Abstract:
PROBLEM TO BE SOLVED: To change the capacity easily without the design constraints, to accommodate increase in the capacity, and to facilitate incorporation of a capacitor in a substrate. SOLUTION: The capacitor 10 includes a dielectric substrate 11 and a large number of filamentous conductors 12 formed to penetrate through the dielectric substrate in the thickness direction thereof. An electrode 15a, 16a is connected to only respective one ends of a plurality of filamentous conductors 12 constituting one of groups each composed of a plurality of filamentous conductors. The electrode is disposed in at least one position on each of both surfaces of the dielectric substrate 11, or in at least two positions on one of the surfaces. Further, an insulating layer 13, 14 is formed on each of both surfaces of the dielectric substrate 11 so as to cover regions between the electrodes 15a, 16a, and a conductor layer 15, 16 is formed on the corresponding insulating layer 13, 14 integrally with a desired number of electrodes 15a, 16a. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a printed wiring board capable of suppressing the generation of stress. SOLUTION: In the printed wiring board 11, the same structure is established which includes a large-diameter via 18, a filler 21 for a lower hole, and a through-hole 24 and a small-diameter via 25 in each of the through-holes 17 for lower holes distributed to at least a specific region. As a result, at a specific region, a ratio of the filler 21 for lower holes and that of a core layer 13 are prescribed to a uniform distribution in an in-plane direction of the core layer 13, thus suppressing the generation of a warp caused by the thermal stress in the in-plane direction of the core layer 13. Also, when all the through-holes 17 for lower holes distributed to at least a specific region are disposed mutually equally, the warp caused by the thermal stress in the in-plane direction of the core layer 13 is avoided reliably. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a wiring substrate capable of forming substrate management information without increasing the manufacturing cost too much and enabling high-density packaging, to provide a manufacturing method thereof, and to provide a semiconductor package containing the wiring substrate. SOLUTION: A wiring substrate includes an alternate lamination of wiring layers and insulating layers wherein the adjacent wiring layers are electrically interconnected through via-holes formed on the insulating layer. The outermost one of the insulating layers has a plurality of holes forming substrate management information capable of being recognized as characters and symbols. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To prevent a deterioration in electrical characteristics of a multilayer circuit board on which signal, ground and power supply lines are densely arranged even when its density is increased. SOLUTION: The multilayer wiring board has a structure in which first wiring layers 12A to 12D having one or several kinds of lines out of the signal line 25 having signal electrodes 15, the power supply line 26 having power supply electrodes 16 or the ground line 27 having ground electrodes 17 and several first insulating layers 11A to third insulating layers 11C which are alternately stacked. In this case, the signal line 25 and the power supply line 26 or the signal line 25 and the ground line 27 are alternately arranged on the first wiring layer 12A of the insulating layer. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method of flattening a level difference caused by the projection of a conductive part without any trouble, in a manufacturing method of a wiring board which has a structure wherein the conductive part is inserted into the through-hole of a core board while having the projection protruding from the core board. SOLUTION: The method of flattening a level difference comprises processes of preparing the core board 10 equipped with a through-hole 10a arranging the conductive part 20 in the through-hole 10a making the tips of the conductive part 20 serve as projections 20a and 20b protruding from the core board 10 by inserting the conductive part 20 longer than the thickness of the core board 10 into the through-hole 10a of the core board 10, forming insulating films 12a and 12b on the core board 10 so as to cover the projections 20a and 20b of the conductive part 20, and flattening the insulating films 12a and 12b by grinding them. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a conductive sheet which has reliable electric connectivity, reduced in production cost, and improved in dimensional accuracy simultaneously. SOLUTION: A conductive layer is formed on both the front and rear surface of the insulating base of the conductive sheet respectively, the conductive layers formed on the surfaces of the insulating base are electrically connected together through a through-hole bored in the insulating base penetrating through it, and the conductive layer of the same composition is formed on the front and rear surface of the insulating base and on the inner wall of the through-hole in the same process. COPYRIGHT: (C)2005,JPO&NCIPI