Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Patent
1998-03-31
1999-08-10
Picard, Leo P.
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
361772, 361783, 361728, 361765, 361736, 361767, 361807, 361808, 257698, 257690, 257774, 257782, 257692, 257773, 22818021, 2281791, 439 69, H05K 114, H01L 2700
Patent
active
059368446
ABSTRACT:
A memory system printed circuit board having an array of memory units disposed on a surface of the printed circuit board. The memory units are arranged in a matrix of row and columns. A first pair of elongated electrical conductor is disposed on an inner portion of the printed circuit board. Each one of the electrical conductors has disposed along a length thereof a plurality of laterally displaced legs. Each one of the legs has a proximal end extending from the conductor. A plurality of conductive vias pass through the printed circuit board, each one of such vias having one end thereof in contact with a one of the legs and a second end at the surface of the printed circuit board for electrical connection to a corresponding one of the rows of memory units. An array of electrical contact pads disposed on a surface of the printed circuit board and arranged for connection to balls of a ball grid array package, such pads being arranged in rows. A second pair of the electrical conductors electrically connected to corresponding alternating ones of rows of the pads through a corresponding one of a pair of second conductive vias, each one the conductors in the second pair thereof being electrically connected to a corresponding one of the conductors in the first pair thereof. Contact pads are disposed between the alternating ones of the rows are electrically isolated from said pair of electrical conductors.
REFERENCES:
patent: 4761881 (1988-08-01), Bora et al.
patent: 5420751 (1995-05-01), Burns
patent: 5661339 (1997-08-01), Clayton
patent: 5754408 (1998-05-01), Derouiche
EMC Corporation
Foster David
Picard Leo P.
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