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Two Level Printed Circuit Card

IP.com Disclosure Number: IPCOM000076794D
Original Publication Date: 1972-Apr-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Truchi, A: AUTHOR

Abstract

Design changes are frequently made subsequent to the manufacture of a multilayer printed-circuit card, and these strongly affect the conductor layout of the card. Such changes usually involve a considerable amount of work and are both time-consuming and costly, since it is necessary either to remove the absolute card and to replace it with a new one, or where feasible, to modify the printed-conductor layout.

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Two Level Printed Circuit Card

Design changes are frequently made subsequent to the manufacture of a multilayer printed-circuit card, and these strongly affect the conductor layout of the card. Such changes usually involve a considerable amount of work and are both time-consuming and costly, since it is necessary either to remove the absolute card and to replace it with a new one, or where feasible, to modify the printed-conductor layout.

The suggested multilayer printed-circuit card consists of two superimposed parts.

a) A basic card 10 which carries voltage and ground planes 11 and spring contacts for external connections. This part serves as a support for mounting various components 12.

b) A thin card 13 on which layers of signal carrying conductors 14 are printed. This part is the only one that would be affected by design changes and can easily be removed and replaced.

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