摘要:
The present invention is related to a method of producing polycarbosilane by heating polydimethylsilane at low pressure within the range of 320˜450° C. using zeolite having the Si/Al or Si/B ratio of 1˜200 as catalyst. This invention uses a zeolite with the structure of ZSM-5, ZSM-11, ZSM-12, zeolite X and zeolite Y, which has the Si/Al or Si/B ratio of 1˜200, as catalyst. When polycarbosilane is produced using a specific zeolite as catalyst, Si/Al or Si/B ratio can be adjusted at any proportion, enabling acidity control of catalyst, and therefore the molecular weight of final products can be easily controlled and the product yield can be improved, compared to conventional solid acid catalysts.
摘要:
The present invention relates to a recording medium having data structure including graphic data to be used for a menu page etc. of main video data recorded thereon as well as methods and apparatuses for reproducing and recording the data structure. A recording medium of the present invention comprises: a main data stream including at least video data; and a graphic data stream being used for composition of a menu screen for the recorded main data stream, wherein the graphic data stream includes at least one display set, the display set includes at least one composition segment and at least one data definition segment, and a presentation time stamp written in the composition segment is greater than a presentation time stamp written in the data definition segment.
摘要:
A method for manufacturing a rotary drum for a drum washing machine, in which the strength of a bonding part of the rotary drum is improved so that the bonding part is not deformed even when the rotary drum is rotated at a high speed, and a pressing device used therefor. The method includes bending one circumferential end of the processed material in a U shape to form a first overlapping part and a first bending part, and bending the other circumferential end of the processed material in a U shape to form a second overlapping part and a second bending part; overlapping the first and second overlapping parts with each other to form a connection part; and pressing the connection part so that the original shapes of the first and second bending parts are maintained and the first and second overlapping parts are adhered to each other to form a bonding part. The pressing of the connection part is achieved by a press die including upper and lower dies respectively having a plurality of first and second protrusions disposed in the forward and backward direction of the connection part and having designated spaces between lower ends of the first protrusions and the lower die and/or between upper ends of the second protrusions and the upper die when the upper and lower dies contact each other.
摘要:
A method of automatically backing up and restoring PIMS data stored in a mobile communication terminal is disclosed which allows the users of mobile communication terminals to conveniently restore previously maintained PIMS data in new mobile communication terminals without any loss of the data even when damage, loss or replacement of the mobile communication terminal occurs. To accomplish the above object, the invention encodes update-related information and user authentication information, transmits them to a PMIS data backup/restoration server while the user is not engaging in wireless communication, and stores them when the PIMS data of a user is updated in a mobile communication terminal.
摘要:
A recording medium, method and apparatus for managing data are discussed. According to an embodiment, the present invention provides a method of reproducing main data and additional data. The method includes receiving the additional data associated with the main data, the additional data being divided into a plurality of segment units; and reproducing the additional data in a synchronous manner with the main data using time information if indication information indicates a presence of the time information. The time information indicates a presentation time of the additional data with respect to the main data. The main data and the additional data are reproduced according to management data, the management data including link information for linking the main data and the additional data.
摘要:
The present invention provides according to an embodiment a method of reproducing content, comprising the steps of: (a) checking whether information required for decrypting an encrypted content is present; (b) requesting the information to an external source based on URL (Uniform Resource Locator) information if the information is not present; and (c) reproducing the encrypted content using the information.
摘要:
The invention relates to an LED package frame and an LED package incorporating the same. The LED package frame comprises an LED chip; and a heat conductive member made of a lump of high heat conductivity material. The heat conductive member has a receiving part at a lateral portion, and is mounted with the LED chip. A lead is inserted at one end into the receiving part of the heat conductive member, and electrically connected to the LED chip. An electrically insulating layer is placed in tight contact between the lead and the receiving part of the heat conductive member to separate the lead from the receiving part. With the lead inserted into the heat conductive member, it is possible to reduce size while maintaining high heat conductivity and stability. Also, it is possible to provide an LED package frame and a high power LED package by fixing the lead fixed to the heat conductive member without a jig.
摘要:
Disclosed herein is a quantum dot phosphor for light emitting diodes, which includes quantum dots and a solid substrate on which the quantum dots are supported. Also, a method of preparing the quantum dot phosphor is provided. Since the quantum dot phosphor of the current invention is composed of the quantum dots supported on the solid substrate, the quantum dots do not aggregate when dispensing a paste obtained by mixing the quantum dots with a paste resin for use in packaging of a light emitting diode. Thereby, a light emitting diode able to maintain excellent light emitting efficiency can be manufactured.
摘要:
A method for manufacturing a semiconductor device in accordance with an embodiment of the present invention provides performing a CMP process using high selectivity slurry until the hard mask nitride film is exposed so as to reduce the thickness to be removed in a subsequent CMP process, forming an landing plug contact (LPC) hard mask layer pattern on the exposed hard mask nitride film and the interlayer insulating film to expose the interlayer insulating film of a LPC region, etching the exposed interlayer insulting film using the LPC hard mask layer pattern to form a LPC hole, depositing a polysilicon layer filling up the LPC hole, and performing a CMP process using an acid slurry for metal until the hard mask nitride film is exposed to form a landing plug, so as to reduce the step difference occurring in a peripheral circuit region after a process for forming a landing plug.
摘要:
A method for forming a recess gate of a semiconductor device is disclosed. The method for forming a recess gate of a semiconductor device comprises forming a polysilicon layer pattern covering a contact region on a semiconductor substrate, etching a predetermined thickness of the semiconductor substrate in the active region using the polysilicon layer pattern as an etching mask to form a recess gate region, and forming and patterning the gate polysilicon layer, the gate conductive layer and the gate hard mask layer to form a recess gate.