7070 Glass for MEMS and Anodic Bonding

Principal Use(s)

Low loss electrical applications, MEMS, anodic bonding and for optical applications.

Thermal/Mechanical Properties

Density (at 207 °C/68 °F): 2.13 g/cm³ Thermal Coefficient of Expansion (0/300 °C; 32/572 °F):
32 x 10^-7/°C; 17.7 x 10 ^-7/°F
Strain Point: 456°C/ 853°F
Annealing Point: 496°C/925°F
Softening Point: NOT MEASURABLE

Optical Properties

Refractive Index (l=589,3nm): 1.469
Optical transmission

Chemical Properties

Hydrolytic resistance: class 2
Acid resistance: class 2

Electrical Properties

Dielectric Constant: E= 4