Tungsten Copper Heat Seat

Tungsten Copper Heat Seat Picture

Tungsten copper heat seat is used extensively in thermal mounting plates, chip carriers, flanges, and frames for high-powered electronic devices. As a copper tungsten composite, it utilizes the thermal advantages of copper and the very low expansion characteristics of tungsten.

The combination of these two materials results in thermal expansion characteristics similar to those of silicone carbide, aluminum oxide, and beryllium oxide, used as chips and substrates. Because of CuW's thermal conductivity and expansion characteristics, it works well in densely packed circuits.

Features of CuW include:
Minimizes thermal stress
Can be mounted to directly
Can be plated with silver, gold, nickel, and copper
Readily brazable without distortion or loss of physical properties
Maintains high physical properties over a wide range of temperatures
Remains stable during temperature cycling
High electrical conductivity, varying with the grade
Superior thermal conductivity
Various grades are available to match the characteristics and requirements of the material attached to it
Can be readily machined into complicated shapes
Parts can often be made to net or near net shape, because they are manufactured by powder metallurgy

Thermal Expansion

tungsten copper

Thermal Conductivity

tungsten copper

Related dates:

Type Composition Properties
  element Content wt% Density CTE ppm/K TC,

Mass density, g/cm3 Relative density, %T.D
W90Cu W
17.0 ≥99 5.6~6.5 180~190
W85Cu W
16.3 ≥99 6.3~7.0 190~200
W80Cu W
15.4 ≥99 7.6~9.1 200~220