Abstract:
PROBLEM TO BE SOLVED: To provide a signal transmission circuit that allows reduction in crosstalk noise between signal lines and reduction in refraction noise due to a stub, while using a circuit board with a low cost and high packaging density.SOLUTION: A signal transmission circuit according to the present invention is configured such that lead terminals of electronic components and through-hole vias are connected by surface wiring, and a branching is not provided in the middle of the through-hole vias. Besides, first wiring connecting a first electronic component is arranged between second wiring connecting a second electronic component, and signals are transmitted between the first wiring and the second wiring by interleaved transmission.
Abstract:
PROBLEM TO BE SOLVED: To provide a stacked chip capacitor in which low ESL and high ESR characteristics can be fully satisfied without changing the material.SOLUTION: The stacked chip capacitor comprises a capacitor body having first and second capacitor units arranged along the stacking direction, and a plurality of external electrodes formed on the external surface of the body. The first capacitor unit includes at least a pair of first and second internal electrodes arranged alternately in the body, and the second capacitor unit includes a plurality of third and fourth internal electrodes arranged alternately in the body. The first through fourth internal electrodes are connected with the first through fourth external electrodes. ESL of the first capacitor unit is smaller than that of the second capacitor unit, and ESR of the first capacitor unit is larger than that of the second capacitor unit.
Abstract:
In a manufacturing method of a hybrid integrated circuit device 10 according to the present invention, a first dummy pattern D 1 is provided on a first wiring layer 18 A. Furthermore, a second dummy pattern D 2 is provided on a second wiring layer 18 B. The first dummy pattern D 1 and the second dummy pattern D 2 are connected through a connection part 25 which penetrates an insulation layer 17 . Hence, heat dissipation through a dummy pattern can be actively performed. In addition, even in the cases where a multi-layered wiring is formed, it is possible to provide a circuit device which can secure a heat dissipation property.
Abstract:
PROBLEM TO BE SOLVED: To obtain a printed wiring board with which bonding strength of a bump and a pad is improved. SOLUTION: The printed wiring board 15 has a plurality of pads 35 to which bumps 25 are bonded. The pads 35 are independent of each other and are formed of a plurality of corresponding conductors 32a and 32b with respect to a single bump 25. A clearance g1, into which a portion of the bump 25 enters when the bump 25 is bonded to the pad 35, is provided between the plurality of conductors 32a and 32b. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To enable a printed circuit board, which is used in various electronic instruments and mounted with a chip type solid-state electrolytic capacitor, to be reduced more in ESL. SOLUTION: The printed circuit board is mounted with a chip type solid-state electrolytic capacitor of four-terminal structure where anode terminals and cathode terminals are arranged at the two opposed positions intersecting each other. The anode terminals and cathode terminals of the chip type solid-state electrolytic capacitor are configured in such a manner that an anode electrode pattern 2 composed of a pair of the soldered anode electrodes and a cathode electrode pattern 4 composed of a pair of the cathode electrodes are provided and that an inductor 3 is provided so as to electrically connect the anode electrode patterns 2 together, so that a π filter is formed to reduce the ESL of the printed circuit board remarkably. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To adjust the height of a bump electrode connected to a land for a board. SOLUTION: A semiconductor device 100 has a first wiring board 103 and a second wiring board 101. First lands 111 and second lands 113 are formed on one surface of these boards. The plane shapes of the second lands 113 are formed in polygons having the areas of inscribed circles smaller than those of the first lands 111. COPYRIGHT: (C)2007,JPO&INPIT