Abstract:
Provided are a photoelectric device using a PN diode and a silicon integrated circuit (IC) including the photoelectric device. The photoelectric device includes: a substrate; and an optical waveguide formed as a PN diode on the substrate, wherein a junction interface of the PN diode is formed in a direction in which light advances; and an electrode applying a reverse voltage to the PN diode, wherein N-type and P-type semiconductors of the PN diode are doped at high concentrations and the doping concentration of the N-type semiconductor is higher than or equal to that of the P-type semiconductor.
Abstract:
A circuit board includes: an insulator having a groove; a circuit layer filling a portion of the groove; a solder pad on the circuit layer filling the remainder of the groove; and a circuit pattern electrically connected with the circuit layer, the circuit pattern buried in the insulator such that a portion of the circuit pattern is exposed at a surface of the insulator.
Abstract:
Provided is an optical device having a strained buried channel area. The optical device includes: a semiconductor substrate of a first conductive type; a gate insulating layer formed on the semiconductor substrate; a gate of a second conductive type opposite to the first conductive type, formed on the gate insulating layer; a high density dopant diffusion area formed in the semiconductor substrate under the gate and doped with a first conductive type dopant having a higher density than the semiconductor substrate; a strained buried channel area formed of a semiconductor material having a different lattice parameter from a material of which the semiconductor substrate is formed and extending between the gate insulating layer and the semiconductor substrate to contact the high density dopant diffusion area; and a semiconductor cap layer formed between the gate insulating layer and the strained buried channel area.
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:
A ring binder includes at least two first and second pipes which are hollow inside; a first ring positioned at an end of the first pipe to be opened and closed; a second ring positioned between the first pipe and the second pipe to be opened and closed; a third ring positioned at an end of the second pipe to be opened and closed; and a support bar passing through the first and second pipes and the first through third rings and holding the first and third rings so that the first and third rings are not separated from the first and second pipes, wherein ends of first, second, and third stationary half rings are combined with and separated from ends of first, second, and third rotating half rings.
Abstract:
A method of manufacturing a circuit board, which includes a bump pad on which a solder bump may be placed, may include forming a solder pad on a surface of a first carrier; forming a metal film, which covers the solder pad and which extends to a bump pad forming region; forming a circuit layer and a circuit pattern, which are electrically connected with the metal film, on a surface of the first carrier; pressing the first carrier and an insulator such that a surface of the first carrier and the insulator faces each other; and removing the first carrier. Utilizing this method, the amount of solder for the contacting of a flip chip can be adjusted, and solder can be filled inside the board, so that after installing a chip, the overall thickness of the package can be reduced.
Abstract:
Provided is a semiconductor integrated circuit. The semiconductor integrated circuit includes a semiconductor pattern disposed on a substrate and including an optical waveguide part and a pair of recessed portions. The optical waveguide part has a thickness ranging from about 0.05 μm to about 0.5 μm. The recessed portions are disposed on both sides of the optical waveguide part and have a thinner thickness than the optical waveguide part. A first doped region and a second doped region are disposed in the recessed portions, respectively. The first and second doped regions are doped with a first conductive type dopant and a second conductive type dopant, respectively. An intrinsic region is formed in at least the optical waveguide part to contact the first and second doped regions.
Abstract:
A circuit board including: an insulator having a trench; a first circuit pattern formed to bury a portion of the trench; and a second circuit pattern formed on a surface of the insulator having the trench formed therein.
Abstract:
A semiconductor package and a method of manufacturing the semiconductor package. The semiconductor package include a substrate including a plurality of pads and a plurality of bumps evenly disposed on an entire region of the substrate regardless of an arrangement of the plurality of pads. According to the present invention, a simplification of a process can be accomplished, a cost of a process can be reduced, reliability can be improved and an under-filling can become easy.
Abstract:
A method of manufacturing a circuit board, which includes a bump pad on which a solder bump may be placed, may include forming a solder pad on a surface of a first carrier; forming a metal film, which covers the solder pad and which extends to a bump pad forming region; forming a circuit layer and a circuit pattern, which are electrically connected with the metal film, on a surface of the first carrier; pressing the first carrier and an insulator such that a surface of the first carrier and the insulator faces each other; and removing the first carrier. Utilizing this method, the amount of solder for the contacting of a flip chip can be adjusted, and solder can be filled inside the board, so that after installing a chip, the overall thickness of the package can be reduced.