Room temperature curable zirconium silicate dielectric ink for electronic applications

Abstract

A facile formulation of room temperature curable and screen printable zirconium silicate (ZrSiO4) ink has been developed. The ZrSiO4 ink printed on the flexible BoPET (biaxially-oriented polyethylene terephthalate) substrate showed a surface roughness of B160 nm for a printed layer thickness of 25 mm.The screen printed ZrSiO4 layer on the BoPET substrate has a relative permittivity of 3.01 and a dielectric loss of 0.0058 at 10 GHz. It showed a temperature coefficient of relative permittivity of 55 ppm per 1C in the temperature range of 25–60 1C at 15 GHz. The room temperature curability, low dielectric loss, low relative permittivity, mechanical and temperature stability of microwave dielectric properties of theprinted ZrSiO4 layer make it suitable for printed microwave applications.