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9330results about "Fixed connections" patented technology

Resilient contact structures formed and then attached to a substrate

Contact structures exhibiting resilience or compliance for a variety of electronic components are formed by bonding a free end of a wire to a substrate, configuring the wire into a wire stem having a springable shape, severing the wire stem, and overcoating the wire stem with at least one layer of a material chosen primarily for its structural (resiliency, compliance) characteristics. A variety of techniques for configuring, severing, and overcoating the wire stem are disclosed. In an exemplary embodiment, a free end of a wire stem is bonded to a contact area on a substrate, the wire stem is configured to have a springable shape, the wire stem is severed to be free-standing by an electrical discharge, and the free-standing wire stem is overcoated by plating. A variety of materials for the wire stem (which serves as a falsework) and for the overcoat (which serves as a superstructure over the falsework) are disclosed. Various techniques are described for mounting the contact structures to a variety of electronic components (e.g., semiconductor wafers and dies, semiconductor packages, interposers, interconnect substrates, etc.), and various process sequences are described. The resilient contact structures described herein are ideal for making a "temporary" (probe) connections to an electronic component such as a semiconductor die, for burn-in and functional testing. The self-same resilient contact structures can be used for subsequent permanent mounting of the electronic component, such as by soldering to a printed circuit board (PCB). An irregular topography can be created on or imparted to the tip of the contact structure to enhance its ability to interconnect resiliently with another electronic component. Among the numerous advantages of the present invention is the great facility with which the tips of a plurality of contact structures can be made to be coplanar with one another. Other techniques and embodiments, such as wherein the falsework wirestem protrudes beyond an end of the superstructure, or is melted down, and wherein multiple free-standing resilient contact structures can be fabricated from loops, are described.
Owner:FORMFACTOR INC

Probe card assembly and kit, and methods of using same

A probe card assembly includes a probe card, a space transformer having resilient contact structures (probe elements) mounted directly thereto (i.e., without the need for additional connecting wires or the like) and extending from terminals on a surface thereof, and an interposer disposed between the space transformer and the probe card. The space transformer and interposer are "stacked up" so that the orientation of the space transformer, hence the orientation of the tips of the probe elements, can be adjusted without changing the orientation of the probe card. Suitable mechanisms for adjusting the orientation of the space transformer, and for determining what adjustments to make, are disclosed. The interposer has resilient contact structures extending from both the top and bottom surfaces thereof, and ensures that electrical connections are maintained between the space transformer and the probe card throughout the space transformer's range of adjustment, by virtue of the interposer's inherent compliance. Multiple die sites on a semiconductor wafer are readily probed using the disclosed techniques, and the probe elements can be arranged to optimize probing of an entire wafer. Composite interconnection elements having a relatively soft core overcoated by a relatively hard shell, as the resilient contact structures are described.
Owner:FORMFACTOR INC

Guide rail and CAM system with integrated connector for removable transceiver

An electrical connector includes a body and two or more electrical contacts. The body has a guide member that is elongated between a first end and a second end along a first axis and has a connector block at the first end. The connector has a very low profile (preferably, less than about 10 mm high), and the bottom of the body is surface-mountable on a circuit board. The height of the connector can be defined by a vertical axis perpendicular to the first axis. The connector block retains the contacts, which are spaced from one another in the direction of the first axis. The body also has a camming element that, in response to a force of a mating connector being moved along the first axis, brings the contacts of the connector and mating connector together in a generally vertical direction. The camming element may have two oppositely inclined ramp sections. When a mating connector having complementary contacts is, guided by the guide member, moved into engagement with the camming element, the first ramp lifts the mating connector, including its contacts, above the connector block, and the second ramp lowers the mating connector onto the connector block, with the contacts of the mating connector lowering onto and making contact with the contacts of the electrical connector. The camming motion minimizes wiping between the mating contacts and largely confines the relative motion of the contacts to a vertical direction. The contacts may be arrayed in two or more rows.
Owner:LUMENTUM OPERATIONS LLC
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