Datasheet

Rti [Kin
2
/W]
Applications
S 900
Interface Material
Graphite S 900 is a highly densed, natural
graphite without binding material, which
is rolled or pressed into fi lms or plates.
S 900 has exceptional qualities and is there-
fore used particularly as a cost-effective
alternative to conventional interface mater-
ial. Especially, the anisotropy of the ther-
mal properties (coupled with a possible
weight saving of up to 30% compared to
conventional materials made of copper or
aluminum), makes the S 900 interesting for
headspreader applications.
In addition, applications in vacuum or
even at high temperatures (400 °C) are
possible. Graphite S 900 has no electri-
cal insulation and can be customized
and applied with an adhesive coating.
Graphite Films
Compression S 900
Rth [K/W]
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
0.18
0 10 20 30 40 50 60 70
Rth/R
pressure [N/cm²]
Kompressibilität des Keratherm® Grat S900
Rth
R
Optional available with
oneside adhesive coating as S 900K
Data for engineer guidance only.
Observed performance varies in application.
Engineers are reminded to test the material
in application.
Chipsets
Memory chips
Micro BGA
Properties Unit S 900
Colour black
Thermal Properties
Thermal resistance R
th
K/W 0.08
Thermal impedance R
ti
°Cmm²/W 34
Kin²/W 0.047
Thermal conductivity λ z (x/y) W/mK 7.5 (> 300)
Electrical Properties
Breakdown voltage U
d; ac
kV conductive
Electrical resistance z (x/y) Ωµm 700 - 800 (7 - 9)
Mechanical Properties
Measured thickness (+/-10%) mm 0.290
Hardness Shore D 25 - 35
Tensile strength N/mm² 10.0
Elongation % 5
Physical Properties
Application temperature °C -40 to +500
Density g/cm³ > 1.6
Total mass loss (TML) Ma.-% 0.01
Flame rating UL-94 V-0
Possible thickness mm 0.15 - 0.29