Tungsten-Copper Heat Sinks

tungsten copper heat sinksThey are composites of tungsten and copper. By adjusting the content of tungsten, we can have its coefficient of thermal expansion (CTE) designed to match those of materials such as ceramics (Al2O3, BeO), semiconductors (Si), and metals (Kovar), etc.

Our products are widely used in applications such as optoelectronics packages, Microwave Packages, C Packages, Laser Submounts, etc. Here is what our customers say about us!

Advantages

  • High thermal conductivity
  • Excellent hermeticity
  • Excellent flatness, surface finish, and size control
  • Semi-finished or finished (Ni/Au plated) products available

NEW - Copper Tungsten Heat Sinks Off The Shelf - click here

Copper Tungsten is one of the most popular refractory metal based heat sink materials offered today. With the new off-the-shelf system, we are able to offer standard products with a short lead-time at extremely competitive rates.

For product and pricing information, please click here.


Physical and Mechanical Properties

Material W90Cu10 W88Cu12 W85Cu15 W80Cu20 W75Cu25
Tungsten Content (wt%) 90 1 88 1 85 1 80 1 75 1
Density at 20C (g/cm3) 17.0 16.8 16.3 15.6 14.9
Coefficient of thermal expansion at 20C (10-6/K) 6.5 6.7 7.0 8.3 9.0
Thermal conductivity at 25C/100C (W/mK) 180 - 190 185 - 195 190 - 200 200 - 210 220 - 230
Specific heat at 100C(J/kgK) 160 168 174 195 211
Specific electrical resistance at 20C (̦m) 0.045 0.043 0.04 0.034 0.029
Young's modulus at 20C(Gpa) 330 320 310 280 256
Vickers hardness (HV 10) 300 290 280 260 240