CVD Diamond for Thermal management applications
　

AWIN Diamond offers the wide range of Diamond heat spreaders, manufactured by Element Six. Element Six is the world's leading developer and producer of technical solutions with diamond. Diamond products from Element Six use the unique properties of both synthetic and natural diamond. Our solutions exceed our customers' expectations in optical, thermal, cutting and electronic applications. Element Six is continually discovering applications and areas where diamond fulfils customers' requirements far better than any other material. Diamond, with its unique combination of properties is an excellent material for various thermal management applications. Element Six announces the availability of a range of Diafilm TM grades of Chemical Vapour Deposition (CVD) diamond, suitable for thermal management applications where diamond’s exceptional thermal diffusivity and conductivity is required.

All products in the Diafilm TM series (TM 100, TM 150, TM 180) have engineered properties which make them the material of choice in many thermal management applications. The success of Diafilm TM is based on its superior heat spreading capabilities. As well as dissipating heat, CVD diamond can be prepared with high precision edges and can be metallised. Typical application areas include submounts for laser diodes for the telecommunications industry, high power discrete diodes, laser diode arrays, high power RF transistors and high power VCSELs.

　

Property	Diafilm TM 100	Diafilm TM 150	Diafilm TM 180
Thermal conductivity @300K (W/mK) @425K (W/mK)	> 1000 > 900	> 1500 > 1400	> 1800 > 1500
Thermal expansion coefficient @300K (ppm/K) @10000K (ppm/K)	1.0 ± 0.1 4.4 ± 0.1	1.0 ± 0.1 4.4 ± 0.1	1.0 ± 0.1 4.4 ± 0.1
Thermal diffusivity @300K (cm2/s)	> 5.5	> 8.3	> 10.0
Specific heat capacity @300K (J/kgK)	520	520	520
Vickers hardeness @300K (kg/mm2)	8000 - 1900	8000 - 1900	8000 - 1900
Fracture toughness (MPam0.5)	5.3 - 7.0	5.3 - 7.0	5.3 - 7.0
Young's modulus (GPa)	1000 - 1100	1000 - 1100	1000 - 1100
Poisson's ratio	0.1	0.1	0.1
Density (103 kg/m3)	3.52	3.52 3.52

Supply of CVD Diamond (CVDD) Heat Spreaders

• Tc >1000, > 1500 and >1800 W/mK, Standard thickness 0.25mm, 0.30mm and 0.40
  mm, thickness tolerance ± 25μm standard, ± 10μm upon request.
• Supply of assembled (AlN - CVDD) parts using high quality soler joints (AuGe or
  AuSn) or thermal compression bonding.
• High edge quality, chip-outs; <25μm standard, <10μm on demand, metallisation of
  critical area to-the-edge.
• Surface finish: highly polished surfaces available (Ra < 50 nm).
• Full face Ti/Pt/Au sputter deposited metal layers.
• Full face eutectic AuSn (Tm = 279°C) solder layers.
• Ti/Pt/Au sputter deposited metal patterns.
• Wrap around coatings.
• Solder pads with eutectic AuSn (Tm = 279°C).
• Very tight flatness specification available upon request.

In this section

Composite Diamond Heat Spreaders

AlN Heat Spreaders

Thermal Material Properties

ADC