Abstract:
PROBLEM TO BE SOLVED: To improve connection reliability by enabling POP (package-on-package) connection to be easily made, and to contribute to miniaturization and thinning. SOLUTION: A wiring board (package) 10 has a cavity CV formed in an outermost insulating layer 12 on one surface side of the wiring board at a position corresponding to a chip mounting area, and includes a pad P1 exposed on a surface of the insulating layer 12 in the cavity CV and a pad P2 exposed on the surface of the insulating layer 12 at a periphery of the cavity CV. Then a chip 31 is flip-chip connected to the pad P1 in the cavity CV of the package 10, and another package 40 is connected to the pad P2 at the periphery of the cavity CV to constitute a semiconductor device 30 having a POP structure. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a structure of a printed circuit board comprising a metal bump having fine pitches and uniform height, and a method of manufacturing the same. SOLUTION: The printed circuit board includes: metal bumps 900 having constant diameters and protruding over an insulation layer 300; a circuit layer 530 formed beneath the insulation layer 300; and vias 510 passing through the insulation layer 300 to electrically connect the metal bumps 900 with the circuit layer 530. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To sufficiently uniformize resistance values of a plurality of interconnection lines 26. SOLUTION: An interconnection line wiring device has an insulating layer 24 for electrical insulation, a connection portion 32 provided penetrating the insulating layer 24, an external connection terminal 28 formed on one surface of the insulating layer 24, and the interconnection line 26 formed on the other surface of the insulating layer 24. Then the connection portion 32 connects the external connection terminal 28 and interconnection line 26 to each other. Further, one end of the interconnection line 26 is connected to a conductor 27. The other end of the interconnection line 26 is connected to the external connection terminal 28 by the connection portion 32 at a position predetermined distance from a first end of the external connection terminal 28 on the side of the conductor 27. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a flexible printed circuit board the lamp of which can be lit, even if breakage part occurs at an end part of a power source applying wire to be connected to the lamp. SOLUTION: The flexible printed circuit board has a base film formed by an insulating substance; a power source applying wire arranged on one surface of the base film, a bypass wire arranged on the other surface of the base film in opposition to the one surface; a first connection wire to electrically connect the power source applying wire and the bypass wire; a second connection wire, to electrically connect the power source applying wire and the bypass wire and arranged so as to be separated from the first connection wire; and a first cover film that is arranged on the one surface of the base film and the power source applying wire, which covers the second connecting wire and exposes the first connecting wire. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a printed-circuit board with a frame ground part thin-formed. SOLUTION: The printed-circuit board includes: the frame ground parts 11 with conductive patterns 13a, 13b formed in the periphery of installation holes 12 for fixing; and a plurality of through-holes 14 provided in the periphery of the installation holes 12 of the frame ground part 11. The method of forming the printed-circuit board includes the steps of: applying the cream solder 15 to the through-holes 14 in a cream solder printing step in a component mounting step; melting the cream solder 15 in a reflow step; introducing a part of the melted cream solder 15 into the through-holes 14; attaching them to the conductive patterns 13a, 13b of the through-holes 14 and their periphery; and forming the solder film. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To achieve size reduction and cost reduction of a mounting board by avoiding trouble caused by a rise in temperature of a mounted electronic component and decreasing the number of external components. SOLUTION: The wiring board 30 mounted with the electronic component 40 has a switch element portion 21 interposed in a signal transmission line including a wiring layer 13 connecting with an electrode terminal 41 of the electronic component 40. The switch element portion 21 has a structure changing in shape depending upon temperature, and blocks the signal transmission line when the temperature exceeds a predetermined temperature. On a bottom portion of a cavity CV formed on an electronic component mounting surface side of the wiring board 30, a conductor layer 22 is formed which forms a portion of the signal transmission line. One end of the switch element portion 21 is fixedly connected to the wiring layer 13, and the other end is in contact with the conductor layer 22 when the temperature is below a predetermined temperature. COPYRIGHT: (C)2009,JPO&INPIT