Circuit materials with improved bond, method of manufacture thereof, and articles formed therefrom
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United States of America Patent
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Sep 4, 2012
Grant Date -
Jul 30, 2009
app pub date -
Feb 13, 2009
filing date -
Aug 8, 2006
priority date (Note) -
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Abstract
A circuit subassembly, comprising: a conductive layer, a dielectric layer formed from a thermosetting composition, wherein the thermosetting composition comprises, based on the total weight of the thermosetting composition a polybutadiene or polyisoprene resin, about 30 to about 70 percent by weight of a magnesium hydroxide having less than about 1000 ppm of ionic contaminants, and about 5 to about 15 percent by weight of a nitrogen-containing compound, wherein the nitrogen-containing compound comprises at least about 15 weight percent of nitrogen; and an adhesive layer disposed between and in intimate contact with the conductive layer and the dielectric layer, wherein the adhesive comprises a poly(arylene ether), wherein the circuit subassembly has a UL-94 rating of at least V-1.
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