University of Massachusetts

Raytheon Company

Mahdi Haghzadeh

Edward D Kingsley

Alkim Akyurtlu

Craig A Armiento

Mary K Herndon

Joey L Mead

Carol M F Barry

Artee Panwar

Oshadha K Ranasingha

Andrew M Luce

Guinevere M Strack

Cameron Hardie

Flexible substrates including a polymer selected from a thermoplastic polymer, a thermoset polymer, and/or a polymer blend, and ferroelectric perovskite-type oxide particles dispersed in the polymer, where the ferroelectric perovskite-type oxide has a dielectric constant that varies with applied voltage. The flexible substrates can be used in tunable electronics.

Flexible functionalized ceramic-polymer based substrates

A novel ferroelectric ink comprising multiphase Barium Strontium Titanate (BST) in a polymer composite is described. The ink can be employed using direct-ink writing techniques to print high dielectric constant, low loss, and electrostatically-tunable dielectrics on substrates. The substrates can be flexible such as plastics or rigid, such as substrates comprising semiconductor materials or ceramics and the like. The dielectric ink is made by suspending pre-sintered nano/submicron-sized particles of BST in a thermoplastic polymer with a solvent. After printing with the ink, a low temperature curing process is performed at temperatures below 200&#xb0; C., a temperature too low to sinter BST. Fully printed devices, such as a varactor and a phase shifter using direct ink writing methodologies are described.

Ferroelectric nanocomposite based dielectric inks for reconfigurable RF and microwave applications

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Lowell, MA, United States of America

Mahdi Haghzadeh