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Heat Sink

Semiconductor devices such as power transistors and optoelectronics such as lasers and light emitting diodes (LEDs), where the heat dissipation ability of the basic device is insufficient to moderate its temperature. A heat sink is designed to maximize its surface area in contact with the cooling medium surrounding it, such as the air. Air velocity, choice of material, protrusion design and surface treatment are factors that affect the performance of a heat sink.
MoCu and WCu materials (molybdenum copper & tungsten copper composites) are widely used in heat sinks because of their good Thermal Conductivity and Coefficient of Thermal Expansion, the price is lower than GaN and SiN heat sinks.

  • Tungsten copper heat sink
  • Heat sink

Properties for heat sink by copper molybdenum and copper tungsten.

Composites of heat sink W88Cu W85Cu W80Cu Mo90Cu Mo88Cu Mo85Cu Mo20Cu
Coefficient of Thermal Expansion (10-6/K) 5.57 5.7 6.76 5.60 5.75 5.95 6.98
Thermal Conductivity (W/m·K) 188 196 220 160 170 187 215
Heat sink size 2”,4” diameter x Thickness, with gold and other coatings

Besides MoCu and WCu heat sinks, we can also provide pure molybdenum, Cu-Mo-Cu, Cu-MoCu-Cu parts

Cu-Mo-Cu Heat Sinks Specification:

Cu: Mo: Cu (Thick ratio) Density (g/cc) Coefficient of Thermal Expansion (10-6/K) Thermal Conductivity (W/m·K), x-y direction Thermal Conductivity (W/m·K), x-z direction
1:1:1 9.4 9.4 300~310 240~250
1:2:1 9.6 7.7 260~270 210~220
1:3:1 9.7 6.9 230~240 190~200
1:4:1 9.8 6.2 210~220 170~180
13:74:13 9.9 5.8 190~200 160~170

Cu-Mo70Cu-Cu Heat Sinks Specification:

(Thick ratio)
Density (g/cc) Coefficient of Thermal Expansion (10-6/K) Thermal Conductivity (W/m·K)
Plate direction Thick direction Plate direction Thick direction
1:4:1 9.46 7.2 9.0 250-300 210-250

ETI provides complete service for copper tungsten, copper molybdenum, pure molybdenum, Cu-Mo-Cu and Cu-Mo70Cu-Cu heat sinks. Send your request to sales@edge-techind.com.

Related Tungsten composites products

Tungsten Copper

Tungsten Carbide Copper

Tungsten Silver

Electrical Contacts

Molybdenum Copper

Edgetech Industries LLC1301 SW 80th Terrace, Plantation, FL 33324 USAsales@edge-techind.com