Silicon Graphics, Incorporated

Cray Incorporated

Jeffrey S Conger

Stephen A Bowen

Stephen Cermak, Iii

David Paul Gruber

Thomas Alex Crapisi

Mark Ronald Sikkink

Rodney A Ruesch

Hyunjun Kim

Bonnie Kay Dobbs

Gregory E Scott

Steven Shafer

A multi-layer printed circuit board has a number of landing pads that are configured to engage a connector secured thereto. Between the landing pads associated with different signals is at least one micro via that is electrically connected to a ground plane on an outer surface of the multi-layer printed circuit board, and a ground plane on an inner layer of the multi-layer printed circuit board.

Printed circuit board with reduced cross-talk

New methods and configurations are provided that allow for a large memory capacity, as well as minimized interconnect distances between the memory chips and one or more processors, and the HUB chip-set. The apparatus, configurations and methods include providing a printed circuit board having one or more processor conductive portions and one or more z-axis connector conductive portions in close proximity with each other, and connecting the one or more processors on one side of a printed circuit board, and connecting the one or more z-axis connectors for the memory daughter cards on the opposite side of the processor board. Standoffs are used to support and secure the horizontally disposed z-axis memory daughter cards and to ensure proper spacing between the z-axis daughter cards and the processor board Standoffs include an alignment pin portion and a spacer portion. The alignment pin portion includes an alignment portion, foot, and urging portion. The spacer portion includes pin coupler, relief portion, and aperture. The standoff is inserted into an aperture of a first printed circuit board and turned 90 degrees to secure the spacer portion and the foot to the first printed circuit board. An aperture in a second printed circuit board is slid over the alignment pin portion, wherein the second printed circuit board rests on the spacer portion. The fastening means is used through an aperture in the second printed circuit board communicating with the spacer portion.

Memory daughter card apparatus, configurations, and methods

A printed circuit board apparatus, configurations and methods are presented which provide for close spacing between the HUB and multiple processors as well as a common configuration for two or four processor boards. A printed circuit board is provided with conductive apertures and portions corresponding to an efficient Packaging allowing for the attachment of the processor-chip on one side of the printed circuit board, and the HUB and other supporting electronic components on the other side of the printed circuit board. This configuration allows for the close spacing of the electrical conductors of the HUB and the processors without the limitations imposed by the physical dimensions of the respective hardware. Additionally, a symmetric packaging of the conductive apertures and portions about a centerline of the printed circuit board allows for a simple design modification to allow for a two two-processor board to be manufactured from a similarly configured four-processor board.

Printed circuit board component packaging

Growing community of inventors

Eau Claire, WI, United States of America

Jeffrey S Conger