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Dielectric Properties of Liquid Crystalline Polymers and CaTiO3-LaAlO3 Composites for Embedded Matching Capacitors
Keywords: LCP, Composite, TCC
We manufactured Liquid Crystal Polymer (LCP) and (1-x)CaTiO3-xLaAlO3 (CT-LA) ceramic composites and investigated dielectric properties to use as embedded capacitor in printed circuit boards and replace LTCC substrate. The dielectric properties of these composites are varied with volume fraction of CT-LA and ratios of CT/LA. Dielectric constants are in the range of 3~15. In addition, we could get low TCC and high Q value that could not achieve in other ceramic-polymer composites. Especially, in composite with x=0.01 and 30 vol% CT-LA, the dielectric constant and Q-value are 10 and 200, respectively. And more TCC is -28~+300ppm/ in the temperature range of -55~125. We think that this composite can be used high-Q substrate material like LTCC and embedded temperature compensation capacitor in printed circuit boards.
Jin Cheol Kim, R&D Engineer
Samsung Electro-Mechanics
Suwon, Gyunggi-Do 443-743,
Korea


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