Abstract:
An MOS transistor has a gate electrode (33) with a T-shaped cross-section. The gate length is defined in a first structuring step by a spacer method. The upper extension of the gate electrode is defined in a second structuring step. The MOS transistor can be produced with a channel length of under 100 nm.
Abstract:
A method for fabrication of features of an integrated circuit and device thereof include patterning a first structure on a surface of a semiconductor device and forming spacers about a periphery of the first structure. An angled ion implantation is applied to the device such that the spacers have protected portions and unprotected portions from the angled ion implantation wherein the unprotected portions have an etch rate greater than an etch rate of the protected portions. The unprotected portions and the first structure are selectively removed with respect to the protected portions. A layer below the protected portions of the spacer is patterned to form integrated circuit features.
Abstract:
A method of improving pattern loading in a deposition of a silicon oxide film is described. The method may include providing a deposition substrate to a deposition chamber, and adjusting a temperature of the deposition substrate to about 250°C to about 325°C. An ozone containing gas may be introduced to the deposition chamber at a first flow rate of about 1.5 slm to about 3 slm, where the ozone concentration in the gas is about 6% to about 12%, by wt. TEOS may also be introduced to the deposition chamber at a second flow rate of about 2500 mgm to about 4500 mgm. The deposition rate of the silicon oxide film is controlled by a reaction rate of a reaction of the ozone and TEOS at a deposition surface of the substrate.
Abstract:
A method of forming and removing a sacrificial oxide layer is described. The method includes forming a step on a substrate, where the step has a top and sidewalls. The method may also include forming the sacrificial oxide layer around the step by chemical vapor deposition of molecular oxygen and TEOS, where the oxide layer is formed on the top and sidewalls of the step. The method may also include removing a top portion of the oxide layer and the step; removing a portion of the substrate exposed by the removal of the step to form a etched substrate; and removing the entire sacrificial oxide layer from the etched substrate.
Abstract:
A method for fabricating a quantum device, the method comprising: providing a substrate and an insulator formed on the substrate; from combinations of selective-area-grown semiconductor material along with regions of a superconducting material, forming a network of nanowires oriented in a plane of the substrate which can be used to produce a Majorana-based topological qubit; and fabricating a side gate for controlling a topological segment of the qubit; wherein the selective-area-grown semiconductor material is grown on the substrate, by etching trenches in the insulator formed on the substrate to define the nanowires and depositing the semiconductor material in the trenches defining the nanowires; and wherein the fabricating of the side gate comprises etching the dielectric to create a trench for the side gate and depositing the side gate in the trench for the side gate.
Abstract:
Un substrat de type SOI est recouvert par un masque de gravure définissant trois motifs semi-conducteurs distincts. Un espaceur latéral (11) est formé autour des trois motifs et il réalise la connexion entre deux motifs adjacents. La couche isolante enterrée est éliminée de manière à définir une cavité qui suspend une partie d'un premier motif. Le premier masque de gravure est éliminé. Un diélectrique de grille est formé sur deux faces principales opposées du premier motif. Une résine est déposée dans la cavité et sur le premier motif puis insolée pour former deux motifs définissant les grilles inférieure et supérieure. Un matériau électriquement conducteur (14) est déposé dans la cavité et sur le premier motif de manière à former la grille inférieure et la grille supérieure de part et d'autre du premier motif en matériau semi-conducteur.
Abstract:
Some embodiments include methods of patterning materials. A mass may be formed over a material, and a first mask may be formed over the mass. First spacers may be formed along features of the first mask, and then the first mask may be removed to leave a second mask corresponding to the first spacers. A pattern of the second mask may be partially transferred into the mass to form an upper portion of the mass into a third mask. The first spacers may be removed from over the third mask, and then second spacers be formed along features of the third mask. The second spacers are a fourth mask. A pattern of the fourth mask may be transferred into a bottom portion of the mass, and then the bottom portion may be used as a mask during processing of the underlying material.
Abstract:
By using conventional spacer and etch techniques, microstructure elements, such as lines and contact openings of integrated circuits, may be formed with dimensions that are mainly determined by the layer thickness of the spacer layer. In a sacrificial layer 309, an opening is formed by means of standard lithography and etch techniques and, subsequently, a spacer layer 312 is conformally deposited, wherein a thickness of the spacer layer 312 at the sidewalls of the opening substantially determines the effective width of the microstructure element to be formed. By using standard 193 rim lithography and etch processes, gate electrodes of 50 nm and beyond can be obtained without significant changes in standard process recipes.
Abstract:
A first portion of a multiple cycle spacer is formed on a sidewall of a patterned feature over a substrate. A spacer layer is deposited on the first portion using a first plasma process. The spacer layer is etched to form a second portion of the multiple cycle spacer on the first portion using a second plasma process. A cycle comprising depositing and etching of the spacer layer is continuously repeated until the multiple cycle spacer is formed.