摘要:
A semiconductor memory device manufacturing method includes forming a floating gate electrode above a semiconductor substrate, forming an interelectrode insulating film above the floating gate electrode, forming a first radical nitride film on a surface of the interelectrode insulating film by first radical nitriding, and forming a control gate electrode on the first radical nitride film.
摘要:
A semiconductor device includes a semiconductor substrate, a first insulating film formed on the semiconductor substrate, a charge storage layer formed on the first insulating film, a second insulating film formed on the charge storage layer, and a control electrode formed on the second insulating film, the second insulating film including a lower silicon nitride film, a lower silicon oxide film formed on the lower silicon nitride film, an intermediate insulating film formed on the lower silicon oxide film and containing a metal element, the intermediate insulating film having a relative dielectric constant of greater than 7, an upper silicon oxide film formed on the intermediate insulating film, and an upper silicon nitride film formed on the upper silicon oxide film.
摘要:
A semiconductor memory device includes a plurality of memory transistors. Each of the memory transistors has: a floating gate electrode; an interelectrode insulating film; and a control gate electrode. The floating gate electrode includes, in a cross section taken along a bit line direction, a first conductive film, first sidewall insulating films opposed to each other across the first conductive film, and a second conductive film provided on the first sidewall insulating films and the first conductive film. The interelectrode insulating film is provided on the second conductive film. The control gate electrode includes a third conductive film provided on the interelectrode insulating film and a fourth conductive film provided on the third conductive film.
摘要:
A damping force control apparatus includes a damping force control device controlling a damping force of a shock absorber provided between a sprung mass and an unsprung mass of each wheel of a vehicle, a detection device detecting at least an acceleration of the sprung mass in an up-down direction and a relative displacement between the sprung mass and the unsprung mass, a damping coefficient calculation device calculating a damping coefficient to be applied to the damping force control by the damping force control device based on detected results of the detection device, a sensed acceleration increment calculation device calculating a sensed acceleration increment corresponding to an increment of sense according to the Weber Fechner law on the basis of the detected results of the detection device, and a modification device modifying the damping coefficient in accordance with a sensed acceleration increment calculated by the sensed acceleration increment calculation device.
摘要:
A semiconductor device includes a semiconductor substrate, and a memory cell array provided on the semiconductor substrate and including a plurality of memory cells arranged on the semiconductor substrate, each of the plurality of the memory cells including a first insulating film provided on the semiconductor substrate, a charge storage layer provided on the first insulating film, a second insulating film provided on the charge storage layer, and a control electrode containing metal or metal silicide provided on the charge storage layer via the second insulating film, wherein a corner of a lower part of the control electrode includes semiconductor and fails to contain the metal or the metal silicide in a channel width direction view of the memory cell.
摘要:
A nonvolatile semiconductor memory includes first and second memory cells having a floating gate and a control gate. The floating gate of the first and second memory cells is comprised a first part, and a second part arranged on the first part, and a width of the second part in an extending direction of the control gate is narrower than that of the first part. A first space between the first parts of the first and second memory cells is filled with one kind of an insulator. The control gate is arranged at a second space between the second parts of the first and second memory cells.
摘要:
A cleaning method for use in an apparatus for manufacturing a semiconductor device includes: measuring components and concentration of each component of gas in a process chamber of an apparatus for manufacturing a semiconductor device, or selected from a group including gas in the chamber, a process gas in a gas inlet pipe, and gas in a gas outlet pipe; performing a prescribed process on a substrate in the chamber, while adjusting the components and the concentration of each component of the process gas, and of an atmosphere in the chamber, on the basis of the values measured, and taking the substrate from the chamber after the process is subjected; and generating and applying a cleaning gas on the basis of the values measured, the cleaning gas having such components and such concentration as to remove residues.
摘要:
In a process of annealing an insulating film such as a silicon oxide film (SiO2) or a silicon oxynitride film (SiON) provided in a processing chamber 6 within an atmosphere of an inert gas 2 guided from a first mass flow controller 3 via a gas inlet 7, an amount of SiO sublimated from the surface of the insulating film in the processing chamber 6 is measured by a mass spectrometer 10, and an amount of oxygen gas 4 guided to the processing chamber 6 from a second mass flow controller 5 is controlled by a controller 1 so that the SiO concentration does not exceed a predetermined level, thereby effectively controlling the SiO sublimation. As a result, the film deterioration caused by the SiO sublimation is prevented and an insulating film having a high reliability and good characteristics can be formed in a controllable manner.
摘要:
According to the present invention, there is provided a selectivity monitoring method in a selective film growth method of selectively growing a film in a predetermined region on a semiconductor substrate, comprising: selectively growing the film on a surface of the semiconductor substrate while measuring temperature of the surface of the semiconductor substrate by at least one pyrometer placed in a non-contact state above the surface of the semiconductor substrate; and determining that selectivity of the growth of the film has decreased, when the temperature changes from a predetermined value or changes from a predetermined angle in a graph showing change of the temperature during film formation.
摘要:
An Si.sub.3 N.sub.4 layer is formed on a surface of a wafer, which is an object to be processed, at a high temperature of, for example, 780.degree. C., using a vertical thermal processing apparatus having a reaction tube of a double-wall structure comprising an inner tube and an outer tube in which a predetermined reduced-pressure status is maintained within the reaction tube while a reaction gas comprising, for example, SiH.sub.2 Cl.sub.2 and NH.sub.3 is made to flow from an inner side to an outer side of the inner tube by the action of a first gas supply pipe and first exhaust pipe provided in the thermal processing apparatus. Next, the temperature in the interior of the reaction tube is raised to, for example, 1000.degree. C., a reaction gas comprising, for example, H.sub.2 O vapor and HCl is made to flow from the outer side to the inner side of the inner tube by the action of a second gas supply pipe and second exhaust pipe, and an SiO.sub.2 layer is formed by the oxidation of the surface of the Si.sub.3 N.sub.4 layer formed on the surface of the wafer, under normal-pressure conditions. The use of a combined chamber enables the implementation of film formation and either oxidation or diffusion processing without having to remove the object to be processed from the reaction tube, and thus prevents the intrusion of a natural oxide layer or the incorporation of particles into a thin film structure of, for example, SiO.sub.2 and Si.sub.3 N.sub.4 layers used as a multi-layer insulating film for devices such as DRAMs.