Browse Prior Art Database

Effective Reliability Improvement for IC Sockets

IP.com Disclosure Number: IPCOM000102855D
Original Publication Date: 1990-Mar-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 42K

Publishing Venue

IBM

Related People

Davis, TL: AUTHOR

Abstract

The industry's standard socket design utilizes a cantilever beam contact structure. The most popular contact is a four-beam system. This standard system achieves a four-point redundant contact. To obtain improved reliability figures, the industry places two more springs in the system. This increases the cost of the system, and requires each spring to decrease in size. This size reduction results in a lower normal force exerted on the pin's surface, which may not create a gas-tight seal.

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Effective Reliability Improvement for IC Sockets

      The industry's standard socket design utilizes a cantilever
beam contact structure.  The most popular contact is a four-beam
system.  This standard system achieves a four-point redundant
contact.  To obtain improved reliability figures, the industry places
two more springs in the system.  This increases the cost of the
system, and requires each spring to decrease in size.  This size
reduction results in a lower normal force exerted on the pin's
surface, which may not create a gas-tight seal.

      This invention documents a novel contact design to achieve the
desired redundant contacts without degrading the contact's mechanical
properties.  Also, the cost of this design should be less than
employing the traditional six-point system.

      The new contact being disclosed is shown in Figure 1. In
essence, each four-point contact is split in half.  This doubles the
redundancy from four to eight.  With the old contact, corrosion on
one half of the contact spring would have affected the entire one
quarter of the contact system. However, the disclosed design would
allow the contacts to perform more or less independently.  Also, the
disclosed design should not affect the mechanical properties of the
contact since most of the stresses are isolated near the top of the
contact at the circular ban.

      Disclosed anonymously.