摘要:
A gas injector includes a body, a motor and a chopper. The body is mounted on a reaction chamber in a vertically extending cylinder shape and has a plurality of gas injection tubes and a central hollow portion. The plurality of gas injection tubes pass through a bottom face of the body and the central hollow portion passes through each center of the bottom and top faces of the body. The motor has a rotary shaft inserted into the central hollow portion. The chopper is formed in a circular-plate shape and has a notch on a predetermined portion. The chopper is coupled with an end of the rotary shaft and rotated by a rotation of the rotary shaft in a state that the bottom face of the body is closely attached to the chopper through a magnetic sealing.
摘要:
A method for removing a native oxide and contaminants from a wafer surface at a relatively low temperature ranged from 100.degree. C. to 800.degree. C. uses H.sub.2 gas or hydrogen containing gas comprising ion sources chosen from impurity ions such as boron, phosphorus, arsenic, antimony, aluminum, and germanium activated by a plasma to be applied to the wafer surface in a vacuum furnace. A method for forming a thin oxide on a silicon wafer or substrate at a relatively low temperature ranged from 250.degree. C. to 800.degree. C. applies O.sub.2 or NO.sub.2 by using a plasma to the silicon wafer in a vacuum furnace.
摘要:
An apparatus for fabricating a semiconductor device comprising: a reactor for providing a reaction region separated from outside; a pedestal arranged within said reactor to support a semiconductor substrate; a substrate transport port for loading said semiconductor substrate into said reactor; and upper and lower plasma electrodes for generating plasma within said reaction region, said upper and lower plasma electrodes being disposed in the upper and lower portions of said reaction region in respect to said pedestal, respectively. The apparatus further comprise a slot valve plasma electrode within the substrate transport port, and the slot valve plasma electrode is connected to the lower plasma electrode via an RF wire. Also, the upper and lower plasma electrodes are connected to the same RF power supply. According to the present invention, the region lower than the pedestal and the substrate transport port are dry cleaned by plasma generated by the lower plasma electrode and the slot valve plasma electrode, so an additional wet cleaning is not required. Therefore, generation of undesired particles of the prior art can be prevented.
摘要:
The present invention relates to a semiconductor substrate, a semiconductor device with high carrier mobility and a method of manufacturing the same. According to the present invention, there are provided a semiconductor substrate comprising a silicon substrate, a single crystal germanium layer formed on the silicon substrate, and a silicon layer formed on the single crystal germanium layer; a semiconductor device comprising a gate electrode formed on the semiconductor substrate, and junctions formed in the substrate at both sides of the gate electrode; and a method of manufacturing the semiconductor device. Therefore, carrier mobility of channels can be enhanced since the channels of semiconductor devices are placed within the germanium layer. Further, since the silicon layer is formed on the germanium layer, the reliable gate insulation film can be formed and a leakage current produced in a junction layer can also be reduced. Moreover, the same effect can be obtained without using an expensive germanium wafer. Accordingly, since conventional processes and equipment can be used as they are, highly efficient semiconductor devices can be fabricated without increase of a unit cost of production.
摘要:
Disclosed is a semiconductor device manufacturing apparatus provided with a rotational gas injector for supplying source gases at an upper portion of a reaction chamber. According to the invention, source gases are injected from the upside of the wafers through the rotational type gas injector, and non-reacted gases are exhausted into the downside space of the wafers, so that lowering in the thickness uniformity of a thin film due to the horizontal flow of source gases provided in the conventional art decrease remarkably. Accordingly, although multiple wafers are loaded in a single reaction chamber, a thin film having very high thickness uniformity can be deposited with respect to all the wafers, thereby capable of enhancing the productivity.
