Browse Prior Art Database

Integrated Cables

IP.com Disclosure Number: IPCOM000106894D
Original Publication Date: 1992-Jan-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 3 page(s) / 72K

Publishing Venue

IBM

Related People

Lueck, PJ: AUTHOR [+2]

Abstract

To eliminate plugged or soldered cable connections from printed circuits, such connections are integrated in the rigid circuit portion.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 57% of the total text.

Integrated Cables

       To eliminate plugged or soldered cable connections from
printed circuits, such connections are integrated in the rigid
circuit portion.

      For this purpose, as will be described below, parts of such
circuits are built into the flexible portion and designed to be
rigid- flex-rigid.  This allows two circuit cards to be connected in
a single step and the individual circuit components to be produced in
parallel.

      The following requirements are essential:
      o    A split power/signal plane design
      o    A flexible connection structure
           -    signal plane
           -    dielectric
           -    signal plane
      o    Power or voltage planes for the card portion

      An impregnated polyimide foil, laminated with a Cu layer (1/2
or 1 oz.) on either side, is photolithographically provided with the
conductor image of the cable connection.  This conductor image
includes eyelets for copper plating (Fig. 1).  The resultant
semifinished product is laminated on either side with another
(dielectric) layer and a copper foil.

      Then, the separate power/voltage/signal plane is produced from
the reference ground plane of the cable connection.  Any combinations
are conceivable.  Compared to unreferenced cables with active/quiet/
active conductors, the outer ground plane of the cable element allows
a close conductor spacing.  The integrated card...