Electrically conductive article
First Claim
Patent Images
1. An electrically conductive article comprising:
- (a) at least one sheet of microporous material having generally opposing sides, said microporous material on a coating-free, printing ink-free, impregnant-free and pre-bonding basis comprising;
(1) a matrix consisting essentially of substantially water insoluble thermoplastic organic polymer,(2) finely divided substantially water-insoluble filler particles, of which at least about 50 percent by weight are siliceous particles, said filler particles being distributed throughout said matrix and constituting from about 50 to about 90 percent by weight of said microporous material,(3) a network of interconnecting pores communicating substantially throughout said microporous material, said pores constituting at least about 35 percent by volume of said microporous material; and
(b) electrically conductive coating or electrically conductive printing ink on at least a portion of at least one of said sides.
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Accused Products
Abstract
Microporous material comprising (1) a matrix consisting essentially of thermoplastic organic polymer, (2) a large proportion of finely divided water-insoluble siliceous filler, and (3) interconnecting pores is coated with electrically conductive coating and/or printed with electrically conductive printing ink. The resulting products have many uses as electrically conductive articles, including electromagnetic interference shields and printed circuit boards. Three-dimensional printed circuit boards are disclosed.
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Citations
42 Claims
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1. An electrically conductive article comprising:
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(a) at least one sheet of microporous material having generally opposing sides, said microporous material on a coating-free, printing ink-free, impregnant-free and pre-bonding basis comprising; (1) a matrix consisting essentially of substantially water insoluble thermoplastic organic polymer, (2) finely divided substantially water-insoluble filler particles, of which at least about 50 percent by weight are siliceous particles, said filler particles being distributed throughout said matrix and constituting from about 50 to about 90 percent by weight of said microporous material, (3) a network of interconnecting pores communicating substantially throughout said microporous material, said pores constituting at least about 35 percent by volume of said microporous material; and (b) electrically conductive coating or electrically conductive printing ink on at least a portion of at least one of said sides. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A printed circuit comprising:
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(a) at least one sheet of microporous material having generally opposing sides, said microporous material on a coating-free, printing ink-free, impregnant-free, and pre-bonding basis comprising; (1) a matrix consisting essentially of substantially water insoluble thermoplastic organic polymer, (2) finely divided substantially water-insoluble filler particles, of which at least about 50 percent by weight are siliceous particles, said filler particles being distributed throughout said matrix and constituting from about 50 to about 90 percent by weight of said microporous material, (3) a network of interconnecting pores communicating substantially throughout said microporous material, said pores constituting at least about 35 percent by volume of said microporous material; and (b) electrically conductive printing ink on at least a portion of at least one of said sides. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A method for producing a three-dimensional printed circuit board comprising:
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(a) printing electrically conductive printing ink upon at least one side of a sheet of microporous material having generally opposing sides, said microporous material on a coating-free, printing ink-free, impregnant-free, and pre-bonding basis comprising; (1) a matrix consisting essentially of substantially water insoluble thermoplastic organic polymer, (2) finely divided substantially water-insoluble filler particles, of which at least about 50 percent by weight are siliceous particles, said filler particles being distributed throughout said matrix and constituting from about 50 to about 90 percent by weight of said microporous material, (3) a network of interconnecting pores communicating substantially throughout said microporous material, said pores constituting at least about 35 percent by volume of said microporous material; (b) molding the printed microporous material with organic polymer to bond said printed microporous material to said organic polymer and to form said three-dimensional printed circuit board. - View Dependent Claims (39, 40, 41, 42)
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Specification