Room temperature curable zirconium silicate dielectric ink for electronic applications

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 similar to 160 nm for a printed layer thickness of 25 mu m. 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 degrees C in the temperature range of 25-60 degrees C at 15 GHz. The room temperature curability, low dielectric loss, low relative permittivity, mechanical and temperature stability of microwave dielectric properties of the printed ZrSiO4 layer make it suitable for printed microwave applications.