WCu / MoCu / CMC / CPC Heat Sink Materials For Electronic Packaging
Description:
CuW heat sink material is a composite of tungsten and copper, with
both tungsten low expansion characteristics, but also has copper of
high thermal conductivity properties, and the tungsten and copper
in the thermal expansion coefficient and thermal conductivity can
be adjusted with the W-Cu composition, also the composite can be
machined to various shape.
CuMo composite is similar with Tungsten-Copper composite, its
thermal expansion coefficient and thermal conductivity can be
adjusted to match many different materials, it has lower density,
but its CTE is higher than W-Cu.
CMC or CPC is a sandwich composite, CMC including a molybdenum core
layer and two copper clad layers, CPC including a Mo-Cu alloy core
layer and two copper clad layers . They have different CTE in X and
γ direction, with higher thermal conductivity than that of W
(Mo)-Cu.
Advantages:
1. High thermal conductivity
2. Excellent hermeticity
3. Excellent flatness, surface finish, and size control
4. Semi-finished or finished (Ni/Au plated) products available
5. Low void
Product Properties:
| Grade | W Content | Density g/cm3 | Coefficient of thermal Expansion ×10-6 (20℃) | Thermal conductivity W/(M·K) |
| 90WCu | 90±2% | 17.0 | 6.5 | 180 (25℃) /176 (100℃) |
| 85WCu | 85±2% | 16.4 | 7.2 | 190 (25℃) / 183 (100℃) |
| 80WCu | 80±2% | 15.65 | 8.3 | 200 (25℃) / 197 (100℃) |
| 75WCu | 75±2% | 14.9 | 9.0 | 230 (25℃) / 220 (100℃) |
| 50WCu | 50±2% | 12.2 | 12.5 | 340 (25℃) / 310 (100℃) |
| Grade | Mo Content | Density g/cm3 | Coefficient of thermal Expansion ×10-6 (20℃) | Thermal conductivity W/(M·K) |
| 85MoCu | 85±2% | 10.0 | 7 | 160(25℃)/156(100℃) |
| 70MoCu | 70±2% | 9.8 | 7 | 200(25℃)/196(100℃) |
| 60MoCu | 60±2% | 9.66 | 7.5 | 222(25℃)/217(100℃) |
| 50MoCu | 50±2% | 9.5 | 10.2 | 250(25℃)/220(100℃) |
| Grade | Density g/cm3 | Coefficient of thermal Expansion ×10-6 (20℃) | Coefficient of thermal Expansion ×10-6 (20℃) |
| CPC141 | 9.5 | 7.3 | 280(XY)/170(Z) |
| CPC232 | 9.3 | 10.2 | 255(XY)/250(Z) |
Application:
These composite are widely used in applications such as
Optoelectronics Packages, Microwave Packages, C Packages, Laser
Sub-mounts, etc.
Product picture:
