Thermal
2
Silicone Sheet (0.006 in.)
Bare Joint
Floroether Oil Sheet (0.007 in.)
Graphite/Oil Sheet (0.005 in.)
Synthetic Grease
Specific Thermal Resistance (K-in.
2
/W)
1.5
1
0.5
0
0
10
20
30
40
50
60
70
80
Contact Pressure (psi)
Figure 47. Thermal Performance of Select Thermal Interface Materials
The system board designer can choose between several types of thermal interface. There are several
commercially-available thermal interfaces provided by the following vendors:
Chomerics, Inc.
77 Dragon Ct.
Woburn, MA 01888-4014
Internet: www.chomerics.com
Dow-Corning Corporation
Dow-Corning Electronic Materials
2200 W. Salzburg Rd.
Midland, MI 48686-0997
Internet: www.dowcorning.com
Shin-Etsu MicroSi, Inc.
10028 S. 51st St.
Phoenix, AZ 85044
Internet: www.microsi.com
The Bergquist Company
18930 West 78
th
St.
Chanhassen, MN 55317
Internet: www.bergquistcompany.com
781-935-4850
800-248-2481
888-642-7674
800-347-4572
MPC8540 Integrated Processor Hardware Specifications, Rev. 4
84
Freescale Semiconductor
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
