Patent ID: 7083428

Claim:
A hybrid apparatus for interfacing between a device tester and a packaged integrated circuit (IC), the apparatus comprising: a fixed base including: a printed circuit board having an upper surface and including a plurality of contact pads formed on the upper surface, and a contact-locking structure mounted over the printed circuit board; a nesting member mounted over the fixed base such that the nesting member is movable toward the fixed base, the nesting member including a substrate disposed substantially parallel to the contact-locking structure and having an upper surface facing away from the fixed base, the upper surface including a test area defining a plurality of through-holes extending from the upper surface to a lower surface of the substrate, a plurality of spring-type contact members mounted to the contact-locking structure, each contact member being positioned such that a first end of said each contact member contacts a corresponding contact pad of the plurality of contact pads formed on the printed circuit board, and a second end of each contact member extends into a corresponding through-hole of the plurality of through-holes formed in the substrate of the nesting member; wherein a first contact member comprises a relatively low-inductance contact member to facilitate high-speed communication between the packaged IC and the printed circuit board when the packaged IC is mounted on the nesting member, and wherein a second contact member comprises a relatively high-inductance contact member to facilitate low-speed communication between the packaged IC and the printed circuit board when the packaged IC is mounted on the nesting member.