Browse Prior Art Database

Stacked Board Power Bus Design

IP.com Disclosure Number: IPCOM000100892D
Original Publication Date: 1990-Jun-01
Included in the Prior Art Database: 2005-Mar-16
Document File: 3 page(s) / 70K

Publishing Venue

IBM

Related People

Balan, AL: AUTHOR [+3]

Abstract

In a supercomputer, the processor circuit boards are typically stacked vertically in a tower fashion. The boards contain electronic components that require high amounts of power which must be input at the only available location, the outside edges of the boards.

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This is the abbreviated version, containing approximately 71% of the total text.

Stacked Board Power Bus Design

       In a supercomputer, the processor circuit boards are
typically stacked vertically in a tower fashion.  The boards contain
electronic components that require high amounts of power which must
be input at the only available location, the outside edges of the
boards.

      Fig. 1 illustrates a machine containing a stack of octagonal
boards 1.  The power supplies 2 for this machine are located at the
top and bottom of the stack and apply power to the stack via multiple
layer laminar or single layer buses 3 that project vertically out of
the supply areas 2 to run vertically around the perimeter of the
stack of boards 1.  To make maintenance and repair feasible in this
package, the buses 3 must be easily removed, which means a pluggable
connection from bus 3 to board 1 is required.

      Fig. 2 is a close-up of one of the bus connection areas.  The
connection to the board is provided by cutting a notch 4 in the board
edge which exposes the desirable power planes, that is, those planes
that require a certain voltage level.  Only one voltage level is
exposed per notch 4 which can be multiple planes per board.  The
notch 4 is then plated to have a surface area that will conduct
current into the planes.  Into this plated slot is placed an insert 5
containing a commercially available louvered device which transmits
the current from the bus feeder leg 6 to the board slot.

      The bus feeder legs 6 are flexible to allow f...