant species are chosen such that the projected range of the dopant species in the semiconductor active layer and insulating layer lies within the insulating layer and a projected range of the dopant species in the gate electrode lies within the gate electrode. As a result, the semiconductor active layer and the gate electrode may be doped simultaneously during a single ion implantation and without the necessity of an additional implant mask.
摘要:
A silicon-on-insulator (SOI) device and structure having locally strained regions in the silicon active layer formed by increasing the thickness of underlying regions of a buried insulating layer separating the silicon active layer from the substrate. The stress transferred from the underlying thickened regions of the insulating layer to the overlying strained regions increases carrier mobility in these confined regions of the active layer. Devices formed in and on the silicon active layer may benefit from the increased carrier mobility in the spaced-apart strained regions.
摘要:
A method for forming carbon nanotube field effect transistors, arrays of carbon nanotube field effect transistors, and device structures and arrays of device structures formed by the methods. The methods include forming a stacked structure including a gate electrode layer and catalyst pads each coupled electrically with a source/drain contact. The gate electrode layer is divided into multiple gate electrodes and at least one semiconducting carbon nanotube is synthesized by a chemical vapor deposition process on each of the catalyst pads. The completed device structure includes a gate electrode with a sidewall covered by a gate dielectric and at least one semiconducting carbon nanotube adjacent to the sidewall of the gate electrode. Source/drain contacts are electrically coupled with opposite ends of the semiconducting carbon nanotube to complete the device structure. Multiple device structures may be configured either as a memory circuit or as a logic circuit.
摘要:
Vertical device structures incorporating at least one nanotube and methods for fabricating such device structures by chemical vapor deposition. Each nanotube is grown by chemical vapor deposition catalyzed by a catalyst pad and encased in a coating of a dielectric material. Vertical field effect transistors may be fashioned by forming a gate electrode about the encased nanotubes such that the encased nanotubes extend vertically through the thickness of the gate electrode. Capacitors may be fashioned in which the encased nanotubes and the corresponding catalyst pad bearing the encased nanotubes forms one capacitor plate.
摘要:
A method for forming a gas dielectric with support structure on a semiconductor device structure provides low capacitance and adequate support for a conductor of the semiconductor device structure. A conductive structure, such as via or interconnect, is formed in a wiring-layer dielectric. A support is then formed that connects to the conductive structure, the support including an area thereunder. The wiring-layer dielectric is then removed from the area to form a gas dielectric.
摘要:
A semiconductor structure and associated method for forming the semiconductor structure. The semiconductor structure comprises a first field effect transistor (FET), a second FET, and a shallow trench isolation (STI) structure. The first FET comprises a channel region formed from a portion of a silicon substrate, a gate dielectric formed over the channel region, and a gate electrode comprising a bottom surface in direct physical contact with the gate dielectric. A top surface of the channel region is located within a first plane and the bottom surface of the gate electrode is located within a second plane. The STI structure comprises a conductive STI fill structure. A top surface of the conductive STI fill structure is above the first plane by a first distance D1 and is above the second plane by a second distance D2 that is less than D1.
摘要:
A dielectric in an integrated circuit is formed by creating oriented cylindrical voids in a conventional dielectric material. Preferably, voids are formed by first forming multiple relatively long, thin carbon nanotubes perpendicular to a surface of an integrated circuit wafer, depositing a conventional dielectric on the surface surrounding the carbon nanotubes, and then removing the carbon nanotubes to produce the voids. A layer of dielectric and voids thus formed can be patterned or otherwise processed using any of various conventional processes. Recesses formed in the dielectric for conductors are lined with a non-conformal dielectric film to seal the voids. The use of a conventional dielectric material having numerous air voids substantially reduces the dielectric constant, leaving a dielectric structure which is both structurally strong and can be constructed compatibly with conventional processes and materials.