摘要:
A semiconductor device having a capacitor and a method of manufacturing thereof are provided, securing a certain capacitance while allowing the size to be reduced. The semiconductor device includes a capacitor lower electrode having an upper surface and including a metal film, a dielectric film deposited on the upper surface of the capacitor lower electrode and having its thickness smaller than that of the capacitor lower electrode, and a capacitor upper electrode deposited on the dielectric film, having its width smaller than that of the capacitor lower electrode and including a metal film.
摘要:
A contact hole having an opening diameter smaller than the minimum dimension that can be formed by photolithographic technique is formed. Using an interlayer insulating film 8 formed on a semiconductor substrate as an etching mask, etching is carried out halfway to form an opening 8a. The etching mask is removed, and a TEOS film 10 is formed on the interlayer oxide film 8. The whole surface is then etched anisotropically to form a contact hole 11.
摘要:
A semiconductor device includes a second insulator layer (12) a first conductor layer (13) and a second insulator layer (14) stacked in this order on a semiconductor substrate (11), and a trench (15) formed to penetrate the stacked triple layer and extend into the semiconductor substrate. A capacitor is formed at a portion of the trench located in the semiconductor substrate. A transistor is formed directly on this capacitor. The capacitor has one electrode formed of the semiconductor substrate and the other electrode formed of a second conductor layer (18) formed in the trench to open a dielectric film (17). The transistor includes a gate electrode formed of the first conductor layer and source/drain regions (20, 21) of a second conductivity type distributed in the vicinity of the first and second insulator layers in an active layer (19) filling the trench. The drain and source regions of the transistor are formed by thermally diffusing impurities included in the first and second insulator layers into the active layer. Since a region to be added only for isolation is unnecessary in this semiconductor device and a manufacture method thereof, a memory cell area can be reduced, resulting in higher integration of the device.
摘要:
A vacuum-treatment apparatus employs a magnetically driven clamp which uses repulsive and attractive forces between magnets. The clamp mechanism is simplified, maintenance of the apparatus can be easily performed, and the surfaces which mechanically contact one another are decreased as much as possible so that a vacuum-treatment apparatus which generates less dust is obtained.
摘要:
A wafer treating device utilizing a plasma generated by a gas discharge caused by electron cyclotron resonance (ECR) includes a wafer treating chamber and a plasma generating chamber, a microwave supply for supplying microwave energy to the plasma generating chamber, and an electromagnetic coil which surrounds the plasma generating chamber to produce a minimum B-field therein. A plasma generated in the plasma generating chamber by electron cyclotron resonance is confined stably therein by the minimum B-field produced by the coil. Thus, the density and stability of the plasma in the plasma generating chamber are enhanced. The plasma in the plasma generating chamber is conveyed to a wafer in the wafer treating chamber along the diverging lines of a magnetic force. Examples of the minimum B-field producing coil include Ioffe bars, a baseball coil and an Yin-yang coil.
摘要:
A method of cleaning semiconductor devices which removes or transmutes the contaminants sticking on sidewalls of a pattern or a trench is formed is disclosed. A substrate to be treated on which a pattern or a trench is formed is located in a processing container. A reactive gas which reacts with the contaminants sticking on the sidewall of the pattern or the trench to produce reactive ions which remove or transmute the contaminants is introduced into the processing container. Plasma of the reactive gas is produced by electronic cyclotron resonance in order to produce reactive ions from the reactive gas introduced into the processing container. According to the method, the temperature of the reactive ions in the plasma becomes high, with the result that the motion of the reactive ions in the plasma becomes more active. Accordingly, a velocity vector in a horizontal direction of the reactive ions becomes larger, which enables efficient removal or change in quality of the contaminants sticking on the sidewalls of the pattern or the trench.
摘要:
A principal feature of the present invention is to clean a surface of a semiconductor substrate without providing a damaged layer to the surface thereof. A native oxide film formed on the surface of a silicon substrate is etched by plasma employing a gas containing fluorine. The surface of the semiconductor substrate is again subjected to plasma etching by employing a gas containing fluorine in order to remove a surface damaged layer and a fluorocarbon layer formed in the above step of plasma etching. The semiconductor substrate surface is irradiated with ultraviolet rays under a low pressure in order to dissociate and remove fluorine atoms chemically adsorbed to the semiconductor substrate surface upon the latter plasma etching.
摘要:
A semiconductor device includes a second insulator layer (12), a first conductor layer (13) and a second insulator layer (14) stacked in this order on a semiconductor substrate (11), and a trench (15) formed to penetrate the stacked triple layer and extend into the semiconductor substrate. A capacitor is formed at a portion of the trench located in the semiconductor substrate. A transistor is formed directly on this capacitor. The capacitor has one electrode formed of the semiconductor substrate and the other electrode formed of a second conductor layer (18) formed in the trench to open a dielectric film (17). The transistor includes a gate electrode formed of the first conductor layer and source/drain regions (20, 21) of a second conductivity type distributed in the vicinity of the first and second insulator layers in an active layer (19) filling the trench. The drain and source regions of the transistor are formed by thermally diffusing impurities included in the first and second insulator layers into the active layer. Since a region to be added only for isolation is unnecessary in this semiconductor device and a manufacture method thereof, a memory cell area can be reduced, resulting in higher integration of the device.
摘要:
A plasma etching apparatus comprises a chamber, a holding table for holding samples, such as a semiconductor substrate to be etched, in the chamber, a plasma-generating device for generating a plasma within the chamber, and a magnetic-field-forming device which forms a magnetic field perpendicular to the surface of the sample placed on the holding table and parallel the inner wall of the chamber.
摘要:
A circular polishing pad has grooves formed on the surface in a spiral pattern with its center point offset from the center of the pad. The spiral pattern is an Archimedean spiral pattern or a parabolic spiral pattern. A target object is polished by using such a polishing pad without oscillating the platen to which the polishing pad is pasted or the polishing head that holds the target object.