摘要:
This invention relates to a method of fabricating a paste bump for a printed circuit board, which can decrease the number of printings to thus reduce the fabrication cost and process time in the formation of the paste bump on the printed circuit board.
摘要:
A method of fabricating a paste bump for a printed circuit board, provides preparing a base plate; printing a conductive paste on the base plate and drying the conductive paste on the base plate, thus forming a first paste bump; flattening an upper surface of the first paste bump through coining; and printing a conductive paste on the first paste bump and drying the conductive paste on the first bump, thus forming a second paste bump, wherein the printing a conductive paste on the base plate and drying the conductive paste on the base plate includes placing a first mask having a hole having a first size on the base plate; applying a conductive paste on the first mask, and pressing the conductive paste using a squeegee; filling the hole having a first size in the first mask with the conductive paste, and sticking a bottom of the conductive paste to the base plate; and removing the first mask and drying the conductive paste, thus forming the first paste bump.
摘要:
A method of fabricating a multilayer printed circuit board includes preparing a first substrate, and preparing a second substrate, in parallel to the formation of the first substrate, that is, at the same time of the formation of the first substrate, by forming a third inner circuit pattern on one surface of a third insulating layer and forming a window on the other surface of the third insulating layer.
摘要:
This invention relates to a multilayer printed circuit board and a method of fabricating the same, which can increase the reliability of the multilayer printed circuit board and can decrease the process time to thus improve productivity.
摘要:
A method for transmitting a transport block includes segmenting the transport block into code blocks corresponding in number to a multiple of the number of layers to be used for the transmission of the transport block, attaching a Cyclic Redundancy Check (CRC) to the segmented code blocks, sequentially mapping the code blocks to which the CRC has been attached to at least one layer according to a predetermined mapping rule, and transmitting the code blocks.
摘要:
A method of transmitting data in a wireless access system is disclosed. The method includes various processes of obtaining the number of code blocks in consideration of an error detection code which is to be attached to each code block, calculating the size of the code blocks, segmenting input data, and channel-coding the code blocks, thereby efficiently transmitting data.
摘要:
A dual mode terminal for providing location-based services is provided. The dual mode terminal includes a first area including a first wireless communication unit for communication with a first communication network and a first processor for processing signals transmitted and received to and from the first communication network, and a second area including a second wireless communication unit for communication with a second communication network and a second processor for processing signals transmitted and received to and from the second communication network. The first wireless communication unit includes a GPS receiver for receiving satellite GPS signals. The first processor includes a GPS engine for processing network location information received from the first communication network and the second communication network, and the second processor transfers network location information received from the second communication network to the first processor.
摘要:
A method of manufacturing a substrate using a carrier, that includes preparing a carrier having a releasing layer, and insulating layers and metal layers sequentially disposed on both sides of the releasing layer; patterning the metal layers to form base circuit layers; forming buildup layers on the base circuit layers; executing a routing process to separate the insulating layers from the releasing layer; and forming solder resist layers on the buildup layers and forming openings in the solder resist layers and the insulating layers to expose pads.
摘要:
A method for transmitting a transport block includes segmenting the transport block into code blocks corresponding in number to a multiple of the number of layers to be used for the transmission of the transport block, attaching a Cyclic Redundancy Check (CRC) to the segmented code blocks, sequentially mapping the code blocks to which the CRC has been attached to at least one layer according to a predetermined mapping rule, and transmitting the code blocks.
摘要:
The present disclosure relates to a fence. More particularly, the disclosure relates to a fence capable of adapting to any angle of inclination comprising a plurality of columns, horizontal connecting members which have more than one degree of freedom through a connection between a pair of columns and vertical connecting members which are connected to the horizontal connecting members. The fence can be constructed easily on the ground irrespective of its angle of inclination and its linkage sections are completely protected from the outside exposure while having a sufficient structural strength.