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ENCLOSURE FOR MULTIPLE 'PCMCIA FORM FACTOR' CARDS

IP.com Disclosure Number: IPCOM000009469D
Original Publication Date: 1999-Sep-01
Included in the Prior Art Database: 2002-Aug-27
Document File: 2 page(s) / 114K

Publishing Venue

Motorola

Related People

Mark Summers: AUTHOR

Abstract

This paper describes a method of obtaining bet- ter packaging for smaller electronics enclosures. This concept is based on providing a vertical orien- tation of 'PCMCIA form factor' cards into banks of multiple cards. PCMCIA originally meant Personal Computer Memory Card Industry Association. However, the form factor of these original memory cards has caught on in the industry in such a way as to include not only application variations (i.e. Modem, Ethernet, GPS, etc.) but also changes in the original PC-Card bus. These bus variants include such bus designs as CARD-BUS and Small PC1 (a.k.a. as Peripheral Component Interconnect) bus. Hence the term 'PCMCIA form factor' describes the PCMCIAiPC-CARD, CARD-BUS and Small PC1 cards and associated ejectors.

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Technical MOIVROLA @ Developments

 ENCLOSURE FOR MULTIPLE 'PCMCIA FORM FACTOR' CARDS

by Mark Summers

ABSTRACT

  This paper describes a method of obtaining bet- ter packaging for smaller electronics enclosures. This concept is based on providing a vertical orien- tation of 'PCMCIA form factor' cards into banks of multiple cards. PCMCIA originally meant Personal Computer Memory Card Industry Association. However, the form factor of these original memory cards has caught on in the industry in such a way as to include not only application variations (i.e. Modem, Ethernet, GPS, etc.) but also changes in the original PC-Card bus. These bus variants include such bus designs as CARD-BUS and Small PC1
(a.k.a. as Peripheral Component Interconnect) bus. Hence the term 'PCMCIA form factor' describes the PCMCIAiPC-CARD, CARD-BUS and Small PC1 cards and associated ejectors.

  The concept described in this paper solves many of the space constraints associated with the present horizontal configurations of single or double 'PCM- CIA form factor' ejectors. Not only does the design allow for better electronic packaging, but the design is also more conducive to the critical parameter of SmaIl PC1 backplane reflected wave spacing.

PROBLEMS WITH TRADITIONAL 'PCMCIA FORM FACTOR' EJECTORS

  Figure 1 illustrates the traditional 'PCMCIA form factor' ejector. Presently PCMCIA/PC-CARD, CARD-BUS and Small PC1 ejectors consist of no more than two horizontal ejectors ganged together. This results in poor packaging if multiple 'PCMCIA form factor' cards are necessary for a certain system application. Furthermore the horizontal construc- tion and only two card limit, preclude using more than two Small PC1 cards on a given bus segment due to the critical reflected wave spacing on the backplane.

PROBLEMS SOLVED,BY THIS SUPPORT MECHANISM DESIGN

  Figure 2 illustrates the concept described in this paper and hi-lights the tight packaging of multiple 'PCMCIA form factor' cards. (Although Figure 2 shows a structure with 8 'PCMCIA form...