Screened interconnect system
AssigneeBabcock Display Products, Inc.
InventorSang T. Tang
Life of this patent
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Abstract
An interconnect system which is used to provide an electrical connection between contact pads on the facing surfaces of adjacent electrical support media such as the face plate and the substrate of an electronic circuit device such as gas discharge displays. The interconnect system uses a conductive glass material which is selectively screened onto and fired with the display device.
Claims15
An interconnect system for electrically interconnecting electrical conductors on parallel plates comprising,
- first and second planar plates of substantially electrically non-conducting material,
- a plurality of closely spaced conductor paths on a surface of each of said first and second planar plates,
- said conductor paths are on the order of 0.5 mm wide with spacing on the order of 0.5 mm therebetween,
- said first and second planar plates arranged in parallel, spaced apart relation with the plurality of conductor paths on said first planar plate in alignment with the plurality of conductor paths on said second planar plate, and
- independent and unsupported interconnections formed of a conductive material having substantially the same thermal coefficiently of thermal expansion as said first and second planar plates and joined to the aligned conductor paths on said first and second planar plates in order to electrically interconnect said aligned conductor paths.
An interconnect system between high density conductive paths on a pair of relatively widely spaced apart glass substrates in a display device comprising,
- a plurality of independent, unsupported, and highly electrically conductive, pillars of devitrified and fired solder glass interposed between respective conductive paths on surfaces of both of said pair of glass substrates wherein said glass substrates are spaced apart by at least 0.3 mm.
A method of forming a high density electrical interconnection arrangement between a pair of parallel, planar glass plates having a plurality of closely spaced conductor paths on each of the adjacent surfaces of said plates comprising,
- screening a layer of conductive glass onto each conductor path which is to be interconnected on at least one of said pair of parallel planar plates,
- said screening step comprises a thick film process,
- drying said layer of conductive glass in a preglaze operation,
- placing said pair of plates in parallel relationship with the conductor paths of both plates aligned with each other, and
- firing said conductive glass to devitrify same.
Dependencies are inferred from the claim text.