International Business Machines Corporation

Daniel Joseph Hunt

Mark Budman

Edward N Dials

Mark J Kuzawinski

William Drummond Owsley

David Earl Riehm

Rudolf Eugene Rehquate

Russell S Padgett

A Lamond Hodges

Joseph Francis Xavier Doman

A computer chassis in accordance with the present invention is disclosed. The chassis includes a first body, a second body, and an electromagnetic shield coupled between the first body and the second body. The shield includes a plurality of dimples and a plurality of valleys for providing an electromechanical seal when the shield is placed in an interference condition. The chassis shielding system utilizes a shield with a design that is inexpensive to manufacture, is structurally sturdy, and simple to implement in an interference environment. In a preferred embodiment, the shield is provided for inserting between a circuit card mounting bracket and a computer chassis. The improved shield design incorporates special features including a plurality of dimples and a plurality of valleys, strategically located for providing improved adjacent surface contact and enhanced shielding from unwanted radiation.

Chassis shielding system

A slot-type processor and one or more cache modules are incorporated into a vertically oriented, multiple chip module (CM) that is mounted to a printed circuit board. The MCM operates at ultra high frequencies and very high temperatures. Each component of the MCM has a heatsink, a thermal plate, and a series of mounting clips and screws which combine to dissipate heat. The heatsinks and thermal plates generate most of the electromagnetic interference (EMI) since they are not attached or grounded to the board. A series of alignment posts extend from the board and are used to individually and slidably mount each of the components to the board. Each thermal plate is grounded to the posts with grounding clips. The clips maintain contact with the thermal plate through wiping elements. Additional pressure is applied to the wiping elements through a post retaining bracket. The components are fully seated and retained in position with retaining cams.

Electromechanical emissions grounding device for ultra high speed processors

The present invention provides an adapter for utilizing a PCMCIA card in a desktop computer which has at least one card slot and one bay. The adapter includes a logic card configured to be inserted into the card slot of the computer. The logic card has logic thereon to convert PCMCIA bus architecture of the PCMCIA card to the bus architecture of the desktop computer in a bidirectional manner. There may be at least one PCMCIA card receiving slot on the logic card connected to the logic. A first set of external connectors on the logic card is connected to one end of a multi-conductor flexible cable. An outrigger card which includes at least one PCMCIA card is provided which is configured to be inserted into an externally accessible bay of the computer. A second set of connectors on the outrigger card is connected to the opposite end of the multi-conductor flexible cable. Conductors on the outrigger card connect the second set of connectors on the outrigger card to the PCMCIA card receiving slot(s) thereon. Capacitors are connected between at least some of the conductors and a plane maintained at a predetermined voltage on the outrigger card in order to reduce the distortion of the signals received from the flexible conductor at the outrigger card.

Method and apparatus for providing a remotely located outrigger card

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Cary, NC, United States of America

Daniel Joseph Hunt