Printed wiring board and method for manufacturing same
First Claim
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1. A printed wiring board, comprising:
- a plurality of conductive layers having a plurality of conductive circuits;
a plurality of resin insulation layers including an uppermost resin insulation layer positioned as an outermost layer of the plurality of resin insulation layers;
a plurality of via conductors formed in the plurality of resin insulation layers, respectively, and connecting the plurality of conductive circuits in the plurality of conductive layers; and
a plurality of component-loading pads each comprising a metal foil and positioned to load an electronic component,wherein the resin insulation layers and the conductive layers are alternately laminated, and the component-loading pads are formed on a roughened surface of the uppermost resin insulation layer and have top surfaces and side surfaces exposed over the roughened surface of the uppermost resin insulation layer such that the top surfaces and side surfaces of the component-loading pads are configured to mount a plurality of solder structures, respectively.
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Abstract
A printed wiring board includes multiple conductive layers having conductive circuits, multiple resin insulation layers having openings and including the uppermost resin insulation layer positioned as the outermost layer of the resin insulation layers, multiple via conductors formed in the openings, respectively, and connecting the conductive circuits in the conductive layers, and multiple component-loading pads formed of a copper foil and positioned to load an electronic component. The resin insulation layers and the conductive layers are alternately laminated, and the component-loading pads are formed on the uppermost resin insulation layer.
48 Citations
20 Claims
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1. A printed wiring board, comprising:
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a plurality of conductive layers having a plurality of conductive circuits; a plurality of resin insulation layers including an uppermost resin insulation layer positioned as an outermost layer of the plurality of resin insulation layers; a plurality of via conductors formed in the plurality of resin insulation layers, respectively, and connecting the plurality of conductive circuits in the plurality of conductive layers; and a plurality of component-loading pads each comprising a metal foil and positioned to load an electronic component, wherein the resin insulation layers and the conductive layers are alternately laminated, and the component-loading pads are formed on a roughened surface of the uppermost resin insulation layer and have top surfaces and side surfaces exposed over the roughened surface of the uppermost resin insulation layer such that the top surfaces and side surfaces of the component-loading pads are configured to mount a plurality of solder structures, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for manufacturing a printed wiring board, comprising:
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providing a metal foil having a roughened surface; forming a resin insulation layer on the roughened surface of the metal foil; forming an opening in the resin insulation layer; forming a conductive circuit on the resin insulation layer; forming in the opening a via conductor such that the conductive circuit is connected to the metal foil; removing a portion of the metal foil from the resin insulation layer such that the resin insulation layer has a roughened surface imprinted by a removed portion of the roughened surface of the metal foil and an uppermost resin insulation layer comprising the resin insulation layer is formed; and forming a component-loading pad configured to load an electronic component and comprising a remaining portion of the metal foil such that the component-load pad is formed on the roughened surface of the uppermost resin insulation layer and has a top surface and a side surface exposed over the roughened surface of the uppermost resin insulation layer and configured to mount a solder structure. - View Dependent Claims (17, 18, 19, 20)
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Specification