Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Patent
1993-02-01
1995-05-23
Picard, Leo P.
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
361794, 361795, 174250, 174260, 174262, 174266, H05K 111
Patent
active
054186897
ABSTRACT:
A printed circuit board or card for direct chip attachment that includes at least one power core, at least one signal plane that is adjacent to the power core, and plated through holes for electrical connection is provided. In addition, a layer of dielectric material is adjacent the power core and a circuitized conductive layer is adjacent the dielectric material, followed by a layer of photosensitive dielectric material adjacent the conductive layer. Photodeveloped blind vias for subsequent connection to the power core and drilled blind vias for subsequent connection to the signal plane are provided. Also provided is process for fabricating the printed circuit board or card for direct chip attachment.
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patent: 5025555 (1991-06-01), Mase
Alpaugh Warren A.
Markovich Voya R.
Trivedi Ajit K.
Zarr Richard S.
International Business Machines - Corporation
Ledynh Bot
Picard Leo P.
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