摘要:
A thin film type solar cell and a method for manufacturing the same is disclosed, wherein the method comprises sequentially depositing a front electrode layer and a semiconductor layer on a substrate; forming a first separating channel by removing predetermined portions of the front electrode layer and the semiconductor layer; forming a contact portion and a second separating channel by removing predetermined portions of the semiconductor layer; forming a first insulating layer in the first separating channel; and forming a plurality of rear electrodes at fixed intervals by each second separating channel interposed in-between, wherein each rear electrode is electrically connected with the front electrode layer through the contact portion. The present invention needs only one cleaning process after carrying out the laser-scribing process, whereby the yield can be improved owing to the simplified manufacturing process. According to the present invention, there is no need to alternately load the substrate to the vacuum-deposition apparatus and the laser-scribing apparatus, whereby the apparatus structure is simple and the manufacturing time is decreased, thereby resulting in the improved yield.
摘要:
A thin film type solar cell and a method for manufacturing the same is disclosed, wherein the method comprises sequentially depositing a front electrode layer and a semiconductor layer on a substrate; forming a first separating channel by removing predetermined portions of the front electrode layer and the semiconductor layer; forming a contact portion and a second separating channel by removing predetermined portions of the semiconductor layer; forming a first insulating layer in the first separating channel; and forming a plurality of rear electrodes at fixed intervals by each second separating channel interposed in-between, wherein each rear electrode is electrically connected with the front electrode layer through the contact portion. The present invention needs only one cleaning process after carrying out the laser-scribing process, whereby the yield can be improved owing to the simplified manufacturing process. According to the present invention, there is no need to alternately load the substrate to the vacuum-deposition apparatus and the laser-scribing apparatus, whereby the apparatus structure is simple and the manufacturing time is decreased, thereby resulting in the improved yield.
摘要:
A high-permittivity dielectric capacitor and a fabrication method thereof are provided. The capacitor uses a tantalum oxynitride film as a high-permittivity dielectric film. The tantalum oxynitride film is deposited by chemical vapor deposition using tantalum ethoxide gas as a source of tantalum and oxygen and ammonia gas as a source of nitrogen. The tantalum oxynitride film has a high permittivity, a high thermal stability and a low interface heterogeneity between upper and lower electrodes. Thus, the current leakage due to oxygen vacancy in the film can be reduced.
摘要:
A cluster tool for fabricating a semiconductor device includes: a transfer chamber having a wafer handling robot; a plurality of process chambers installed adjacent to each wall face of the transfer chamber; a loadlock chamber installed adjacent to different wall faces of the transfer chamber, in which a cassette is positioned to bring in and take out a wafer; and a cooling chamber installed at one side of a different wall face of the transfer chamber with an open-and-shut unit therebetween, the cooling chamber being provided with a wafer multiple-mounting unit having a plurality of wafer mounting plates for simultaneously mounting wafers which finishes undergoing processes in the process chamber and cooling them. Since it includes a fresh structure of wafer multiple-mounting unit, even though the plurality of process chambers of the cluster tool simultaneously proceed the fabrication process of a semiconductor device, the process bottle neck phenomenon as in the conventional art would not occur even though the wafer is delayed to be cooled. Consequently, the process time is shortened and thus the production cost of the semiconductor device can be reduced.
摘要:
An apparatus for fabricating a semiconductor device includes: a reactive chamber having an inlet and an outlet for a gas and being electrically grounded; a susceptor installed in the reactive chamber for mounting a wafer thereon and being electrically insulated with the reactive chamber; and an RF generator for applying an RF electric power to the susceptor. A method for cleaning the apparatus for fabricating a semiconductor device includes the steps of: injecting a plasma forming gas through the gas inlet; and moving the susceptor in the vertical direction of the face of the wafer while applying the RF electric power to the susceptor, to control the position and the density of the plasma. Since the plasma is formed even at the shadow area, such as the lower space of the susceptor within the reactive chamber where plasma could be hardly formed, there is no need to clean separately the lower space of the reactive chamber. Thus, the cleaning process is simplified. In addition, since the density of the plasma can be easily controlled without increase or decrease of the RF electric power by transferring the susceptor 140 vertically, the inside of the reactive chamber 110 can be uniformly and effectively cleaned with the plasma.