INSULATING MATERIAL USING EPOXY RESIN COMPOSITION
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United States of America Patent
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Issued Date -
Oct 23, 2014
app pub date -
Nov 22, 2012
filing date -
Nov 29, 2011
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Abstract
An insulating material obtained by using an epoxy resin composition comprising, as an epoxy resin curing agent, a polycondensation-type aryloxysilane compound contained in an amount of 50 to 100 wt %, having a hydroxyl group equivalent in a range of 1,000 to 8,000 g/eq, and an epoxy resin having an epoxy equivalent of 200 to 500, wherein a thermally cured product obtained by curing this epoxy resin composition at a temperature of 180° C. or lower, shows a dielectric constant and a dielectric loss tangent of 3.00 or smaller and 0.015 or smaller, respectively, at 1 GHz under normal temperature. The insulating material using the epoxy resin composition can exhibit both excellent dielectric properties and practical characteristics, and is suitable for an interlayer insulating material of a multilayer printed circuit board.
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