Browse Prior Art Database

Daughter Card Shipping Restraint

IP.com Disclosure Number: IPCOM000106941D
Original Publication Date: 1992-Jan-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Parks, HM: AUTHOR

Abstract

In recent development and released computer products, considerable number of shipping problems have been experienced when daughter (riser) cards and memory boards have totally or partially become disconnected from the mother board. Most often this separation cannot be readily detected visually but will cause hard failures resulting in customer dissatisfaction and service calls.

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This is the abbreviated version, containing approximately 100% of the total text.

Daughter Card Shipping Restraint

       In recent development and released computer products,
considerable number of shipping problems have been experienced when
daughter (riser) cards and memory boards have totally or partially
become disconnected from the mother board.  Most often this
separation cannot be readily detected visually but will cause hard
failures resulting in customer dissatisfaction and service calls.

      In the case of earlier recently announced products, it is not
always feasible to provide "overhead hold downs" as part of the frame
or covers to prevent card separation from their connectors.  Most
connections of this kind are card edge tabs on the daughter card and
MICRO CHANNEL* type connectors on the mother board.

      This article offers a solution to this type of connection which
would differ slightly for riser cards and for memory cards.  The
disclosed restraint is a small, inexpensive molded plastic part which
locks the card to the planar or mother board eliminating any chance
of partial or total separation.  (See Figure 1 for riser card type
restraint, and Figure 2 for memory and other similar card
restraints.)

      Figure 1 restraint 3 ties the planar connector 1 to the riser
card 2 with latching surfaces 4 and 5.
*  Trademark of IBM Corp.