Updated October 20, 2006

Quartz is the ultimate low-loss substrate; there's two reasons for this. It has exceptionally low dielectric loss tangent, and it also has low dielectric constant which means relatively fat RF lines. It has a very low thermal expansion coefficient which can limit its use.

Some of the data was taken from an old MIC technology databook.

We wish we could find another reference on this material!

Formula or Composition:	SiO2
Dielectric Constant ():	3.8
Dissipation Factor (a.k.a. loss tangent, or tan):	.0001
Temperature Coefficient of :	ppm/°C
Bulk Resistivity:	-cm
Temperature Coefficient of Resistivity (TCR):	ppm/°C
Mass Density:	2.65 gr/cc
Specific Heat:	J/g/°C
Thermal Conductivity (k):	5 W/m°C
Temperature Coefficient of Expansion (TCE):	0.6 ppm/°C
Melting Point	°C °F