Importance

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Abstract

A double-sided circuit card assembly comprises first and second printed wiring boards having first and second sets of electrical contacts mounted thereon, and a signal cross-over interconnect member interposed between the first and second printed wiring boards and bonded thereto so as to form therewith a three-component laminate. The cross-over interconnect member comprises a metal frame member having a slot defined therethrough, and a flex circuit member, having a third set of electrical contacts mounted thereon, is passed through the slot and bent around an internal edge portion of the frame member so as to electrically interconnect the first and second sets of electrical contacts of the first and second printed wiring boards. In this manner, the number of interconnection sites is enhanced, the fabrication of the electrical connections is facilitated, and the flex circuit member is disposed internally of the laminate structure so as not to be exposed to external environmental factors. The frame member also provides the requisite support for the flex circuit, and serves as a heat sink for dissipating heat generated by means of the first and second printed wiring boards.

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First Claim