摘要:
The present invention relates to a process for preparing 4-chloro-3-hydroxybutanoic acid ester, an intermediate for preparing atorvastatin, in high purity and yield, by comprising the steps of 1) reacting epichlorohydrin of formula (2) with cyanide of formula (3) under the condition of pH ranging from 7 to 8, to form the 4-chloro-3-hydroxybutyronitrile of formula (4) and 2a) dissolving the 4-chloro-3-hydroxybutyronitrile of formula (4) in an alcoholic solvent and reacting it with hydrogen chloride, or 2b) reacting the 4-chloro-3-hydroxybutyronitrile of formula (4) in an alcoholic solvent saturated with hydrogen chloride, to form the 4-chloro-3-hydroxybutyronitrile acid ester of formula (I).
摘要:
Disclosed is a semiconductor device having an align key and a method of fabricating the same. The semiconductor device includes a semiconductor substrate having a cell area and an align key area. An isolation layer that defines a cell active area is disposed in the cell area of the semiconductor substrate. A cell charge storage layer pattern is disposed across the cell active area. An align charge storage layer pattern is disposed in the align key area of the semiconductor substrate. An align trench self-aligned with the align charge storage layer pattern is formed in the align key area of the semiconductor substrate.
摘要:
A wall-mounted microwave oven in which a bottom plate adapted to be mounted to a lower end of an oven body is easily detachable. The wall-mounted microwave oven includes a coupling unit for mounting the bottom plate to the lower end of the oven body. The coupling unit includes a plurality of engagement slots formed through the lower end of the oven body at positions spaced apart from one another, respectively, and a plurality of engagement hooks provided on the bottom plate at positions corresponding to the positions of the engagement slots, and adapted to be engaged with the engagement slots in a state of being inserted into the engagement slots, respectively. Since the mounting of the bottom plate to the oven body is achieved by engagement between the engagement hooks and the engagement slots, it is possible to mount and separate the bottom plate easily.
摘要:
A liquid crystal display device includes: a liquid crystal display panel including an upper substrate, a lower substrate on which a plurality of gate lines and data lines cross each other, and a liquid crystal layer formed between the upper substrate and the lower substrate; a gate driving circuit for driving the plurality of gate lines; and a MUX circuit disposed at a surplus space portion of the lower substrate, having a plurality of inverters, an input terminal thereof connected to the gate driving circuit and an output terminal thereof connected to the plurality of gate lines corresponding to the gate driving circuit, and sequentially transmitting a gate signal into a plurality of input signals.
摘要:
Provided are a nonvolatile memory device that has enhanced endurance and can accurately read stored data, and a method of manufacturing the same. The nonvolatile memory device includes a trench formed in a semiconductor substrate, a gate electrode formed in the trench, a gate electrode insulating layer interposed between the gate electrode and bottom and lower sidewalls of the trench, a trap structure interposed between upper sidewalls of the trench and the gate electrode and comprising a tunneling layer, a trapping layer, and a blocking layer, and source and drain regions formed on both sides of the semiconductor substrate with respect to the trench, in which the gate electrode insulating layer is not formed and partially overlapped by the trapping layer.
摘要:
Apparatus and method are provided for processing video on demand (VOD) video data in a mobile terminal capable of receiving a VOD service. An input window for VOD video data to be adjusted is displayed in preset frame rate (FR) adjust mode for adjusting an FR of the VOD video data to be received. When the FR of the VOD video data to be adjusted is input into the input window, the input FR of the VOD video data is transmitted to a server. When the VOD video data service is provided in a streaming manner, a user can adjust the FR of VOD video data through the method. Therefore, the user can receive video data such as advertisement broadcasting in which the user takes no interest at a low FR, thereby reducing unnecessary packet data fees.
摘要:
A microwave oven including a component compartment and a cooking compartment each including a discharging part to discharge air in the cooking compartment through the cooking compartment through portion; a supplying fan introducing the air to the component compartment through portion to cool the component compartment; a discharging fan introducing the air in the cooking compartment to the discharging part through the cooking compartment through portion; a fan motor between the supplying fan and the discharging fan to operate the supplying fan and the discharging fan; and an interfering part to interfere with the fan assembly when at least one of the supplying fan and the discharging fan is not in a predetermined position corresponding to the component compartment through portion and the discharging part.
摘要:
Disclosed is an apparatus and method for multi-tasking in a mobile terminal having a multimedia processor for VOD services that identifies a port of each data received during the use of a video-on-demand (VOD) service and processes the data to enable a user to implement any other network application program simultaneously with the use of the VOD service. The method for multi-tasking in a mobile terminal comprises setting a port number for the VOD services of the multimedia processor and accessing a VOD server when a demand for VOD services is received, processing VOD data received through the set port number to deploy VOD services, determining whether a port number of data received during the VOD services is identical to the set port number and, if in the affirmative, recognizing the received data as the VOD data to deploy the VOD services, recognizing the received data as general data and sending the data to an MSM from the multimedia processor when the port number of the received data is not identical to the set port number,; and processing the general data sent to the MSM.
摘要:
A driving circuit for a flat panel display device includes first and second generation units generating m-phase circulation enable control clocks and n-phase circulation form generation clocks; and a plurality of shift register stages generating output signals by using the m-phase circulation enable control clocks and the n-phase circulation form generation clocks. Each shift register stage includes an input terminal receiving the m-phase circulation enable control clocks; first and second nodes outputting first and second signals, respectively, using the m-phase circulation enable control clocks; a first transistor connected to the first node and receiving the n-phase circulation form generation clocks; a second transistor connected to the second node and the first transistor; and an output terminal between the first and second transistors and outputting one of the output signals.
摘要:
A system and method for cleaning and drying semiconductor wafers improves device yield by providing more advanced control of the ratio of drying fluid to cleaning fluid, for example the ratio of N2 vapor to IPA vapor. In addition, a quick drain process is employed to improve process throughput, and to further improve particle and watermark removal during the cleaning and drying steps.