Abstract:
A printed circuit board is provided to prevent the change of capacitance between a signal transmission line and a ground layer by forming a plurality of ground patterns in the ground layer. A first ground layer(200) is extended to one direction. A first dielectric layer is laminated on a first ground layer. A signal transmission line is laminated on the first dielectric layer. A plurality of first ground patterns(210,212,214,216) are formed in the bottom of the first ground layer. The plurality of the first ground patterns expose the first dielectric layer. A bonding sheet is stacked on the signal transmission line. A second dielectric layer is stacked on the bonding sheet. A second ground layer is laminated on the second dielectric layer. The plurality of second ground patterns are formed in the bottom of the second ground layer by the etching. The plurality of second ground patterns expose the second dielectric layer.
Abstract:
A circuit connection structure and a printed circuit board is provided to miniaturize a printed circuit board and a semiconductor package by suppressing impedance mismatching without increasing the wiring band of a printed circuit board. A printed circuit board(100) comprises a GND layer(102), an insulating layer and a signal wiring layer. The signal wiring layer interposes the insulating layer and is adjacent to the GND layer. The signal wiring layer connects the first area and the second part of the printed circuit board. Two batch of differential signal wires(104,105) are parallely arranged in the signal wiring layer. Between the two batch of differential signal wires, the width of two wires(104a,104b) consisting of a batch of differential signal wires decreases from the first part to the second part with the same ratio. Interval between 2 wirings is fixed. Between the two batch of differential signal wires, one batch of differential signal wires is adjacent to the other batch of differential signal wires. The width of two wires(105a,105b) consisting of the other batch of differential signal wires increases from the first part to the second part with the same ratio. A first slit(104s) and a second slit(105s) are formed in the GND layer.
Abstract:
PURPOSE: A PCB for impedance control is provided to insert one resin deposition film between standard plural resin deposition films to regulate impedance of narrow band. CONSTITUTION: A PCB for impedance control comprises first and second standard resin deposition films(10,30) and a single resin deposition film(20). The standard resin deposition films(10,30) consist of resin deposition films(13,43) having constant thickness, copper films(11,31) coated on one side of the films(13,43) and resin layers(14,34) coated on the other side of the films(13,43). The resin of the layers(14,34) is under semi-cured state. The resin deposition film(20) is inserted between the layers(14,34) to regulate the thickness of overall insulator.
Abstract:
배선 기판(1)이 Cu 또는 Cu 합금으로 구성되는 전극(12)과, 상기 전극(12) 상에 형성된 무전해 니켈 도금층(18)과 상기 무전해 니켈 도금층(18) 상에 형성된 무전해 금 도금층(22)을 갖는 도금 피막(14)을 구비하고, 상기 무전해 니켈 도금층(18)은 Ni, P, Bi 및 S이 공석되어 형성되고, 상기 무전해 니켈 도금층(18)에 포함되는 P의 함유량이 5질량% 이상 10질량% 미만, Bi의 함유량이 1∼1000질량ppm, S의 함유량이 1∼2000질량ppm이며, Bi의 함유량에 대한 S의 함유량의 질량비(S/Bi)가 1.0보다도 크다.
Abstract:
PURPOSE: A substrate for a thin resistor and a method for manufacturing thereof are provided to stability of the contact pattern of the resistor film and an electrode by increasing a contact area between a resistor film and an electrode. CONSTITUTION: A substrate(10) comprises a via hole filler conductive material or a via hole charged with resistance member. A resistor film(30) is formed on the via hole and the substrate. An insulating layer(40) is formed on the resistor film and the substrate. An electrode(50) is formed on the substrate in order to surround the resistor film and insulating layer. The resistor film is comprised of a first resistor portion laminated in the via hole and a second resistor portion laminated on the substrate.
Abstract:
PURPOSE: An impedance measurement apparatus for a printed circuit board(PCB) is provided to measure the impedance by using the phase difference between the original signal and the reflected signal by connecting the pin jigs to a plurality of PCBs. CONSTITUTION: The impedance measurement apparatus for a PCB(1) comprises a table(2), two pin jigs(7a,7b) for generating and inputting the signal by connecting the circuits(3,5) formed on both sides of the PCB, a transmission cable(9) connected to the pin jigs for transmitting the signal, a time domain refectonentory(TDR)(11) connected to the transmission cable for measuring the impedance by analyzing the signal, a data collector and determining unit(13) for collecting the impedance produced in the TDR and for determining the inferior state by comparing the collected impedance with the predefined impedance, and a display unit(15) for displaying the compared result.
Abstract in simplified Chinese:配线基板系具备:以Cu或Cu合金所构成之电极;及具有形成于前述电极上的无电镀镍层、与形成于前述无电镀镍层上的无电镀金层之镀敷皮膜。前述无电镀镍层系Ni、P、Bi、与S共析所形成,前述无电镀镍层中所含有的P的含量系5质量%以上小于10质量%,Bi的含量系1~1000质量ppm,S的含量系1~2000质量ppm,且S的含量对于Bi的含量之质量比(S/Bi)系比1.0大。