摘要:
Provided are a microorganism for use in quantification of homocysteine and methionine and a method of quantifying homocysteine and methionine in a sample by using the microorganism.
摘要:
A printed circuit board having embedded electronic components and a manufacturing method thereof are disclosed. With the printed circuit board having embedded electronic components, including a core sheet, a first electronic component mounted on one side of the core sheet, a second electronic component mounted on the other side of the core sheet and overlapping the first electronic component, a first insulation layer stacked on one side of the core sheet and covering the first electronic component, a second insulation layer stacked on the other side of the core sheet and covering the second electronic component, and a circuit pattern formed on the surface of the first insulation layer or the second insulation layer, the density of the printed circuit board having embedded components is improved, as a plurality of electronic components are embedded simultaneously, and when a thin CCL substrate or a metal substrate is used as the core, a metal substrate in particular, the heat-releasing property and mechanical strength are improved, including increased bending strength in a thermal-stress environment, as electronic components are mounted on both sides of the core sheet.
摘要:
A PCB (printed circuit board) having embedded components and a method for manufacturing thereof are disclosed. The PCB may include a dielectric substrate having a cavity formed in one side, a first component inserted in the cavity such that an electrode of the first component faces the one side of the dielectric substrate, a second component mounted on one side of the first component such that an electrode of the second component faces the same direction as the electrode of the first component, a first dielectric layer formed on one side of the dielectric substrate such that the first dielectric layer covers the second component, and a second dielectric layer formed on the other side of the dielectric substrate such that the second dielectric layer covers the first component. In this PCB, multiple components of differing thickness can be mounted, and vias can be formed more easily.
摘要:
A method of manufacturing a component-embedded printed circuit board component is disclosed. With a method of manufacturing a component-embedded printed circuit board that includes: perforating a through-hole in a core substrate, on a surface of which a circuit pattern is formed, attaching tape to one side of the core substrate and attaching a component onto the tape exposed in the through-hole, filling adhesive in a portion of the gap between the through-hole and the component to secure the component, removing the tape, and collectively stacking insulation on both sides of the core substrate to fill the remainder of the gap between the through-hole and the component with portions of the insulation, the component may be embedded using a minimal amount of heterogeneous materials, so that the warpage of the board may be prevented
摘要:
A printed circuit board and manufacturing method thereof are disclosed. By use of a method of manufacturing a printed circuit board, which uses a metal substrate as a core member and has an electronic component embedded in the metal substrate, mainly comprising: (a) anodizing at least one surface of the metal substrate to form at least one insulation layer, (b) forming an inner layer circuit on the at least one insulation layer, (d) placing chip bond adhesive in correspondence with a position where the electronic component is to be embedded and mounting the electronic component, and (e) forming an outer layer circuit in correspondence with a position where the inner layer circuit is formed and with positions of the electrodes of the electronic component, and which may further comprise an operation (c) of etching the metal substrate to form a cavity in correspondence with a position where the electronic component is to be embedded between the operations (b) and (d), a metal substrate, such as that of aluminum, etc., is rendered electrically insulating by applying an anodizing process and is used as a core member in a printed circuit board, so that bending stiffness and heat-releasing property are improved; wet etching can be applied, so that manufacturing costs are reduced; and a chip bond adhesive, die attach film, or nonconductive paste, etc., that is high in thixotropy is used in embedding the electronic component, so that the degree of precision may be increased for the position and height of the electronic component when embedding the electronic component.
摘要:
Disclosed is a printed circuit board having an embedded electronic component, including a metal substrate having a first cavity formed in a thickness direction and a support plate integrated with one side of the metal substrate and formed in the first cavity. Thereby, a method of manufacturing such a printed circuit board is also provided. When manufacturing the printed circuit board having an embedded electronic component, there is no need for an additional member including support tape to seat the electronic component, thus simplifying the manufacturing process and reducing lead time, thereby improving productivity.
摘要:
Provided is a PCB having electronic components embedded therein, the PCB including a core layer having electronic components embedded therein and a resin layer formed thereon and thereunder; internal layer circuits formed on the resin layer and being electrically connected to the electronic components; an insulating layer formed on the internal layer circuits; and external layer circuits formed on the insulating layer and being electrically connected to the internal layer circuits.
摘要:
A printed circuit board having embedded electronic components and a manufacturing method thereof are disclosed. With the printed circuit board having embedded electronic components, including a core sheet, a first electronic component mounted on one side of the core sheet, a second electronic component mounted on the other side of the core sheet and overlapping the first electronic component, a first insulation layer stacked on one side of the core sheet and covering the first electronic component, a second insulation layer stacked on the other side of the core sheet and covering the second electronic component, and a circuit pattern formed on the surface of the first insulation layer or the second insulation layer, the density of the printed circuit board having embedded components is improved, as a plurality of electronic components are embedded simultaneously, and when a thin CCL substrate or a metal substrate is used as the core, a metal substrate in particular, the heat-releasing property and mechanical strength are improved, including increased bending strength in a thermal-stress environment, as electronic components are mounted on both sides of the core sheet.
摘要:
A radio frequency switch is disclosed. The switch includes a plurality of first substrates in which a ground surface is formed on each of the first substrates and a micro-strip line and a semiconductor on/off switch are disposed on a plane surface of the ground surface, a plurality of second substrates in which a ground surface is formed on each of the second substrates and a micro-strip line is disposed on a plan surface of the ground surface, the second substrates being combined with the first substrates so as to cross each other and being electrically connected to the first substrates, and combining means for combining the first and second substrates so as to cross each other.
摘要:
A method of manufacturing a component-embedded printed circuit board is disclosed. By using a method of manufacturing a component-embedded printed circuit board, which includes: mounting a component on a first copper foil, on which a pattern is formed, such that the component is electrically connected with the pattern; stacking an insulation layer, which has a cavity formed in a position corresponding to the component, on a second copper foil, on which at least one conductive protrusion is formed; stacking together the first copper foil and the second copper foil such that the component is embedded in the cavity and the first copper foil and the second copper foil are electrically connected by the conductive protrusion; and removing portions of the first copper foil and the second copper foil to form circuit patterns, the circuit pattern formed from the first copper foil may be given a buried form, so that it is possible to manufacture a thin printed circuit board, when embedding a flip chip type component.