Surface-mount, solder-down sockets permit electronic components such as semiconductor packages to be releasably mounted to a circuit board. Resilient contact structures extend from a top surface of a support substrate, and solder-ball (or other suitable) contact structures are disposed...http://www.google.fr/patents/US5772451?utm_source=gb-gplus-shareBrevet US5772451 - Sockets for electronic components and methods of connecting to electronic components
Sockets for electronic components and methods of connecting to electronic ...