Abstract: A semiconductor manufacturing apparatus including a process chamber and a boat having a support member supporting substrates arranged in a first direction. An inner tube encloses the boat and includes a slit along a side wall. A nozzle supplies a process gas and includes a gas injection port at a position corresponding to the slit. The gas injection port includes a first inlet and first outlet. The slit includes a second inlet and second outlet. A distance to an end of the first inlet from a center line that connects a center of the first inlet and a center of the second outlet is different from the distance from the center line to an end of the first outlet and/or a distance from the center line to an end of the second inlet is different from a distance from the center line to an end of the second outlet.

Abstract: Disclosed herein is a fiber optics connection box in which a feeding cable introduced into the fiber optics connection box is processed by an optical processing module and is withdrawn as out cables, passing cables pass through a receiving space defined in the fiber optics connection box, thereby improving watertightness, work efficiency, and price competitiveness in a state in which the cables are mounted or while the cables are mounted.

Abstract: Disclosed herein is a fiber distribution housing which maximizes worker's operation efficiency, simplifies arrangement of optical cables within the fiber distribution housing, and minimizes tension or stress applied to the optical cables.

Abstract: Disclosed herein is a fiber optics connection box in which a feeding cable introduced into the fiber optics connection box is processed by an optical processing module and is withdrawn as out cables, passing cables pass through a receiving space defined in the fiber optics connection box, thereby improving watertightness, work efficiency, and price competitiveness in a state in which the cables are mounted or while the cables are mounted.

Abstract: Disclosed herein is a fiber distribution housing which maximizes worker's operation efficiency, simplifies arrangement of optical cables within the fiber distribution housing, and minimizes tension or stress applied to the optical cables.

Abstract: Disclosed herein is an optical access network system in which the transmission quality of an upstream signal is remarkably improved in an optical access network in which a Reflective Semiconductor Optical Amplifier (RSOA) is used as the light source for each subscriber. The most important characteristics of the present invention are that a Manchester modulation format is used as a modulation format for a downstream signal in an optical access network system in which an RSOA is used as the light source for each subscriber, so that the problem of deterioration of the transmission quality of a remodulated upstream signal, occurring when an RSOA is used as the light source for each subscriber, is solved, and thus the transmission performance of an upstream signal and the power budget performance of the entire system are improved.