RF filter having composite dielectric layer and method of manufacture

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United States of America Patent

PATENT NO 5382928
SERIAL NO

08008277

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A distributed element filter member (10) comprises a semi-conductor member (12) having a composite dielectric layer (24) disposed on and secured to a first major surface (16) of the member (12), the layer (24) being comprised of a polymerized dielectric material made of either barium titanate or strontium titanate particles in various ranges of mixture; a conductive layer (34) is disposed on portions of the dielectric layer defining an outer ground conductor and an inner conductive layer (36) is disposed on a second major surface of the semi-conductor member defining a signal conductor. The polymer utilized may be selected from an aqueous solution containing acrylic styrene as a copolymer or a solid polyester dissolved in carbitol acetate, or a solid bisphenol A-based epoxy resin dissolved in butyl carbitol acetate with various mixtures of barium or strontium titanate utilized. A filter (12') embodiment includes three layers of polymerized material.

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Patent Owner(s)

  • SPECTRUM CONTROL,INC.

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Davis, Thomas F Camp Hill, PA 9 195
Iannella, James F Harrisburg, PA 4 90

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