摘要:
Uniformity of temperature is established within a wafer, and a higher throughput is achieved while the wafer heating time is dramatically reduced by combining lamp heating with hot-wall heating. Lamps 10 are provided outside the furnace body 3 of a hot-wall CVD apparatus. The hot-wall reactor furnace body 3 is preheated to a prescribed temperature. Wafers W are loaded into the furnace body 3, and these wafers W are rapidly heated immediately thereafter to the desired temperature by light emitted by the lamps 10. The lamps 10 are switched off following heating, and the wafer temperature is allowed to reach a uniform state as a result of heat diffusion in the wafers in the hot-wall reactor furnace body 3. It is also possible to adopt an arrangement in which preheating commensurate with the cooling occurring during the transport period is performed before the wafers W are loaded into the furnace body 3, the wafers W are then loaded Into the reactor furnace body 3. and the water temperature is allowed to achieve a uniform state.
摘要:
A hemispherical grain (HSG) formation process for enlarging the surface area of a capacitor electrode, wherein stable, defect-free HSG, having outstanding selectivity, is formed. An amorphous silicon layer, which constitutes a capacitor electrode, is formed on an Si wafer, on which is formed a silicon-based dielectric layer, which constitutes an interlevel dielectric layer. An HSG layer, in which there exists practically no defects, is formed on the amorphous silicon layer at a crystal nuclei formation temperature of under 620null C. Further, in accordance with properly controlling the crystal nuclei formation temperature, and the flow rate of monosilane (SiH4), which is supplied for crystal nuclei formation, it is possible to furnish selectivity such that HSG nuclei are formed solely on the amorphous silicon layer, without being formed on a silicon-based dielectric layer.
摘要:
A correlating filter includes a delay circuit which outputs a plurality of tap output signals TP1 to TPn having different delays. The correlating filter further includes a weighted adder circuit which weights the tap output signals, respectively, and adds the weighted tap output signals so as to derive a correlated output signal. A timing control circuit produces a control signal based on the correlated output signal from the weighted adder circuit. The control signal is high in level when the correlated output signal has a correlation peak. A power feed to the weighted adder circuit is achieved via a switching element. The switching element is only turned on when the control signal is high in level so as to enable the power feed to the weighted adder circuit. Thus, reduction in power consumption is achieved and the filter can be used in a portable radio device.
摘要:
A substrate processing apparatus and method restrains outside air and gas-phase backward flow from entering the inside of a reaction chamber during a time period that the inside of the reaction chamber is opened to the outside through a substrate carrying-in/carrying-out opening. The substrate processing apparatus can comprise, for example, a vertical CVD apparatus having a gas supply system and a bypass line. The gas supply system supplies inert gas to a space between an outer tube and an inner tube of a reaction furnace during a boat loading period and a boat unloading period. The bypass line exhausts the atmosphere from the reaction chamber by a slow exhaust operation during the boat loading period and the boat unloading period.
摘要:
A substrate processing apparatus comprises a heating member, a reaction tube body provided in the heating member and having a first gas introducing section and a gas exhausting section, a substrate holder disposed in the reaction tube body for horizontally holding a substrate within the reaction tube body between the first gas introducing section and the gas exhausting section, a gas heating tube provided in the heating member along the reaction tube body, and having a second gas introducing section and a gas discharging section which is in communication with the first gas introducing section of the reaction tube body, the gas heating tube being arranged such that a gas flowing in the gas heating tube first flows form the first gas introducing section side toward the gas exhausting section side, and then returns to flow from the gas exhausting section side toward the first gas introducing section side.
摘要:
A receiver receives transmitted data, and a decoder detects the number of error bits in the received data based on check data contained in the received data. If the number of error bits is 2 or less, then when an error correction is instructed by a selector switch, the decoder effects an error correction on message data, and the corrected message data are stored in a RAM. If the number of error bits is more than 2, the decoder does not effect an error correction on the message data, and the message data with error bits are stored in the RAM. When the message data stored in the RAM are displayed on a display screen, the user sees either the corrected message or the uncorrected message.
摘要:
A semiconductor fabricating apparatus comprises a reaction tube defining a space for heat treating a silicon wafer, heater means disposed to extend around the reaction tube, a load-lock chamber connected to the reaction tube by means of a gate valve, a supply pipe communicating with the load-lock chamber for supplying an inert gas and a gas including oxygen thereto, an oxygen densitometer, an inert gas flow rate adjuster and an oxygen flow rate regulator, and based on the results detected by the oxygen densitometer, controls the flow rate of the inert gas and the gas including oxygen, by means of the flow rate adjuster, the flow rate regulator, to maintain the oxygen concentration within the load-lock chamber at a desire value.
摘要:
An image enhancement method and an image enhancement apparatus is provided, wherein a multiple-gray-level converter of a grayscale converter converts an original two-grayscale image, an image enhancement device enhances the resultant image so that gray values for the outline of the image are smoothly changed, and a two-gray-level converter converts the enhanced image to a two-grayscale image by referring to a specific value that is set in advance. The image enhancement method and the image enhancement apparatus of the present invention resolve the conventional problem of jaggies that appear in the outline of an enhanced image and make the image appear unattractive, and they thus produce a high quality enhanced two-grayscale image that has a smoother outline.
摘要:
An information broadcasting method for a communication system including a plurality of stations. The communication system enables any two of the stations to communicate with one another. The communication system includes a conference trunk having at least four channels. One of the channels is an information broadcasting channel for use only in an information broadcasting operation wherein any one of the stations broadcasts information to all of the stations simultaneously via the information broadcasting channel. All other ones of the channels are conference communication channels for use in conference communication wherein any three or more of the stations communicate with one another simultaneously via any three or more of the conference communication channels. During an information broadcasting operation, any one of the stations which is receiving broadcast information from another one of the stations can transmit information to all of the stations in the system, including the station which is broadcasting information, via a vacant conference communication channel in the conference trunk, thereby engaging in bidirectional communication with the station which is broadcasting information during the information broadcasting operation.
摘要:
There is disclosed an acceptable error detector for error correcting block codes, in which of received syndrome vectors S for the received word vectors Y available from the syndrome generator, the m.sub.e -bit received subsyndromes S(m.sub.e) formed by the same components as those of the m.sub.e -bit representative subsyndromes uniquely corresponding to the vectors of all the acceptable error pattern with error bits equal to or less than the acceptable number e is applied as addresses into the redundant subsyndrome table memory. Since the stored data specified by the input address are (m-m.sub.e)-bit redundant subsyndromes which are supposed to appear in the remaining portion of S(= ) when the number of error bits is equal to or less than e, the remaining (m-m.sub.e)-bit received subsyndromes S(m-m.sub.e) derived from the received word vector Y in the syndrome generator and the (m-m.sub.e)-bit redundant subsyndrome obtained from the redundant subsyndrome table memory are compared with each other by a coincidence detector to detect coincidence or noncoincidence therebetween. By this configuration, it is possible to detect whether the number of error bits in received word is acceptable.