Browse Prior Art Database

Re usable Interconnection Matrix

IP.com Disclosure Number: IPCOM000091922D
Original Publication Date: 1968-Jul-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Harlow, LA: AUTHOR

Abstract

Printed circuit board 10 is provided on one or both sides with a matrix of intersecting copper lines 12. The lines are not continuous but are interrupted at intervals by fine channels 14, etched completely through their cross-section. At the intersections, a central island is thus completely separated from all lines leading to it by these narrow channels.

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Re usable Interconnection Matrix

Printed circuit board 10 is provided on one or both sides with a matrix of intersecting copper lines 12. The lines are not continuous but are interrupted at intervals by fine channels 14, etched completely through their cross-section. At the intersections, a central island is thus completely separated from all lines leading to it by these narrow channels.

After etching, the entire pattern is coated by wave soldering, followed by a wave of hot flux to eliminate all bridging of the channels. Then, any remaining flux is removed by solvent cleaning. Next, if a hot soldering iron is drawn along a line, and providing no flux is present, the channels easily bridge and remain so, creating a conducting path whenever the iron is drawn. To rework, flux is applied to the area to be repaired. Touching a segment with a hot iron releases all bridging associated with that particular solder path.

The matrix can be interconnected to electronic circuitry on the reverse side by the use of plated through-holes, or to circuitry at the edges without plated through-holes, or both. Thus, the equivalent of jumper wires is easily formed and changed if a new pattern is desired. The matrix can be rectangular, as in drawing 1, or have other configurations as, for example, in drawing 2. Miniaturization is realized to at least a .050 Inch rectangular mesh having .004 inch channels.

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