Browse Prior Art Database

Lead Frame Fabrication for High Density Contractors

IP.com Disclosure Number: IPCOM000079038D
Original Publication Date: 1973-Apr-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Nurczynski, AW: AUTHOR [+2]

Abstract

This is a technique for fabricating a lead frame for contactors to produce cantilever beams.

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Lead Frame Fabrication for High Density Contractors

This is a technique for fabricating a lead frame for contactors to produce cantilever beams.

In the fabrication of a circular lead frame as shown in Fig. 1, previously known techniques etched out the shape as shown. This failed to produce the parts according to rigid specifications, and after fixing the beams, probes were found to be out of alignment. This was due to the fact that the beams are very thin and tend to move out of place during lamination. Also, the shape of the beam near the tip was found to be as shown in Fig. 2.

By the present technique, lead frames are etched to a shape shown in Fig. 3, leaving the solid ring at the center intact. The solid ring at the center is punched after the lamination process is completed, thereby eliminating the misalignment problem. Moreover, the shape of the beam at the punched edge is not dependent on the etching process, thereby producing straight cross-section edges as illustrated in Fig. 4.

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