Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a printed wiring board which prevents drooping when a lower hole is filled with an insulation material.SOLUTION: In a manufacturing method of a printed wiring board, a process where a lower hole 3 is formed on a surface part of a conductive base material 2 having a low thermal expansion coefficent and a process where a peeling film 12 is bonded to the surface part 2c of the base material 2 on a bottom surface side of the lower hole 3, thereby forming a bottom part 8 closing the bottom surface side of the lower hole 3 with the bonded film 12 are conducted. Further, in the manufacturing method, a process that the lower hole 3 is filled with an insulation material 4 and a process where multiple through holes 5 are formed in the lower hole 3 filled with the insulation material 4 are conducted.
Abstract:
PROBLEM TO BE SOLVED: To provide an electronic circuit including an integrated circuit as a noise source, a bypass capacitor, and a circuit board having them mounted thereon, and suppressing a noise radiation level.SOLUTION: The electronic circuit has the integrated circuit 1, the bypass capacitor 7, and the circuit board 3 having the integrated circuit 1 and the bypass capacitor 7, mounted thereon. In the electronic circuit, one electrode terminal 8a of the bypass capacitor 7 and one connecting electrode 2a of the integrated circuit 1 are connected through a first connection wiring 4a formed on the circuit board 3, and, additionally, another electrode terminal 8b of the bypass capacitor 7 and another connecting electrode 2b of the integrated circuit 1 are connected through a second connection wiring 4b formed on the circuit board 3, and a gap between the first connection wiring 4a and the second connection wiring 4b is made smaller than either a gap between the connecting electrodes 2a, 2b on the integrated circuit 1, or a gap between the electrode terminals 8a, 8b of the bypass capacitor 7.
Abstract:
PROBLEM TO BE SOLVED: To suppress inductance in signal transmission paths of a high-frequency module which is provided with a laminated substrate and includes the signal transmission paths interconnecting several circuit elements and terminals. SOLUTION: The high-frequency module 1 is provided with the laminated substrate 200. The laminated substrate 200 has a bottom 200a and a top 200b. A terminal Rx11 is arranged on the bottom 200a. A SAW filter 121 and an inductor 81 are mounted on the top 200b. The laminated substrate 200 has a conductor layer 433 which connects the SAW filter 121 and the inductor 81, a conductor layer 451 which is arranged at a position nearer to the bottom 200a than to the conductor layer 433 and is connected with the terminal Rx11 and several parallel signal paths 701 and 702, each of which is constituted of at least one through-hole provided in the laminated substrate 200, and which connect the conductor layer 433 and the conductor layer 451. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To reduce noise generated by a return current flowing in a multilayered substrate. SOLUTION: The substrate includes: an insulating substrate 2; two sets of wiring 311, 312; signal lines 321, 322, 331 and 332; and vias 323, 333, 341 and 342. Two sets of wiring 311, 312 are laminated in a prescribed direction 90 via an insulating board 202 of a part of the insulating substrate 2 between surfaces 21a, 21b. The signal lines 321, 331 are arranged on the surface 21a so as to face the wiring 311. The signal lines 322, 332 are arranged on the surface 21b so as to face the wiring 312. The via 323 connects the signal lines 321, 322. The via 333 connects the signal lines 331, 332. The vias 341, 342 are arranged on the insulating board 202 so as to connect two sets of wiring 311, 312. The via 341 is arranged close to the via 323, and the via 342 is arranged close to the via 333. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a printed circuit board at low cost which can be applied to a circuit board wherein a base lock operates at a high speed of 1GHz or more, and can suppress electromagnetic radiation, such as common mode radiation. SOLUTION: The printed circuit board 10 has an arrangement wherein a first signal wiring layer 12, a first ground layer 14, a second ground layer 16 and a second signal wiring layer 18 are stacked through an insulating member 20 with a first through hole 100 being provided therethrough. First signal wiring 102 is formed in the first signal wiring layer 12, and second signal wiring 104 is formed in the second signal wiring layer 18 with the signal wiring 102 and the signal wiring 104 being connected through the through hole 100. The conductive first ground layer 14 and the second ground layer 16 are connected through a second through hole 106. The second through hole 106 is formed so as to be insulated from the first through hole 100, and to surround the first through hole 100. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
A printed circuit board includes an insulating layer; a recess portion disposed on one surface of the insulating layer; and a circuit layer disposed on the one surface of the insulating layer and including a signal pattern and a ground pattern. At least a portion of the ground pattern covers at least a portion of the recess portion.
Abstract:
Embodiments herein relate to systems, apparatuses, or processes to using vias, or plated through holes (PTH), within a substrate or within a sub laminate to create capacitors. The interior of a via may have a first layer, or coating, of an electrically conductive material such as copper, formed on the sides of the via. A second layer including a dielectric material is placed on the first layer of the electrically conductive material. A third layer of electrically conductive material may then be placed on the second layer of the dielectric material. Other embodiments may be described and/or claimed.
Abstract:
A circuit board may include a traditional via electrically coupled to a first layer of the circuit board and coupled to a second layer of the circuit board and a slotted via formed within the circuit board proximate to the traditional via, the slotted via comprising an opening through a first surface and a second surface of the circuit board and a layer of conductive material formed on interior walls of the opening.
Abstract:
A printed circuit board (PCB) is provided for transmitting a differential signal. The PCB includes first and second conductive signal layers. The first conductive signal layer includes a first positive trace of the differential signal and a first negative trace of the differential signal. The second conductive signal layer includes a second positive trace of the differential signal and a second negative trace of the differential signal. The first positive trace is adjacent to the first negative trace, and the second positive trace is adjacent to the second negative trace and directly below the first negative trace.