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 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 fuse structure and a method for operating the same. The fuse structure operating method includes providing a structure. The structure includes (a) an electrically conductive layer and (b) N electrically conductive regions hanging over without touching the electrically conductive layer. N is a positive integer and N is greater than 1. The N electrically conductive regions are electrically connected together. The structure operating method further includes causing a first electrically conductive region of the N electrically conductive regions to touch the electrically conductive layer without causing the remaining N−1 electrically conductive regions to touch the electrically conductive layer.
摘要:
Semiconductor methods and device structures for suppressing latch-up in bulk CMOS devices. The method comprises forming a trench in the semiconductor material of the substrate with first sidewalls disposed between a pair of doped wells, also defined in the semiconductor material of the substrate. The method further comprises forming an etch mask in the trench to partially mask the base of the trench, followed by removing the semiconductor material of the substrate exposed across the partially masked base to define narrowed second sidewalls that deepen the trench. The deepened trench is filled with a dielectric material to define a trench isolation region for devices built in the doped wells. The dielectric material filling the deepened extension of the trench enhances latch-up suppression.
摘要:
A sidewall image transfer process for forming sub-lithographic structures employs a layer of sacrificial polymer containing silicon that is deposited over a gate conductor layer and covered by a cover layer. The sacrificial polymer layer is patterned with conventional resist and etched to form a sacrificial mandrel. The edges of the mandrel are oxidized or nitrided in a plasma at low temperature, after which the polymer and the cover layer are stripped, leaving sublithographic sidewalls. The sidewalls are used as hardmasks to etch sublithographic gate structures in the gate conductor layer.
摘要:
Methods for fabricating a semiconductor device include forming a first layer on an underlying layer, forming a hardmask on the first layer, and patterning holes through the hardmask and first layer. An overhang is formed extending over sides of the holes. A conformal layer is deposited over the overhang and in the holes until the conformal layer closes off the holes to form a void/seam in each hole. The void/seam in each hole is exposed by etching back a top surface. The void/seam in each hole is extended to the underlying layer.
摘要:
A Y-shaped carbon nanotube atomic force microscope probe tip and methods comprise a shaft portion; a pair of angled arms extending from a same end of the shaft portion, wherein the shaft portion and the pair of angled arms comprise a chemically modified carbon nanotube, and wherein the chemically modified carbon nanotube is modified with any of an amine, carboxyl, fluorine, and metallic component. Preferably, each of the pair of angled arms comprises a length of at least 200 nm and a diameter between 10 and 200 nm. Moreover, the chemically modified carbon nanotube is preferably adapted to allow differentiation between substrate materials to be probed. Additionally, the chemically modified carbon nanotube is preferably adapted to allow fluorine gas to flow through the chemically modified carbon nanotube onto a substrate to be characterized. Furthermore, the chemically modified carbon nanotube is preferably adapted to chemically react with a substrate surface to be characterized.
摘要:
A fin field effect transistor (FinFET) gate comprises a semiconductor wafer; a gate dielectric layer over the semiconductor wafer; a conductive material on the gate dielectric layer; an activated carbon nanotube on a surface of the conductive material; and a plated metal layer on the activated carbon nanotube. Preferably, the carbon nanotube is on a sidewall of the conductive material. The conductive material comprises a first metal layer over the gate dielectric layer, wherein the first metal layer acts as a catalyst for growing the carbon nanotube, wherein the first metal layer is preferably in a range of 1-10 nm in thickness. The semiconductor wafer may comprise a silicon on insulator wafer. The FinFET gate may further comprise a second metal layer disposed between the first metal layer and the gate dielectric layer.