Molybdenum-Copper Heat Sinks

copper moly heat sinks

They are composites of molybdenum and copper. Similar to W-Cu, CTE of Mo-Cu can also be tailored by adjusting the content of molybdenum. Mo-Cu is much lighter than W-Cu so that it is suitable for aeronautic and astronautic applications.

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 for Using Molybdenum Copper Heat Sinks

  • High thermal conductivity since no sintering additives have been used
  • Excellent hermeticity
  • Relatively small density
  • Stampable sheets available (Mo content no more than 75 wt%)
  • Semi-finished or finished (Ni/Au plated) parts available

MoCu Technical Data

Physical Properties
Mo85Cu15
Mo80Cu20
Mo70Cu30
Mo60Cu40
Mo50Cu50
Composition
(wt% Mo Cu: balance)
 85% 80% 70% 60% 50%
Density at 20ˇăC
(g/cm3)
10.0 9.9 9.8 9.6 9.5
CTE at 20ˇăC
(10-6/K)
6.8 7.2 9.1 10.3 11.5
Thermal Conductivity
(W/mK)
165 175 195 215 250
Specific Heat at 100ˇăC
(J/kgK)
 275 - 301 310 323
Electrical Conductivity at 20ˇăC
(MS/m)
18.5 19.8 22.3 24.8 27.3
Young's Modulus at 20ˇăC
(Gpa)
 248 241 225 - 172
Flexural Strength
(MPa)
 1,138 1,103 - - -
VickerˇŻs Hardness
(HV 10)
 - - 170 - 150