Browse Prior Art Database

Thermal Enhancement of Memory Cassettes

IP.com Disclosure Number: IPCOM000036868D
Original Publication Date: 1989-Nov-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Davis, T: AUTHOR

Abstract

Memory cassettes or smart cards provide versatility to many different types of machines. They are used by the typewriter industry for font definition and computer industry for data storage. Fig. 1 illustrates how the cassettes are inserted and used by the different machines. Present cassette technology is limited to the use of static memory (SRAM). Thermal management is the key factor in the limitation of using only SRAM chips on the cassettes.

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Thermal Enhancement of Memory Cassettes

Memory cassettes or smart cards provide versatility to many different types of machines. They are used by the typewriter industry for font definition and computer industry for data storage. Fig. 1 illustrates how the cassettes are inserted and used by the different machines. Present cassette technology is limited to the use of static memory (SRAM). Thermal management is the key factor in the limitation of using only SRAM chips on the cassettes.

This article describes a technique to expand the present cassette market by allowing dynamic memory (DRAM) systems to be used. The memory cassette should be filled with a thermally conductive/electrically insulating material. Metallic covers should be used to enclose the cassette. During insertion of the cassette into the machine, a metal contact would touch the cassette's case to ground any static electricity to the machine's chassis.

The thermally conductive/electrically insulating material under

(Image Omitted)

the covers of the cassette would protect the cassette's components during the static electric discharge. Also, the material would conduct the heat of the components to the metallic covers of the cassette.

The contacts in the system would provide a thermal path from the cassette's covers to the heat exchangers. Fig. 2 illustrates the system in detail. The shape of the contact system could be made in a traditional plate-fin heat exchanger as shown in the figure.

The detailed...