Kovar (shown in Blue)

Properties of Copper

Thermal Expansion of Copper

Thermal expansion of Molybdenum TE=4.535 x 10-6 per deg C at 400 C

Glass used with Kovar Code 7070

Comparison of Filler Materials Sn – Ag Solder Shear Strength= 2,700 psi Tensile Strength= 5,800 psi Expansion 30 PPM/oC Liquidus 430 oF Georo Au - Ge Braze Shear Strength= 26,825 psi Tensile Strength= 26,835 psi Young’s Modulus =10.55 x 106 psi Expansion 13 PPM/oC Liquidus 673 oF Sn – Cu - Ag Solder Shear Strength= 5,874 psi Liquidus 423 oF

Wesco Metals

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