7070 glass for MEMS and anodic bonding

Corning 7070 Optical Glass

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





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