Abstract:
A method of manufacturing a printed circuit board having a bump is disclosed. The method includes preparing a first carrier having a first circuit formed thereon, compressing the first carrier to one surface of an insulation layer such that the first circuit is buried, stacking an etching resist on the first carrier in accordance with where the bump is to be formed and forming the bump by etching the first carrier. In accordance with an embodiment of the present invention, the difference in height between a bump and its adjacent bump in a printed circuit board can be reduced, and thus electrical connection between an electronic component and the printed circuit board can be better implemented.
Abstract:
A substrate support unit of a substrate processing apparatus includes a first support member, a second support member, a buffer member and a tube. The first support member has an electrode and a heater built-in and supports the substrate. The second support member is disposed beneath the first support member to support the first support member. The buffer member is disposed between the first support member and the second support member to form an air gap between the first support member and the second support member so as to reduce heat transfer between the first support member and the second support member. The tube is connected with a lower surface of the first support member. Further, the tube extends through the second support member and receives lines for applying power to the electrode and the heater.
Abstract:
Disclosed is a method of manufacturing a printed circuit board. The method of manufacturing a printed circuit board having a via for interlayer connection can include forming a circuit pattern on one side of a carrier, pressing one side of the carrier into one side of the insulator, removing the carrier, forming a hole penetrating through the insulator by processing one end of the circuit pattern, and forming a conductive material inside the hole to have the conductive material correspond to the via.
Abstract:
Disclosed is a method of fabricating a multilayer printed circuit board, which enables the formation of a micro circuit able to be realized through a semi-additive process using the CTE and rigidity of a metal carrier on a thin substrate which is difficult to convey.
Abstract:
A low density parity code (LDPC) encoding and decoding devices and encoding and decoding methods thereof are provided. An LDPC encoding device includes an information obtaining unit which obtains status information of at least two frequency bands, a matrix generation unit which generates a parity check matrix based on the status information, the parity check matrix including sub matrices which correspond to the at least two frequency bands, and an encoder which generates data bits and parity bits using an LDPC with the generated parity check matrix.
Abstract:
A cognitive radio (CR) communication apparatus and method is provided. A cognitive radio (CR) communication apparatus includes a signal receiving unit which receives signals from a primary user of a primary system and a secondary transmitter of a secondary system, the received signals including an element associated with at least one known signal of the secondary transmitter, and a determination unit which determines whether a signal of the primary user exists from among the received signals based on the element associated with the at least one known signal.
Abstract:
An aspect of the present invention features a manufacturing method of a board on chip package. The method can comprise: (a) laminating a dry film on a carrier film, one side of which is laminated by a thin metal film; (b) patterning the dry film in accordance with a circuit wire through light exposure and developing process, and forming a solder ball pad and a circuit wire; (c) removing the dry film; (d) laminating an upper photo solder resist excluding a portion where the solder ball pad is formed; (e) etching the thin metal film formed on a portion where the upper photo solder resist is not laminated; (f) mounting a semiconductor chip on the solder ball pad by a flip chip bonding; (g) molding the semiconductor chip with a passivation material; (h) removing the carrier film and the thin metal film; and (i) laminating a lower photo solder resist under the solder ball pad. The board on chip package and the manufacturing method thereof according to the present invention can design a high density circuit since a circuit pattern is formed using a seed layer.
Abstract:
A printed circuit board and a method for manufacturing the same are disclosed. The manufacturing method includes: forming a first plating resist corresponding to the circuit pattern on a surface of each of a first carrier and a second carrier; forming a second plating resist corresponding to the pad on each of the surfaces; forming the pad by performing plating over each of the surfaces; stripping the second plating resists; forming the circuit pattern by performing plating over each of the surfaces; pressing the first carrier and the second carrier with an insulation layer interposed between the first carrier and the second carrier such that the circuit patterns face each other; and removing the first carrier and the second carrier. Since plating bars need not be used, the degree of freedom in designing circuits can be increased, and circuits of higher densities can be designed.
Abstract:
A carrier and a method for manufacturing a printed circuit board are disclosed. The method for manufacturing a printed circuit board may include: forming a first circuit pattern on each of a pair of release layers, which are attached respectively to either side of a base layer by adhesive layers; detaching the pair of release layers from the base layer; stacking and pressing the pair of release layers onto either side of an insulation substrate such that the first circuit patterns are buried in the insulation substrate; and separating the pair of release layers. By forming a circuit pattern on each of a pair of release layers with a single process, and transferring the circuit pattern into each side of an insulation substrate, the manufacturing process can be shortened and circuit patterns can be formed to a high density.
Abstract:
Disclosed herein is an apparatus for manufacturing a megapixel multi-focus lens. The lens manufacturing apparatus of the present invention includes a loading means for supplying a mold body, in which a blank, interposed between upper and lower molds, is placed, to a forming position, a compression-forming means, which preheats, compresses and cools the supplied mold body such that the blank is formed into a multi-focus lens having an aspherical surface, and a discharge means, which discharges the multi-focus lens formed by the compression-forming means. Therefore, processes from loading to discharging can be automated, so that the productivity of the apparatus for manufacturing the multi-focus lens can be markedly enhanced. Furthermore, because the lens manufacturing apparatus is covered with a cabinet, a superior appearance thereof is ensured. In addition, because various electric components for controlling the compression-forming means are provided in the cabinet, it is not necessary to separately install electrical control parts for mechanical parts.